BG-2240D-AM - Blender TOA - Free user manual and instructions

Product Type	5-Input Mixer Amplifier for Background Music and Announcements
Power Output	240 W (rated), 70 V speaker output
Inputs	MIC (balanced, 600 Ω), LINE 1/TEL (selectable, balanced), LINE 2 (unbalanced, RCA/terminal), LINE 3 (unbalanced, RCA/terminal), MODULE (for 900 series plug-in)
Outputs	Speaker (70 V, 21 Ω), MOH (balanced, 600 Ω, 0 dB), Line (unbalanced, 600 Ω, 0 dB)
Frequency Response	50 Hz – 20 kHz
Total Harmonic Distortion	0.8% or less at 1 kHz, 1/3 rated output
Tone Controls	Bass: ±10 dB at 100 Hz, Treble: ±10 dB at 10 kHz
Muting Functions	Manual mute (remote terminal), Automatic mute (signal-activated via DIP switches), adjustable sensitivity
MOH Output Assignment	Individual inputs assignable to MOH output for 2-zone broadcast with optional booster amplifier (BA-235/BA-260)
Remote Volume Control	10 kΩ linear taper potentiometer (external) for speaker output level
Phantom Power	24 V DC for MIC input (switchable via DIP switch)
Indicators	Power (blue), Signal (green), Peak (red)
Power Supply	120 V AC, 60 Hz (rated voltage); Power consumption: 300 W (max)
Operating Temperature	0 °C to 40 °C (32 °F to 104 °F)
Dimensions (W x H x D)	264 mm x 94.3 mm x 267.3 mm (10.39" x 3.71" x 10.52")
Weight	3.5 kg (7.72 lb)
Accessories Included	5 x YA-920 Volume Control Covers, 4 x 2-pin terminal plugs, 2 x 3-pin terminal plugs, 1 x 4-pin, 1 x 5-pin
Optional Accessories	Rack Mounting Bracket MB-1000, Booster Amplifiers BA-235/BA-260
Rack Mounting	19" rack with optional MB-1000 (requires 4 M4 screws not supplied)
Protection Features	Thermal protection (shuts down output above 85 °C), Automatic electronic drive limiter

Frequently Asked Questions - BG-2240D-AM TOA

How do I connect speakers to the BG-2240D?

Connect speakers to the Speaker Output terminal (70 V, removable terminal block). Ensure total impedance is 21 Ω or higher. Use Class 2 wiring. Tighten the fixing screws after inserting the wired plug.

What is the MOH output used for?

The MOH (Music on Hold) output allows 2-channel broadcast when connected to an optional booster amplifier (BA-235 or BA-260). Inputs assigned via Function Switch B DIP switches 6-10 are sent to this output. Note that tone controls, mute, and remote volume do not affect MOH.

How do I set up automatic muting?

Use Function Switch A (DIP 3-5) to set Mute Send inputs (MIC, LINE 1/TEL, MODULE). Use Function Switch B (DIP 1-5) to set Mute Receive inputs. Adjust Mute Sensitivity control on the rear. When a signal enters a Mute Send input, the Mute Receive inputs are muted.

How do I enable phantom power for a microphone?

Set DIP switch 2 of Function Switch A to ON to supply 24 V DC to the MIC input. Ensure the microphone is compatible with phantom power. Power off before changing this setting.

Can I connect an unbalanced microphone?

Yes, the MIC input is electronically balanced but can accept unbalanced signals. Use terminal block connections: connect signal to H (hot), ground to E (earth), and leave C (cold) unconnected or short to E if needed.

How do I use the remote volume control?

Connect a 10 kΩ linear taper potentiometer to the Remote Volume terminals (+ and -). Adjusting the pot controls the speaker output level. Do not ground the negative terminal.

What is the difference between Mute Send and Mute Receive?

Mute Send inputs trigger muting when audio is present. Mute Receive inputs are the ones that get muted. You assign these via DIP switches. Avoid assigning the same input to both roles.

How do I install a plug-in module?

Turn off power. Remove the blank panel over the Module port. Align the 900 Series module with guide rails and press in. Secure with screws supplied with the module. Consult TOA dealer for compatible modules.

How should I clean the amplifier?

Unplug the power cord. Clean the exterior with a dry cloth only. Do not use water, solvents, or abrasive cleaners. Ensure ventilation slots are free of dust.

What do the indicators mean?

Power indicator (blue) lights when power is on. Signal indicator (green) lights when audio is output. Peak indicator (red) flashes when output nears clipping; if steady lit, reduce input volume.

USER MANUAL BG-2240D-AM TOA

This figure represents the BG-2240D.

TABLE OF CONTENTS

1. IMPORTANT SAFETY INSTRUCTIONS .... 2
2. SAFETY PRECAUTIONS .... 3
3. GENERAL DESCRIPTION 5
4. FEATURES 5
5. NOMENCLATURE AND FUNCTIONS

Front 6

Rear 7

1. CONNECTIONS

6.1. Removable Terminal Plug Connection 9
6.2. Input Connections 9
6.3. Plug-In Module Input Connection ..... 10
6.4. Output Connections 10
6.5. Manual Mute Terminal Connection .... 11
6.6. Remote Volume Control Connection .. 11

1. MUTING FUNCTION

7.1. Manual Mute 12

7.2. Automatic Mute 13
8. MOH OUTPUT ASSIGNMENT ...... 13
9. 2-CHANNEL BROADCAST .... 14
10. OPERATION 15
11. INSTALLATION PRECAUTIONS .... 15
12. RACK MOUNTING BRACKET ATTACHMENT .... 15
13. VOLUME SETTING 16
14. VOLUME CONTROL COVER .... 16
15. BLOCK DIAGRAM 17
16. DIMENSIONAL DIAGRAM 18
17. SPECIFICATIONS 19

Accessories 20

Optional Product 20

1. IMPORTANT SAFETY INSTRUCTIONS

• Read these instructions.
• Keep these instructions.
• Heed all warnings.
• Follow all instructions.

- Do not use this apparatus near water.

- Clean only with dry cloth.

- Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.

- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

- Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.

- Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

- Only use attachments/accessories specified by the manufacturer.

- Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.

- Unplug this apparatus during lightning storms or when unused for long periods of time.

- Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

INSTRUCTIONS ESSENTIELLES POUR LA SÉCURITÉ

• Before installation or use, be sure to carefully read all the instructions in this section for correct and safe operation.
• Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or cautions regarding safety.
  • After reading, keep this manual handy for future reference.

Safety Symbol and Message Conventions

Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage which could result from mishandling. Before operating your product, read this manual first and understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operation and maintenance (servicing) instruction in the literature accompanying the appliance.

Indicates a potentially hazardous situation which, if mishandled, could result in death or serious personal injury.

When Installing the Unit

• WARNING: Do not expose the unit to rain or an environment where it may be splashed by water or other liquids, as doing so may result in fire or electric shock.
• Use the unit only with the voltage specified on the unit. Using a voltage higher than that which is specified may result in fire or electric shock.
• Do not cut, kink, otherwise damage nor modify the power supply cord. In addition, avoid using the power cord in close proximity to heaters, and never place heavy objects -- including the unit itself -- on the power cord, as doing so may result in fire or electric shock.
• Avoid installing or mounting the unit in unstable locations, such as on a rickety table or a slanted surface. Doing so may result in the unit falling down and causing personal injury and/or property damage.
• External wiring connected to the terminals marked with 14 requires installation by an instructed person.
• The apparatus shall be connected to a mains socket outlet with a protective earthing connection.
• L'appareil doit être branché à une prise d'alimentation avec mise à la terre de protection.
• The socket-outlet shall be installed near the equipment and the plug (disconnecting device) shall be easily accessible.
• Use the optional Rack mounting bracket MB-1000 when mounting the unit(s) in an equipment rack. Remove four M4 x 8 screws on both sides of the unit, and mount the bracket there using the M4 x 16 screws (supplied with the bracket) instead.

When the Unit is in Use

• Should the following irregularity be found during use, immediately switch off the power, disconnect the power supply plug from the AC outlet and contact your nearest TOA dealer. Make no further attempt to operate the unit in this condition as this may cause fire or electric shock.
  · If you detect smoke or a strange smell coming from the unit
  · If water or any metallic object gets into the unit
• If the unit falls, or the unit case breaks
• If the power supply cord is damaged (exposure of the core, disconnection, etc.)

• If it is malfunctioning (no tone sounds.)

• To prevent a fire or electric shock, never open nor remove the unit case as there are high voltage components inside the unit. Refer all servicing to your nearest TOA dealer.

• Do not place cups, bowls, or other containers of liquid or metallic objects on top of the unit. If they accidentally spill into the unit, this may cause a fire or electric shock.
• Do not insert nor drop metallic objects or flammable materials in the ventilation slots of the unit's cover, as this may result in fire or electric shock.

CAUTION

Indicates a potentially hazardous situation which, if mishandled, could result in moderate or minor personal injury, and/or property damage.

When Installing the Unit

• Never plug in nor remove the power supply plug with wet hands, as doing so may cause electric shock.
• When unplugging the power supply cord, be sure to grasp the power supply plug; never pull on the cord itself. Operating the unit with a damaged power supply cord may cause a fire or electric shock.
• When moving the unit, be sure to remove its power supply cord from the wall outlet. Moving the unit with the power cord connected to the outlet may cause damage to the power cord, resulting in fire or electric shock. When removing the power cord, be sure to hold its plug to pull.
• Do not block the ventilation slots in the unit's cover. Doing so may cause heat to build up inside the unit and result in fire.
• Avoid installing the unit in humid or dusty locations, in locations exposed to the direct sunlight, near the heaters, or in locations generating sooty smoke or steam as doing otherwise may result in fire or electric shock.
• To avoid electric shocks, be sure to unplug the unit's power supply cord when connecting speakers.
• Be sure to follow the instructions below when rack-mounting the unit. Failure to do so may cause a fire or personal injury.
• Install the equipment rack on a stable, hard floor. Fix it with anchor bolts or take other arrangements to prevent it from falling down.
• When connecting the unit's power cord to an AC outlet, use the AC outlet with current capacity allowable to the unit.
• No rack-mounting screws are supplied with the unit. Separately prepare the appropriate screws for the rack.

- Keep the amplifier over 10 cm (3.94") away from objects that may obstruct air flow to prevent the unit's internal temperature rise.

Over 10 cm (3.94") Over 10 cm (3.94")

When the Unit is in Use

• Do not place heavy objects on the unit as this may cause it to fall or break which may result in personal injury and/or property damage. In addition, the object itself may fall off and cause injury and/or damage.
• Make sure that the volume control is set to minimum position before power is switched on. Loud noise produced at high volume when power is switched on can impair hearing.
• Do not operate the unit for an extended period of time with the sound distorting. This is an indication of a malfunction, which in turn can cause heat to generate and result in a fire.
• If dust accumulates on the power supply plug or in the wall AC outlet, a fire may result. Clean it periodically. In addition, insert the plug in the wall outlet securely.
• Switch off the power, and unplug the power supply plug from the AC outlet for safety purposes when cleaning or leaving the unit unused for 10 days or more. Doing otherwise may cause a fire or electric shock.

The lighting flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The BG-2240D is 5-input mixer amplifiers for background music and general announcement. This unit is suited for use in bars, retail stores, and banquet rooms, and are equipped with the MOH output that permits 2-channel broadcast when used in conjunction with the optional booster amplifier BA-235 (35 W) or BA-260 (60 W).

4. FEATURES

• Each input freely assignable to the MOH output.
• Automatic or manual mute function.
- Easy setting of each function with the rear-mounted DIP switches. (Each input to MOH output assignment settings, Mute settings, LINE 1/TEL level settings, and Phantom power ON/OFF setting)
• Supplied volume control covers prevent accidental operation of input knobs.
- Front operable bass and treble controls.
Also front panel recessed knobs help to prevent accidental operation.
- Removable input/output terminal blocks facilitate installation and maintenance.
Besides, RCA jacks provided for Lines 2 and 3.
- External remote volume control for speaker output level adjustment.

5. NOMENCLATURE AND FUNCTIONS

[Front]

This figure represents the BG-2240D.

1. Power switch

Power is switched on and off with each depression of this switch.

2. Power indicator

Lights blue when the Power switch (1) is switched on.

3. Microphone input volume control

Adjusts gain of the microphone input. Turn the knob clockwise to increase the volume and counterclockwise to decrease it.

Note

This control is not active for the MOH output terminal (25).

4. Line 1/TEL input volume control

Adjusts gain of the Line 1 or TEL input. Turn the knob clockwise to increase the volume and counterclockwise to decrease it. Refer to the Function switch (15) on the next page to switch between Line 1 or TEL.

Note

This control is not active for the MOH output terminal (25).

5. Line 2 input volume control

Adjusts gain of the Line 2 input. Turn the knob clockwise to increase the volume and counterclockwise to decrease it.

Note

This control is not active for the MOH output terminal (25).

6. Line 3 input volume control

Adjusts gain of the Line 3 input. Turn the knob clockwise to increase the volume and counterclockwise to decrease it.

Note

This control is not active for the MOH output terminal (25).

7. Module input volume control

Adjusts gain of the Module input. Turn the knob clockwise to increase the volume and counterclockwise to decrease it.

Note

This control is not active for the MOH output terminal (25).

8. Signal level indicator

Lights green when audio signals are output from the speaker output terminal.

9. Peak indicator

Lights red if output signals approach clipping level. If steady lit, turn down the corresponding input volume control until the indicator flashes intermittently.

10. Bass control

Turn the knob clockwise to increase bass level and counterclockwise to decrease it. The center position of the control provides flat frequency response.

11. Treble control

Turn the knob clockwise to increase treble level and counterclockwise to decrease it. The center position of the control provides flat frequency response.

[Rear]

12. Line 3 input terminals

10 kΩ , -10 dB*, unbalanced, removable terminal block and RCA jacks. (Upper and lower RCA jacks are internally, passively mixed.)

Connect a sound source equipment such as a CD player.

13. Line 2 input terminals

10 kΩ , -10 dB*, unbalanced, removable terminal block and RCA jacks. (Upper and lower RCA jacks are internally, passively mixed.)

Connect a sound source equipment such as a CD player.

14.Line 1/TEL input terminal

10 kΩ , -10 dB* (LINE 1)/-20 dB* (TEL)

Electronically-balanced, removable terminal block. Use the Function switch A (15) to select either Line 1 or TEL.

Connect a telephone or a sound source equipment.

15. Function switch A

Used for LINE 1/TEL gain switching, phantom power ON/OFF settings, and Mute Send mode settings.

- DIP switch 1

ON: Switches the LINE 1/TEL input gain to LINE 1 (-10 dB).

OFF: Switches the LINE 1/TEL input gain to TEL (-20 dB).

- DIP switch 2

Sets ON or OFF depending on whether or not the microphone connected to the MIC input requires phantom power.

ON: Supplies phantom power (24 V DC) to the microphone.

OFF: Turns off the phantom power supply.

- DIP switch 3

Set to ON to place the MIC input in Mute Send mode (audio signal-activated muting mode).

- DIP switch 4

Set to ON to place the LINE 1 or TEL input in Mute Send mode (audio signal-activated muting mode).

- DIP switch 5

Set to ON to place the MODULE input in Mute Send mode (audio signal-activated muting mode).

Notes

• Switch 1 is set to the ON position by default.
• Switches 2 – 5 are set to the OFF position by default.
• Be sure to turn off the power before performing above settings. Failure to do so may cause the loud noise to be generated or unit failure.

16. Mute sensitivity control

Adjusts the threshold level for the MIC, LINE 1/TEL, and MODULE inputs to activate the mute function. Turn clockwise to increase the threshold level (lower sensitivity), and counterclockwise to decrease it (higher sensitivity).

Note

The audio signal level to activate muting is independent of input volume settings. So, the Mute Receive input is muted if a signal enters the MIC, LINE 1/TEL, or MODULE input even when the input volume is turned down. To avoid unwanted muting caused by unintentional inputs such as background noise and noise sound, it is recommended to cut the audio signal at the input equipment (such as a microphone with talk switch).

$$ ^ {*} 0 \mathrm{dB} = 1 \mathrm{V} $$

17. Manual Mute terminals

Closing between (+) and (−) terminals mutes the input signal set for Mute Receive by the Function switch B (24).

Opening between (+) and (−) terminals returns the previously muted signal gradually to its original level.

Notes

• This function is active regardless of the Automatic mute ON/OFF settings using the Function switch A (15).
• This function is not active for the MOH output terminal.

18. Microphone input terminal

600 Ω, -60 dB*, electronically-balanced, removable terminal block.

Connect a microphone.

19. Module input port

Accepts one of 900 series plug-in modules. For the selection of the most appropriate module, refer to Plug-in Module instruction manual.

20. Functional ground terminal

Hum noise may be generated when external equipment is connected to the unit. Connecting this terminal to the functional ground may reduce the hum noise.

Note

This terminal is not for protective earth.

21. AC power cord

Connect this cord to an AC wall outlet.

22. Speaker output terminal

70 V output, removable terminal block.

Connects to speakers. Refer to p.10

23. Function switches B

Used for MOH Assignment and Mute Receive function settings.

• DIP switch 1
  Set to ON to place the MIC input in MUTE Receive mode.
• DIP switch 2
  Set to ON to place the LINE 1/TEL input in Mute Receive mode.

- DIP switch 3

Set to ON to place the LINE 2 input in Mute Receive mode.

- DIP switch 4

Set to ON to place the LINE 3 input in Mute Receive mode.

- DIP switch 5

Set to ON to place the MODULE input in Mute Receive mode.

- DIP switch 6

Set to ON to output the MIC input to the MOH output.

• DIP switch 7
  Set to ON to output the LINE 1/TEL input to the MOH output.

- DIP switch 8

Set to ON to output the LINE 2 input to the MOH output.

- DIP switch 9

Set to ON to output the LINE 3 input to the MOH output.

• DIP switch 10

Set to ON to output the MODULE input to the MOH output.

Notes

• Switches 1 – 10 are set to the OFF position by default.
• Be sure to turn off the power before performing above settings. Failure to do so may cause the loud noise to be generated or unit failure.

24. MOH volume control

Adjusts the gain of the MOH output level (26)

25. MOH output terminal

600 Ω, 0 dB*, transformer-isolated, removable terminal block.

By connecting the input terminal of the BA-235 or BA-260, 2-channel broadcast can be made.

Refer to p.11.

Note: Bass and treble controls are not active for this output.

26. Line output terminal

600 Ω, 0 dB*, unbalanced, removable terminal block.

Note: Bass and treble controls are not active for this output.

27. Remote volume terminal

Removable terminal block.

Connecting a 10 kΩ linear taper volume control across these terminals will allow remote control of speaker output level.

$$ ^ {*} 0 \mathrm{dB} = 1 \mathrm{V} $$

6. CONNECTIONS

6.1. Removable Terminal Plug Connection

Notes

- Avoid soldering cable conductor, as contact resistance may increase when the cable is tightened and the solder is crushed, possibly resulting in an excessive rise in joint temperatures.

- Use cables of AWG 12 – 24.

[Cable end treatment]

2-core shielded cable Solid cable and stranded cable

[Wiring Procedure]

Step 1. Wiring the supplied removable terminal plug.

1-1. Loosen the terminal screws to insert the wire.
1-2. Tighten the terminal screws.

Ensure that the wire does not break free when pulled. If the wire does pull free, repeat the connection procedure from the start.

Step 2. Insert the wired terminal plug into the corresponding terminal block in the unit's rear panel.

Step 3. Tighten the fixing screws. (Speaker output terminals only)

Notes

• Do not reverse Steps 1 and 2. Poor contact may result if force is applied to the unit's internal circuit board pins while the terminal screws are being tightened.
• Use an appropriate type screwdriver for terminal plug wiring.

6.2. Input Connections

6.2.1. MIC input connections

6.2.2. LINE 1/TEL input connections

6.2.3. LINE 2, LINE 3 input connections

Upper and lower RCA jacks are internally, passively mixed.

6.3. Plug-In Module Input Connection

A single port for TOA plug-in modules is located on the unit's rear panel. Any 900 Series plug-in module can be inserted into this port.

Notes

• Consult your nearest TOA dealer for selection of appropriate module types.
• Be sure to turn off the power before installing the module.

[Installation]

Step 1. Remove the blank panel covering the module slot on the rear panel.

Step 2. Align the module board with the top and bottom guide rails, and press in.

Step 3. Using the screws supplied with the module, secure the module to the rear panel.

6.4. Output Connections

6.4.1. Speaker connections

Amplifier has a 70 V speaker output. Class 2 wiring may be used.

Note: Impedances in the figures below represent total speaker load impedance.

Speaker output terminal

WARNING

The terminals marked with the symbol ♣ are hazardous live. The external wiring to these terminals requires installation by an instructed person.

6.4.2. MOH output connection

The MOH output is 0 dB*, 600 Ω, and balanced (transformer-isolated).

* 0 dB = 1 V

MOH OUT (ZONE2)

Note

When connecting equipment with unbalanced input, short-circuit the "C" and "E" lines as shown at right.

MOH OUT (ZONE2)

6.4.3. Line output connection

The Line output is 0 dB*, 600 Ω, and unbalanced.

* 0 dB = 1 V

6.5. Manual Mute Terminal Connection

Closing between the manual mute (+) and (−) terminals causes the Mute Receive inputs to be muted (the inputs set to be muted).

Short-circuit current: 1 mA or less Open voltage: 15 V or less

6.6. Remote Volume Control Connection

The mixed output level at post-input volume controls can be adjusted with an external remote volume control.

Note that individual input volume control positions limit the maximum output level adjustable with the remote volume control. Be sure to avoid turning down all input volume controls.

Notes

• Negative terminal should not be grounded. Never connect it to the unit's chassis nor other circuit ground.
• Only a volume control can be connected to this terminal.

Volume control 10 kΩ (linear-taper)

7. MUTING FUNCTION

Manual mute and Automatic mute are available for the muting function.

Manual mute is a function to mute the MIC, LINE 1/TEL, LINE 2, LINE 3 and/or MODULE input placed in Mute Receive mode when the manual mute terminal is short-circuited.

Automatic mute is an audio-signal activated muting function to automatically mute the MIC, LINE 1/TEL, LINE 2, LINE 3 and/or MODULE input placed in Mute Receive mode when audio signals enter the MIC, LINE 1/TEL, or MODULE input placed in Mute Send mode.

Neither manual mute nor Automatic mute works on the MOH output.

7.1. Manual Mute

Step 1. Set the inputs to be muted (Mute Receive inputs) with the Function switch B.

Shift the DIP switches 1 to 5 to ON position to place each corresponding input in Mute Receive (muted) mode as follows.

• DIP switch 1: MIC input
• DIP switch 2: LINE 1/TEL input
• DIP switch 3: LINE 2 input
• DIP switch 4: LINE 3 input
• DIP switch 5: MODULE input

Note

Avoid assigning both Mute Receive and Mute Send functions to the same input.

Step 2. Close between the Manual mute (+) and (−) terminals.

The Inputs set for Mute Receive in Step 1 are muted.

Step 3. Open between these terminals.

The signal being muted returns gradually to its original level in about 3 to 8 seconds.

Note: This function is active regardless of the Automatic mute ON/OFF setting using the Function switch A.

7.2. Automatic Mute

Step 1. Set the inputs to mute (Mute Send inputs) with the Function switch A.

Shift the DIP switches 3 to 5 to ON position to place each corresponding input in Mute Send (muting) mode as follows.

• DIP switch 3: MIC input
• DIP switch 4: LINE 1/TEL input
• DIP switch 5: MODULE input

Step 2. Set the inputs to be muted (Mute Receive inputs) with the Function switch B.

Shift the DIP switches 1 to 5 to ON position to place each corresponding input in Mute Receive (muted) mode as follows.

• DIP switch 1: MIC input
• DIP switch 2: LINE 1/TEL input
• DIP switch 3: LINE 2 input
• DIP switch 4: LINE 3 input
• DIP switch 5: MODULE input

Note

Avoid assigning both Mute Send and Mute Receive functions to the same input.

Step 3. Adjust the threshold level with the Mute Sensitivity Control at which the input placed in Mute Send mode in Step 1 will activate the muting function.

Note

The audio signal level to activate muting is independent of input volume settings. So, the Mute Receive input is muted if a signal enters the input placed in Mute Send mode in Step 1 even when the input volume is turned down. To avoid unwanted muting caused by unintentional inputs such as background noise and noise sound, it is recommended to cut the audio signal at the input equipment (such as a microphone with talk switch).

Step 4. The Mute Receive inputs (set in Step 2) are muted when audio signals enter the Mute Send inputs (set in Step 1).

Step 5. When the input signals are not present, the signal being muted returns gradually to its original level in about 1 to 5 seconds.

8. MOH OUTPUT ASSIGNMENT

Inputs selected by the Function switch B can be output to MOH output.

Use the rear-mounted MOH volume control "LEVEL" to adjust the output level.

Notes

Following are precautions on the MOH output.

• Each individual input level setting cannot be performed (the volume control does not work). Adjust the volume level at the input equipment as needed.
- Bass and treble controls do not work.
- Mute control does not work.
- Remote volume control does not work.

[MOH Output Setting]

Set the input to be output to the MOH output using the Function switch B.

The DIP Switch numbers correspond to the inputs as follows.

DIP switch 6: MIC input
DIP switch 7: LINE 1 /TEL input
DIP switch 8: LINE 2 input
DIP switch 9: LINE 3 input
DIP switch 10: MODULE input

9. 2-CHANNEL BROADCAST

Input signals set in Chapter 8 are output to the MOH output.

2-channel broadcast can be performed when the unit is used in conjunction with the optional BA-235 (35 W) or BA-260 (60 W).

(Example)

When MIC, LINE 1/TEL, LINE 2, LINE 3, and MODULE input signals are output to the Zone 1, and LINE 2 input signals to the Zone 2.

graph TD
    A["Sound source A"] --> B["MIC"]
    C["Sound source B"] --> D["LINE 1/TEL"]
    E["Sound source C"] --> F["LINE 2"]
    G["Sound source D"] --> H["LINE 3"]
    I["Sound source E"] --> J["MODULE"]
    B --> K["SPEAKER OUT"]
    D --> K
    F --> K
    H --> K
    J --> K
    K --> L["MOH OUT"]
    L --> M["(ZONE 1)"]
    L --> N["(ZONE 2)"]
    L --> O["(ZONE 2)"]
    P["MOH assignment"] --> Q["MOH OUT"]
    R["Line IN"] --> S["SPEAKER OUT"]
    T["Effective"] --> U["(ZONE 1)"]
    T --> V["(ZONE 2)"]
    W["Invalid"] --> X["(ZONE 2)"]
    style A fill:#f9f,stroke:#333
    style C fill:#f9f,stroke:#333
    style E fill:#f9f,stroke:#333
    style G fill:#f9f,stroke:#333
    style I fill:#f9f,stroke:#333
    style P fill:#f9f,stroke:#333
    style T fill:#f9f,stroke:#333

10. OPERATION

After completing all connections, turn on the power switch, and check to confirm that the power indicator lights.

Note

When the heat sink temperature exceeds 85 °C (185 °F), the protection circuit begins to operate to disconnect the output from the circuit. The disconnected output is automatically restored as soon as the temperature returns to the normal operating range.

11. INSTALLATION PRECAUTIONS

CAUTION

Keep the amplifier over 10 cm (3.94") away from objects that may obstruct air flow to prevent the unit's internal temperature rise.

Over 10 cm (3.94") Over 10 cm (3.94")

12. RACK MOUNTING BRACKET ATTACHMENT

To mount the amplifier in a standard 19" equipment rack, use the optional MB-1000 Rack Mounting Bracket. Attach the MB-1000 to the amplifier using the 4 supplied screws. When using other screws, ensure that each screw is shorter than 16 mm(0.63").

Step 1. Remove 4 screws on both sides of unit. The removed screws are not used.

Step 2. Attach the MB-1000 to the unit using 4 screws supplied with the MB-1000.

Machine screw M4 x 16 (supplied with the MB-1000)

Screw removed in Step 1 are not used.

Notes

• Rack mounting screws are not supplied with the unit. Use the screws that are appropriate for the rack.
• When mounting the unit in an equipment rack, the inside of the rack must be sufficiently ventilated. To achieve sufficient ventilation, also mount the optional PF-511 Perforated Panel (1U*):
  (1) at the top and the bottom of the rack, and
  (2) above and below the unit.

- Remove 4 plastic feet on the bottom surface when mounting the unit in a rack.

* 1U size = 44.5 mm or 1.75" (reference size)

13. VOLUME SETTING

Output levels are adjustable with individual volume controls. For music play or announcement, adjust the corresponding volume control so that the signal indicator lights intermittently. Note that the sound quality is downgraded when the peak indicator remains lit.

14. VOLUME CONTROL COVER

To prevent the accidental change of the input volume control settings on the front panel, it is recommended to replace each control knob with the supplied YA-920 Volume Control Cover. Follow the procedure below for its replacement.

Step 1. Remove the control knob.

Step 2. Adjust the Input volume control (without knob) to an appropriate level.

Step 3. Attach the YA-920 onto the control.

15. BLOCK DIAGRAM

graph TD
    subgraph MUTE
        A["CTRL"] --> B["ELECTRONICALLY BALANCED"]
        C["MIC 600 Ω"] --> B
        D["1. LINE 1/TEL"] --> E["ON"]
        F["2. MIC PHANTOM"] --> E
        G["3. MIC AUTO MUTE"] --> E
        H["4. LINE 1/TEL"] --> I["5. MODULE"]
    end

    subgraph ELECTRONICALLY BALANCED
        J["LINE 1"] --> K["ON"]
        L["LINE 2"] --> K
        M["LINE 3"] --> N["ON"]
        O["MODULE 10 kΩ"] --> P["MODULE"]
    end

    subgraph MUTE SENSE
        Q["LINE 1 / TEL"] --> R["MUTE"]
        S["LINE 2"] --> T["MUTE"]
        U["LINE 3"] --> V["MUTE"]
        W["MODULE"] --> X["MUTE"]
    end

    subgraph MIX AMP
        Y["MIX AMP"] --> Z["MOH"]
        Z --> AA["OT"]
        AA --> AB["MOH OUT (ZONE 2)"]
        AC["10: MOH ASSIGN (MODULE)"] --> AD["9: MOH ASSIGN (LINE 3)"]
        AE["10: MOH ASSIGN (LINE 2)"] --> AF["8: MOH ASSIGN (LINE 2)"]
        AG["10: MOH ASSIGN (LINE 1/TEL)"] --> AH["7: MOH ASSIGN (LINE 1/TEL)"]
        AI["10: MOH ASSIGN (MIC)"] --> AJ["6: MOH ASSIGN (MIC)"]
        AK["10: MUTE RECEIVE (MODULE)"] --> AL["5: MUTE RECEIVE (MODULE)"]
        AM["10: MUTE RECEIVE (LINE 3)"] --> AN["4: MUTE RECEIVE (LINE 3)"]
        AO["10: MUTE RECEIVE (LINE 2)"] --> AP["3: MUTE RECEIVE (LINE 2)"]
        AQ["10: MUTE RECEIVE (LINE 1/TEL)"] --> AR["2: MUTE RECEIVE (LINE 1/TEL)"]
        AS["10: MUTE RECEIVE (MIC)"] --> AT["1: MUTE RECEIVE (MIC)"]

    subgraph TONE CONTROL
        AU["BASS TREBLE"] --> AV["VCA"]
        AW["TABLE"] --> AX["BAL"]
        AY["POWER AMP"] --> AZ["POWER Supply"]
        BA["AUDIO FILTER"] --> BB["+ REMOTE - VOLUME"]
        BC["SPEAKER OUT (ZONE 1)"]
        BD["H LINE OUT E 600 Ω"] --> BE["+ REMOTE - VOLUME"]
        BF["SIGNAL PEAK"] --> BG["POWER SWITCH"]
    end

    subgraph POWER SUPPLY FOR PRE AMP & VR LED & OUTPUT & MODULE
        BH["Regulator +24V"] --> BI["SIGNAL PEAK"]
        BJ["POWER SWITCH"] --> BK["H LINE OUT E 600 Ω"]
    end

    subgraph POWER
    BL["SIGNAL PEAK"] --> BM["SIGNAL PEAK"]
    BN["POWER SWITCH"] --> BO["H LINE OUT E 600 Ω"]
    BS["SPEAKER OUT (ZONE 1)"]
    BT["SPEAKER OUT (ZONE 1)"]
    BU["SPEAKER OUT (ZONE 1)"]
    BV["SPEAKER OUT (ZONE 1)"]
    BW["SPEAKER OUT (ZONE 1)"]
    BX["SPEAKER OUT (ZONE 1)"]
    BY["SPEAKER OUT (ZONE 1)"]
    CA["SPEAKER OUT (ZONE 1)"]
    CB["SPEAKER OUT (ZONE 1)"]
    CC["SPEAKER OUT (ZONE 1)"]
    DD["SPEAKER OUT (ZONE 1)"]
    EE["SPEAKER OUT (ZONE 1)"]
    BFG["SPEAKER OUT (ZONE 1)"]
    BFJ["SPEAKER OUT (ZONE 1)"]
    BG["SPEAKER OUT (ZONE 1)"]
    BHG["SPEAKER OUT (ZONE 1)"]
    BIH["SPEAKER OUT (ZONE 1)"]
    BJH["SPEAKER OUT (ZONE 1)"]
    BKJ["SPEAKER OUT (ZONE 1)"]
    BLG["SPEAKER OUT (ZONE 1)"]
    BLH["SPEAKER OUT (ZONE 1)"]
    BIJG["SPEAKER OUT (ZONE 1)"]
    BJJG["SPEAKER OUT (ZONE 1)"]
    BKJG["SPEAKER OUT (Zone 1)"]
    BLJG["SPEAKER OUT (Zone 1)"]
    BLJH["SPEAKER OUT (Zone 1)"]
    BLJI["GND"] --> BLJG
    BLJL["GND"] --> BLJH
    BLJM["GND"] --> BLJM
    BLJN["GND"] --> BLJN
    BLJO["GND"] --> BLJO
    BLJP["GND"] --> BLJP
    BLJQ["GND"] --> BLJQ
    BLJR["GND"] --> BLJR
    BLJS["GND"] --> BLJS
    BLJT["GND"] --> BLJT
    BLJU["GND"] --> BLJU
    BLJW["GND"] --> BLJW
    BLZ["GND"] --> BLZ
    BLZG["GND"] --> BLZG
    BLZH["GND"] --> BLZH
    BLZI["GND"] --> BLZI
    BLZJ["GND"] --> BLZJ
    BLZK["GND"] --> BLZK
    BLZL["GND"] --> BLZL
    BLZM["GND"] --> BLZM
    BLZN["GND"] --> BLZN
    BLZO["GND"] --> BLZO
    BLZP["GND"] --> BLZP
    BLZQ["GND"] --> BLZQ
    BLZR["GND"] --> BLZR
    BLZS["GND"] --> BLZS
    BLZT["GND"] --> BLZT
    BLZU["GND"] --> BLZU
    BLZW["GND"] --> BLZW
    BLZX["GND"] --> BLZX
    BLZY["GND"] --> BLZY
    BLZWG["GND"] --> BLZWG
    BLZXW["GND"] --> BLZXW
    BLZYX["GND"] --> BLZYX

    %% Legend
    style MUTE fill:#f9f,stroke:#333,stroke-width:2px
    style ELECTRONICALLY BALANCED fill:#ccf,stroke:#333,stroke-width:2px
    style MUTE SENSE fill:#cfc,stroke:#333,stroke-width:2px
    style MIX AMP fill:#fcc,stroke:#333,stroke-width:2px
    style TONE CONTROL fill:#ffc,stroke:#333,stroke-width:2px
    style POWER SUPPLY fill:#cff,stroke:#333,stroke-width:2px

16. DIMENSIONAL DIAGRAM

Unit: mm (in)

17. SPECIFICATIONS

		2240D-GB.oN ledoM
		zH 06 ,CA V 021evoP
tupudetaR		2400
Power Consumption tupudetaR Based on cULus standards		30055 W
		esnopseR ycneuqF zHk 02 - zH 05
Total Harmonic Distortion		0.8% or less, at 1 kHz,1/3 rated output, LPF 20kHz
Input		Microphone, Line 1/TEL (Selectable), Line 2, Line 3, Module
Input Sensitivity/		Microphone: -60 dB*, 600 Ω, electronically balanced, removable Impedance terminal blockLine 1/TEL: -10 dB*/-20 dB*, 10 kΩ, electronically balanced, removable terminal blockLine 2: -10 dB*, 10 kΩ, unbalanced, removable terminal block and RCA jacksLine 3: -10 dB*, 10 kΩ, unbalanced, removable terminal block and RCA jacksModule
Output	Speaker Output	70 V (21 Ω) balanced, removable terminal block
	MOH Output	0 dB*, 600 Ω, balanced, removable terminal block
	Line Output	0 dB*, 600 Ω, unbalanced, removable terminal block
Output Regulation (1 kHz)		Under 2 dB, no load to full load
S/N Ratio		Microphone: Over 60 dBLine 1/TEL: Over 73 dBLine 2: Over 73 dBLine 3: Over 73 dBModule: Over 73 dB(A-weighted, Tone Controls: Centered)
Tone Control		Bass: ±10 dB at 100 Hz, Treble: ±10 dB at 10 kHz
Control		Microphone gain control, Line 1/TEL gain control, Line 2 gain control, Line 3 gain control, Module gain control, Bass tone control, Treble tone controlMOH out gain controlMute control (Manual mute)Remote volume controlMute sensitivity controlLine 1/TEL selector switchPhantom power switch (Microphone)Automatic mute switch (Microphone, Line 1/TEL, Module)Mute receive switch (Microphone, Line 1/TEL, Line 2, Line 3, Module)MOH assign switch (Microphone, Line 1/TEL, Line 2, Line 3, Module)Power ON/OFF switch
Indicator		Power LED, Signal level LED, Peak LED
Other Feature		Automatic electronic drive limiter
Operating Temperature		0 to 40 °C (32 to 104 °F)
Operating Humidity		35% - 80% RH (no condensation)
Finish		Panel: ABS resin, blackCase: Steel plate, black, paint
Dimensions		264 (w) x 94.3 (h) x 267.3 (d) mm (10.39" x 3.71" x 10.52")
Weight		3.5 kg (7.72 lb)

* 0 dB = 1 V
Note: The design and specifications are subject to change without notice for improvement.

- Accessories

YA-920 Volume control cover 5

Removable terminal plug (2P) 4

Removable terminal plug (3P) 2

Removable terminal plug (4P) 1

Removable terminal plug (5P) 1

- Optional Product

Rack mounting bracket: MB-1000