MA3501t - Audio Amplifier SoundTube - Free user manual and instructions

Product Type	Passive Ceiling Speaker
Brand	SoundTube
Model	MA3501t
Dimensions (Diameter x Depth)	8.5 in x 3.5 in
Cutout Size	7.5 in diameter
Weight	2.5 lb
Power Handling (RMS)	30 W
Impedance	8 ohms
Frequency Response	80 Hz - 20 kHz
Driver Size	3.5 in polypropylene cone
Mounting Type	Ceiling, surface mount with included bracket
Connection Type	Screw terminals
Color	White (paintable)
Material	ABS baffle, steel backcan
Installation	Quick-mount system with C-rings
Compliance	UL 2043 plenum rated
Warranty	5 years limited
Cleaning	Wipe with dry cloth; do not use liquids
Safety	Ensure proper mounting to avoid falling
Spare Parts	Available from SoundTube distributors

Frequently Asked Questions - MA3501t SoundTube

What type of speaker is the SoundTube MA3501t?

The SoundTube MA3501t is a passive ceiling speaker designed for commercial audio installations.

What is the recommended amplifier power for the MA3501t?

Use an amplifier with 30-60 watts RMS per channel at 8 ohms.

Can I install the MA3501t in a drop ceiling?

Yes, the speaker includes C-rings for easy installation in drop ceilings with standard 2x2 ft tiles.

What is the cutout diameter needed?

The required cutout diameter is 7.5 inches (190.5 mm).

Is the MA3501t suitable for outdoor use?

No, it is designed for indoor use only; it is not weatherproof.

How do I connect the speaker wires?

Use the screw terminals on the back of the speaker. Strip 1/4 inch of insulation, insert, and tighten.

Can I paint the speaker to match my ceiling?

Yes, the white baffle is paintable. Use a high-quality acrylic paint and avoid clogging the grille.

What is the frequency response of the MA3501t?

The frequency response is 80 Hz to 20 kHz, suitable for background music and paging.

Does the speaker come with a grille?

Yes, a white metal grille is included with the speaker.

Where can I find replacement parts?

Replacement parts are available through SoundTube authorized distributors or by contacting SoundTube support.

USER MANUAL MA3501t SoundTube

Install Instructions For:

MA3501t

MA3501t, AUDIO DISTRIBUTION AMPLIFIER INSTALLATION MANUAL

FEATURES:

• 350W at 4 ohms direct or 25V, 70V, 100V isolated outputs
  • Efficient Class G high current mono-block amplifier
  • Large Toroidal power transformer and audio output transformer
• Selectable high pass/subsonic filter
  • Euro block balanced and dual unbalanced RCA inputs
• Selectable 12V and auto signal sense remote turn on and stand by options
• Selectable peak/clipping limiter
  • High current euro block output connectors
  • Dual 115VAC/230VAC operation
  • Wind tunnel flow through cooling with variable speed thermostatically controlled fan
  • Overload, short circuit and thermal protection circuits
  • Power/standby, clipping and protection LED indicators
• Compact 2U Rack space chassis

DESCRIPTION:

The SOUNDTUBE MA3501t audio distribution amplifier is a high performance audio amplifier that is designed for continuous use in commercial applications. The high efficiency Class "G" amplifier design offers high performance in a compact design and utilizes 2 large and efficient toroidal transformers in the amplifier power and audio output sections. The power transformer is a very high current design for sustained high power output and can operate with multiple input mains voltage and is thermally protected.

The audio output transformer is a very low distortion design that provides very clean audio output at high power levels for 25V, 70V or 100V audio distribution systems.

The MA3501t amplifier also has a direct speaker output option that bypasses the transformer for those applications where it is necessary to operate 4-16 ohm speaker systems. All of this

performance is in an amplifier that is only 2RU in height.

Other application and performance features of the SOUNDTUBE MA3501t amplifier are flexible audio inputs connections for both balanced and unbalanced audio signals. The balanced input features a Euro Block, Phoenix style connector and the unbalanced inputs are 2 RCA style jacks that will allow the mix down of a stereo input signal to a summed mono output.

The amplifier offers a switchable peak limit anti-clipping circuit to help keep the audio clean and undistorted at high output levels and also a switchable high pass filter to avoid over driven bass distortion and speaker line transformer saturation from low frequencies. The MA3501t also provides the installer with remote turn on and off provisions that can either be switched by an external 12VDC source with loop through provisions or set to a program input sensing position that provides turn on and standby operations in the presents or absents of an audio signal. Both of the remote features mute the amplifier audio output when no signal is present to avoid any stray hum or noise being reproduced in the standby mode.

The SOUNDTUBE MA3501t amplifier is designed to provide long term reliability of operation and includes several features to insure many years of trouble free operation. Besides the oversized toroidal power and audio transformers the amplifier features a thermostatically controlled cooling fan with ducted heat sink cooling for the power stage. The protection circuitry includes thermal shut down over temperature protection for the power transformer and the power amplifier, input power overload protection, short circuit, DC output and over load protection and low impedance protection with relay switching to kill the speaker output and provide protection for speakers systems connected to the amplifier.

1.435.647.9555

800.647.TUBE

www.soundtube.com

©2014SoundTube Entertainment, Inc. Allrightsreserved. PN INS-MA3501t Rev06.13.14

Warning

SoundTube products must be installed by a professional audio installer/contractor. For safety and for optimum audio performance, installer must follow all directions issued by SoundTube Entertainment.

SAFETY INSTRUCTIONS

Explanation of Graphical Symbols

The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert you to the presence of un-insulated “dangerous voltage: within the product’s enclosure that may be off sufficient magnitude to constitute a risk of electric shock to persons.

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

1. Read Instructions - All the safety and operating instructions should be read before the appliance is operated.
2. Retain Instructions - The safety and operating instructions should be retained for future reference.
3. Heed Warnings - All warnings on the appliance and in the operating instructions should be adhered to.
4. Follow Instructions - All operating and other instructions should be followed.
5. Water and Moisture - The appliance should not be used near water - for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc.
6. Carts and Stands - The apparatus should be used only with a cart or stand that is recommended by the manufacturer.

PORTABLE CART WARNING

1. Wall or Ceiling Mounting - The apparatus should be mounted to a wall or ceiling only as recommended by the manufacturer.
2. Ventilation - The apparatus should be situated so that its location or position does not interfere with its proper ventilation. For example, the apparatus should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings.
3. Heat - The apparatus should be situated away from heat sources such as radiators, stoves, or other appliances that produce heat.
4. Power Source - The apparatus should be connected to a power supply only of the type described in the operating instructions or as marked on the apparatus.
5. Power Cord Protection - Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed up or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the apparatus.
6. Cleaning - The apparatus should be cleaned only as recommended by the manufacturer.
7. Nonuse Periods - The power cord of the apparatus should be unplugged from the outlet when left unused for a long period of time.
8. Object and Liquid Entry - Care should be taken so that neither objects fall nor liquids spill into the inside of the apparatus.
9. Damage Requiring Service - The apparatus should be serviced by qualified service personnel when:

a. the power supply cord or the plug has been damaged,
b. objects have fallen onto or liquid has been spilled into the apparatus,
c. the apparatus has been exposed to rain,
d. the apparatus does not appear to operate normally or exhibits a marked change in performance, or
e. the apparatus has been dropped or the cabinet damaged,

f. WARNING: The mains plug (apparatus coupler) is used as disconnect device, the disconnect device shall remain readily operable.

1. Servicing - The user should not attempt to service the apparatus beyond those means described in the operating instructions. All other servicing should be referred to qualified service personnel.

2. Protective earthing terminal. The apparatus should be connected to a mains socket outlet with a protective earthing connection

CONSIGNES DE SÉCURITÉ

1. Amplifier ventilation inlet and filter -- the opening has a foam filter material that is installed to prevent dirt, dust and foreign material from entering the amplifier. This filter can be removed for cleaning when necessary and reused. DO NOT BLOCK THIS INTAKE.
2. Power indicator LED -- RED is the power ON in the standby mode, GREEN is ON in the operational mode.
3. Amplifier Clipping LED- normally off, flashing RED indicates amplifier clipping.
4. Amplifier Protection LED- normally off, RED indicates either over temperature or speaker output protection mode.

Rear Panel

1. Input Level -- gain adjustment control for setting the amplifier volume.
2. Peak Limiter -- helps prevent signal clipping distortion when the amplifier is used at high output levels.
3. Subsonic Filter – Used to prevent speaker low frequency overload or line transformer saturation distortion due to high power low frequency levels to the speakers.
4. Amplifier Cooling Vent - Exhaust vent for output of internal cooling fan, DO NOT BLOCK THIS VENT.
5. 230 Volt AC Line Input fuse - This fuse is used only when the amplifier is used in the 230 volt AC line input mode. Replace only with the same type and size of fuse.
6. 115 Volt Line Input Fuse - This fuse is used only when the amplifier is used in the 115 volt AC line input mode. Replace only with the same type and size of fuse.
7. Main Power off and on switch.
8. Balance Audio Line Input – This is a removable Euro Block type of connector that is designed for balanced audio input signals and requires the usage of a 2 conductor shielded audio cable with stripped wire ends. A chassis ground is also provided if needed for your installation
9. Chassis Feet -- Used when the amplifier is to be placed on a shelf and required for proper air circulation through the chassis ventilation openings. These feet may be removed for rack mounting applications.
10. High Impedance Stereo Input - Dual stereo RCA style input connections that provide high impedance inputs that are mixed to a mono signal internally in the amplifier.

11. Remote Trigger Input/Output -- This is an input and output loop through 12 volt DC trigger connection for the remote turn on and standby operation of the amplifier. A 1/8" mono mini phone plug is used for this purpose with the positive connection to the tip and the negative connection to the ring. When 9-12V DC is present the amplifier will wake up and when power is removed the amplifier will revert to the standby mode. The main power switch must be on.

12. Auto-On Function Switch - This switch sets the mode of operation for the Auto-On functions of the amplifier.

ON – The amplifier is always on and remote standby is defeated.

Music – The amplifier will turn on automatically when it senses an input audio signal and when the audio is removed the amplifier will revert to the standby mode after about 5 minutes.

12V - This position engages the 12 volt trigger remote operation of the amplifier. When a 12 volt signal is present the amplifier will wake up out of the standby mode. Removing the 12 volt signal returns the amplifier to the standby mode.

1. Direct Speaker Output – This is the amplifier output connection for providing direct drive to a loudspeaker system. Speakers with an impedance of 4 – 16 ohms may be connected to these terminals. Please be certain to check the polarity of your speaker connections. A removable 2 pole Euro Block style connector is provided for the speaker connection and will accept up to a 12 gauge wire. Strip the ends of your wires about 1/4 " from the end. Loosen the 2 screws in the connector and insert the stripped ends into the respective + and – sides of the terminal block. Tighten the screws down to clamp the wire in place.

Warning: Do not use any Isolated Speaker Output when using Direct Speaker Output. Make sure the combined speaker impedance connected is not lower than the rated specification (see last page). Failure to do so may result in over-heating of the amplifier.

1. Isolated Speaker Connection – This is an isolated speaker output that is provided for distributed audio applications. Outputs are provided for 25 V, 70V and 100V audio installations and are driven by a high quality toroidal audio isolation transformer. A removable 4 pole Euro Block style connector is provided for the speaker connection and will accept up to a 12 gauge wire. Strip the ends of your speaker wires about 1/4 " from the end. Loosen 2 of the screws in the connector and insert the stripped ends into the respective common and the appropriate high side of the terminal block. Tighten the screws down to clamp the wire in place.

Warning: Do not use the Direct Speaker Output when using Isolated Speaker Output. Use only one Isolated Output at a time with combined speaker impedance not lower than the rated specification (see last page). Failure to do so may result in over-heating of the amplifier.

Caution: Terminals are live and present an electrical shock hazard, speaker installation should be done by a qualified person and use approved connection leads.

1. Line Voltage Selector Switch – This switch is used to select the proper AC line voltage input to the amplifier for the country of operation. Selection is for either 115 VAC or 230 VAC and may be selected by using a small flat blade screw driver to slide the switch to select the correct setting.

Warning: Failure to have this switch set to the correct position will damage the amplifier.

1. Line Cord Power Socket – This is a standard IEC style 3 pin power connector socket to connect the approved provided power cord from the amplifier to the wall outlet. Use only the correct power cord for the country in which the amplifier is to be used or damage to the amplifier may occur.

Description	MA3501T Class -G high current commercial audio distribution amplifier
Amplifier Power	350 Watts RMS < .1% THD @ 4 Ohms, 700 Watts peak , Direct Output225 Watts RMS < .1% THD @ 8 Ohms, 400 Watts peak , Direct Output350W - 25V/70V/100V < .1% THD Transformer Output
Minimum Load Impedance	Direct Output- 4 ohmsIsolated Outputs- 2 ohms/25V, 16 ohms/70V 32 ohms/100V
HP Filter – Switchable	40Hz – 60 Hz
Overall Response	20 – 100 kHz Hz +/- 3 dB Direct, 30 Hz – 35kHz +/- .5 dB
Power Band WidthResponse	30 Hz - 65 kHz +0, -3 dB Direct30 Hz – 50 kHz +0, -3 dB Transformer
Inputs	Dual RCA Unbalanced/Single Euro Block Balanced
Maximum Input Sensitivity	175 mV for full output unbalanced /balanced/Variable
THD+ Noise	<.05% 20-20kHz below rated output power
S/N	>85 dB un-weighted
Damping Factor	>200
Input Impedance	20K unbalanced, 10K balanced
Protection Features	Soft Clipping Limiter (Switchable) , Short Circuit/Overload, DC offset protection,Thermostatic variable speed fan cooling, Thermal overload protection,Transformer thermal protection, Over current protection
Front Panel Indicators	Power/Standby, Clipping, Protection LEDs
Current consumption 120V	3A @ 8 ohms, 5.5A @ 4 Ohms Continuous Program
Operating Voltage	Switchable, 115VAC 60HZ @ 9A Max / 230VAC 50 Hz @ 4A Max
Dimensions (Overall)	19" W x 3 3/4" (w/feet) 3 1⁄2" (chassis) H x 13.3/4" D (2 standard RU)
Weight	29.5 lbs.

MA3501t

Install Instructions For:

MA3501t