BALANCE K 122 IR - Wireless headphones AKG - Free user manual and instructions

USER MANUAL BALANCE K 122 IR AKG

User Instructions . p. 7

Please read the manual before using the equipment!

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

Shielded cables and I/O cords must be used for this equipment to comply with the relevant FCC regulations.

Changes or modifications not expressly approved in writing by AKG Acoustics may void the user's authority to operate this equipment.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

1 Introduction

Thank you for purchasing an AKG product. Please take a few minutes to read the instructions below carefully before operating the equipment. Please keep the Manual for future reference.

2 Safety and Environment

2.1 Safety

1. Do not spill any liquids on the equipment and do not drop any objects

through the ventilation slots in the equipment.

1. The equipment may be used in dry rooms only.
2. The equipment may be opened, serviced, and repaired by authorized personnel only. The equipment contains no user-serviceable parts.

3. Before connecting the equipment to power, check that the AC mains voltage stated on the supplied AC adapter is identical to the AC mains voltage available where you will use the equipment.

4. To power the equipment, use the supplied AC adapter with its 12 VDC output only. Using adapters with an AC output and/or a different output voltage may cause serious damage to the unit.

5. If any solid object or liquid penetrates into the equipment, shut down the sound system immediately. Disconnect the AC adapter from the power outlet immediately and have the equipment checked by AKG service personnel.
6. Prior to storing the transmitter without using it for a long period of time, disconnect the AC adapter from the power outlet. Please note that as long as the AC adapter is plugged into a power outlet, the transmitter will not be completely separated from power when you switch it off.
7. Do not place the equipment near heat sources such as radiators, heating ducts, or amplifiers, etc. and do not expose it to direct sunlight, excessive dust, moisture, rain, mechanical vibrations, or shock.
8. Clean the equipment with a moistened (not wet) cloth only. Be sure to disconnect the AC adapter from the power outlet before cleaning the equipment! Never use caustic or scouring cleaners or cleaning agents containing alcohol or solvents since these may damage the enamel and plastic parts.
   10.Use the equipment for the applications described in this manual only. AKG cannot accept any liability for damages resulting from improper handling or misuse.

2.2 Environment

1. The AC adapter will draw a small amount of current even when the equipment is switched off. To save energy, disconnect the AC adapter from the power outlet if you will leave the equipment unused for a long period of time.
2. When scrapping the equipment, sep

arate the case, circuit boards, and cables, and dispose of all components in accordance with local waste disposal rules.
3. The packaging of the equipment is recyclable. To dispose of the packaging, make sure to use a collection/recycling system provided for that purpose and observe local legislation relating to waste disposal and recycling.

3 Unpacking

T 122 IR transmitter

K 122 IR headphones w/battery pack AC adapter

AK 2 connecting cable

SCART/RCA adapter

2 replacement ear pads

Mini to 1/4" stereo adapter jack

1 replacement battery for headphones

Please check that the packaging contains all of the items listed above. Should any item be missing, please contact your AKG dealer.

3.1 Replacement Battery Packs, Separate Headphones

The headphones will only operate with the supplied dedicated battery packs.

To order more battery packs, please contact your AKG dealer.

You can also order separate K 122 IR headphones from your AKG dealer.

3.2 Replacement Ear Pads

To mount the supplied, more solid replacement ear pads, refer to fig. 9:

1. Remove the ear pads (9) from the speaker capsules.
2. Press the replacement ear pads (10) onto the speaker capsules as shown in fig. 9.

4 Placing the Transmitter

Refer to fig. 1.

The T 122 IR transmitter uses infrared waves to transmit the audio signal to the receiver in the K 122 IR headphones. Infrared waves propagate in the same way as visible light and cannot penetrate walls or doors. Therefore, place the transmitter where you can see it from all over the room.

5 Connecting the Transmitter

Check that the AC mains voltage stated on the AC adapter is identical with the AC mains

voltage in your area. Operating the AC adapter off a different AC mains voltage may damage the unit.

Refer to fig. 2 A: audio source with headphone output (" 串 " or "PHONES");

fig. 2 B: audio source with "LINE OUT" or "REC OUT" jacks;
fig. 2 C: audio source with SCART connector (A ... SCART adapter).

1. Before connecting the transmitter to your audio source (TV set, radio, hi-fi system, etc.), switch power to the audio source off.
2. Connect the transmitter to your audio source using the supplied AK 2 connecting cable (white = left-hand channel, red = right-hand channel).
3. Plug the cable on the supplied AC adapter into the DC 12 V jack on the transmitter rear panel.
4. Plug the AC adapter into a convenient power outlet.

The six infrared radiators on the transmitter front panel will be lit.

6 Charging Battery Packs

Before you can use the headphones, you will need to charge the battery pack inside the headphones. We recommend charging the supplied replacement battery pack at the same time.

Refer to fig. 3.

1. Place the headphones (1) on the transmitter (2).
2. Insert the supplied replacement battery pack (3) into one of the charging slots in the transmitter side panels.

The charging process will start automatically. The appropriate indicator LED(s) (4a or 4b for the replacement battery packs, 4c for the battery pack inside the headphones) will be lit red. The two battery packs will be fully charged in approx. four hours. The indicator LEDs (4) will remain lit.

You can leave the headphones on the transmitter and the battery packs inside the charging slots without risking to overcharge the batteries.

Note: The charging slots on the transmitter allow you to charge two battery packs along with the battery pack inside the headphones (see fig. 3/1).

7 Powering Up

Before switching power to your system on, please note:

• Using headphones at high volume levels, particularly for extended periods of time, may damage your hearing.
• Operating switches on your hi-fi system or connecting the transmitter to your audio source may cause clicks, which at high volume settings may affect your hearing. Therefore, be sure to set the volume control on the headphones to minimum (see fig. 6) before switching between different sources (tuner, turntable, CD player, etc.) or connecting the transmitter.
• Interference caused by other transmitters using the same frequencies is beyond AKG's control.
• Remove the headphones from the transmitter.
• Switch power to your audio source (and/or hi-fi system) on.
• The transmitter will switch on automatically. If a battery pack is being charged inside the transmitter, the appropriate charging LED will remain lit red.

Note: If no signal arrives at the transmitter input for five minutes, the transmitter will switch off automatically and the six infrared radiators will go out.

1. Put the headphones on referring to fig. 4.

The headphones will switch on automatically.

When putting the headphones on, make sure the volume control (6) will be on your right so the infrared sensor on the headphones will "see" the transmitter and receive the transmitter signal.

Remember that you can only receive the transmitter signal where you can see the transmitter front panel (see fig. 5).

1. Refer to fig. 6. Set the channel selector (5) to stereo mode (center position) or, for bilingual programs, to channel 1 (left/language 1) or channel 2 (right/language 2) as desired.
2. Use the volume control (6) to set the desired volume level.
3. Refer to fig. 7. Should the sound be louder in one speaker than it is in the other, turn the balance control (7) to the left or right to the point that the sound is equally loud in both speakers.

The balance control (7) is located on the headphone rear panel. We therefore recommend taking the headphones off to set the left/right balance.

8 Powering Down

1. Take the headphones off.

The headphones will switch off automatically.

1. Switch power to your audio source off.

The transmitter will switch off automatically approx. five minutes after you switched off the audio source.

Note: The charging function on the transmitter will remain in standby mode so you can charge battery packs at any time.

9 What to Do if...

...the headphones remain silent:
- Switch power to your audio source on and turn the volume control (6) on the headphones up. If this does not help, insert a fully charged battery pack into the headphones.
- If the output level control on your audio source is at zero, turn the output level control up.
Refer to fig. 4. Put the headphones on making sure the volume control (6) will be on your right.
Refer to fig. 5. Go to a place where you can see the transmitter front panel.
...you hear unwanted noise (hiss) in the headphones:
Refer to fig. 5. Go to a place where you can see the transmitter front panel.
- ...the sound becomes quieter or distorted:
- Refer to fig. 8: Replace the battery pack in the headphones with the fully charged replacement battery pack. Insert the dead battery pack into one of the charging slots. The battery pack will be charged automatically.

10 Cleaning Ear Pads

Clogged ear pads may affect the sound quality.

1. Remove the ear pads.
2. Wash the ear pads in sudsy water.
3. Allow the ear pads to dry completely and replace them on the speaker capsules.

11 Specifications

System

Modulation:	FM
Carrier frequencies:	left channel: 2.3 MHz right channel: 2.8 MHz
T 122 IR Transmitter
Power requirement:	12 VDC, 200 mA
Max. range:	approx. 43 ft. (13 m) / 700 sq.ft. (65 m2)
Weight:	5.5 oz. (156 g)
K 122 IR Headphones
Type:	open-back, dynamic
Audio bandwidth:	30 Hz to 18 kHz
Max. sound pressure level:	approx. 115 dB
Electrical THD:	<2%
Battery life:	approx. 5 hours
Power supply:	2.4 VDC (dedicated NiMH battery pack)
Weight:	approx. 2.1 oz. (60 g)

This product conforms to the standards listed in the Declaration of Conformity. To order a free copy of the Declaration of Conformity, visit http://www.akg.com or contact [e-mail]

1 Introduction

H A Harman International Company

AKG Acoustics GmbH

Bodenseestraße 228, D-81243 München/GERANY, Tel: [phone], Fax: [phone], www.akg.com/de, e-mail: [e-mail], Hotline: [phone], [e-mail]

AKG ACOUSTICS, U.S.

914 Airpark Center Drive, Nashville, TN 37217, U.S.A., Tel: [phone], Fax: [phone], www.akgusa.com, e-mail: [e-mail]

For other products and distributors worldwide see our website: www.akg.com