Specifications

1 Introduction
Dear customer:
Thank you for purchasing an AKG product.
The K 306/K 406/K 506 AFC wireless headphone system is
based on advanced UHF transmission technology.
In order to make optimum use of the benefits of your K 306/
K 406/K 506 AFC, please take a few minutes to read the instruc-
tions below carefully before operating the equipment.
Please keep the manual for future reference.
2 Description
The K 306/K 406/K 506 AFC headphone system
• uses state-of-the-art UHF radio transmission technology;
• features an ”Autotuning” function that automatically tunes
the headphones to the transmitter frequency for optimum
reception;
• connects to any audio, video, TV set, PC, or notebook com-
puter with a headphones, line, or recording output;
•provides perfect sound reproduction, full mobility, and
signal transmission through walls and ceilings over a
distance of up to 330 feet (100 m) under ideal transmision
conditions (free field).
To share your listening enjoyment with other persons, you can
operate your transmitter with several headphones simultaneously.
K 306/K 406/K 506 AFC headphones are avail-
able separately.
3 Precautions
1. Operate the headphones with two AAA size
1.2 V rechargeable (supplied) or 1.5 V dry
batteries only.
2. Never try to charge dry batteries using the
transmitter’s charging feature.
3. Before charging the headphones batteries,
always make sure that the batteries in the head-
phones are rechargeable types.
4. Dispose of spent dry or rechargeable batteries conforming to
local waste disposal rules. Never throw batteries into fire.
5. Operate the transmitter with the supplied 9 VDC, 500 mA AC
adapter only. Check that the AC voltage stated on the AC
adapter is the same as that available in your country. Using
the transmitter with a different AC adapter voids the warranty.
6. Always switch the headphones OFF after use.
7. Never try to open the headphone or transmitter case. Refer
servicing to qualified service personnel only.
8. Never place the equipment near heat sources such as
radiators or electric heaters or expose it to direct sunlight,
excessive dust, humidity, rain, temperatures below freezing,
or impacts.
9. Never use alcohol, petroleum-based cleaners, or paint
thinners to clean the headphones or transmitter.
10. If you do not use your headphones system for an extended
period of time (e.g., when traveling), disconnect the AC
adapter from the AC outlet.
11. Also refer to section 7 Important Notes.
4 Unpacking and Optional Accessories
4.1 Unpacking
Your headphones system package contains the following
components:
K 306 AFC, K 406 AFC, or K 506
headphones
T 306 AFC, T 406 ATFC, or T 506 AFC
transmitter
Connecting cable with stereo mini jack
plug and L/R RCA plugs for connecting the
transmitter to your audio source
Stereo mini jack to 1/4” adapter jack
AC adapter for powering the transmitter (9 V
DC, 500 mA)
Two 1.2 V AAA size recharge-able bat-
teries: NiMh, 600 mAh (K 406 AFC,
K 506 AFC) or NiCd, 300 mAh (K 306 AFC)
for powering the headphones (inside the head-
phones)
If anything is missing, contact your AKG dealer immediately.
4.2 Optional Accessories
External charger (6 V DC, 100 mA) for sup-
plied or optional headphones (refer to fig. 12).
5 Controls
5.1 Headphones (Fig. 1)
1. POWER switch: switches power to the headphones On
and OFF.
2. Status LED: illuminates green to indicate power to the head-
phones is ON, and red to indicates the batteries inside the
headphones are being charged.
3a Charging contacts
3b Charging jack for optional external charger
4. Battery compartment (beneath the detachable ear pad)
5. AUTOTUNING switch: activates the automatic tuning
function
6. VOLUME control
6
Version Order Number
EU standard (except UK) 6000 H 1002
UK standard 6000 H 1003
US standard 6000 H 1004
Headphones Order Number
K 306 AFC 6000 X 1054
K 406 AFC 6000 X 1055
K 506 AFC 6000 X 1061