1.1 Safety
1.2 Environment
2.1 Introduction
2.2 Unpacking
2.3 Optional Accessory
2.4 General Description
2.5 IVA - Individual Virtual
Acoustics
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 headphones are
rechargeable types.
4. Dispose of spent dry or rechargeable batteries conforming to local waste disposal rules. Never throw
batteries into the 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, vibrations, or impacts.
9. Never use alcohol, petroleum-based cleaners, or paint thinners to clean the headphone or transmitter
case.
10.If you do not use your transmitter for an extended period of time (e.g., when traveling), disconnect the
AC adapter from the AC outlet.
11.Also refer to section 4.1 Important Notes.
1. Be sure to dispose of used batteries as required by local waste disposal rules. Never throw batteries
into a fire (risk of explosion) or garbage bin.
2. When scrapping the equipment, remove the batteries, separate the case, circuit boards, and cables,
and dispose of all components in accordance with local waste disposal rules.
Dear Customer:
Thank you for purchasing an AKG product. This Manual contains important instructions for setting up and
operating your equipment. Please take a few minutes to read the instructions below carefully before
operating the equipment.
Please keep the Manual for future reference. Have fun and impress your audience!
If you have any questions beyond the scope of this Manual, do not hesitate to visit our website at:
http://www.akg.com
Your headphones system comprises the following components:
Check that the package contains all the parts listed above. If anything is missing, please contact your
AKG dealer.
External charger for headphones
This headphone system
• uses state-of-the-art UHF radio transmission technology;
• connects to any audio, video, TV set, or PC with a headphones or line output;
• provides perfect sound reproduction, full mobility, and signal transmission through walls and ceilings
over a distance of up to 330 feet (100 m);
• provides three selectable carrier frequencies and an "Autotuning" function that automatically tunes
the headphones to the transmitter frequency for optimum reception;
• uses proprietary IVA technology for exceptionally realistic, three-dimensional listening;
• features an integrated Dolby Surround Pro Logic decoder for perfect reproduction of hi-fi, TV, PC, or
video sound in Dolby surround format;
• provides a LOGIC7 decoder for adaptive simulation of up to eight loudspeakers with automatic adjust-
ment to the input signal format and full compatibility to Dolby Surround.
The HEARO 777 QUADRA systems let you share your listening enjoyment with other persons. You can
operate your transmitter with several headphones simultaneously. HEARO 777 headphones are also avai-
lable separately.
One drawback of headphone listening is the psychoacoustic phenomenon of "inside localization": the
orchestra seems to play inside your head rather than in the room. AKG developed a binaural audio
processing technique called IVA (Individual Virtual Acoustics) that models the way the head and pinnae
change the arriving sound waves (ear matching function). Thus, the various sound sources will seem to
be located outside your head even when you are using headphones.
11
2 Description
1 Safety and Environment
HEARO 777 QUADRA
1 pair of headphones
1 transmitter with integrated battery charger
2 stereo connecting cables with gold plated connectors: 1 RCA
cable, 1 jack cable (mini jack to 2 x RCA connectors)
1 mini jack to 1/4" jack adapter
1 9 VDC, 500 mA AC adapter for powering the transmitter
2 1.2 V AAA size NiMH rechargeable batteries for powering the
headphones (inside the headphones)
HEARO 777 QUADRA DELUXE
1 pair of headphones
1 transmitter with integrated battery charger
2 stereo connecting cables with gold plated connectors: 1 RCA
cable, 1 jack cable (mini jack to 2 x RCA connectors)
1 mini jack to 1/4" jack adapter
1 9 VDC, 500 mA AC adapter for powering the transmitter
2 1.2 V AAA size NiMH rechargeable batteries for powering the
headphones (inside the headphones)
2 velour replacement ear pads
