1. Do not spill any liquids on the equipment and do not drop any objects through the ventilation slots in
the equipment.
2. The equipment may be used in dry rooms only.
3. The equipment may be opened, serviced, and repaired by authorized personnel only. the equipment
contains no user-serviceable parts.
4. Before connecting the equipment to power, check that the AC mains voltage stated on the supplied
power supply is identical to the AC mains voltage available where you will use the equipment.
5. Operate the equipment with the supplied power supply with an output voltage of 12 VDC. Using
adapters with an AC output and/or a different output voltage may cause serious damage to the unit.
6. If any solid object or liquid penetrates into the equipment, shut down the sound system immediately.
Disconnect the power supply from the power outlet immediately and have the equipment checked by
AKG service personnel.
7. If you will not use the equipment for a long period of time, disconnect the power supply from the
power outlet. Please note that the equipment will not be fully isolated from power when you set the
power switch to OFF.
8. 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.
9. To avoid hum or interference, route all audio lines, particularly those connected to the microphone
inputs, away from power lines of any type. If you use cable ducts, be sure to use separate ducts for
the audio lines.
10.Clean the equipment with a moistened (not wet) cloth only. Be sure to disconnect the power supply
from the power outlet before cleaning the equipment! Never use caustic or scouring cleaners or clean-
ing agents containing alcohol or solvents since these may damage the enamel and plastic parts.
11.Use the equipment for the applications described in this manual only. AKG cannot accept any liabili-
ty for damages resulting from improper handling or misuse.
1. The power supply will draw a small amount of current even when the equipment is switched off. To
save energy, disconnect the power supply from the power outlet if you will leave the equipment
unused for a long period of time.
2. When scrapping the equipment, separate the case, circuit boards, and cables, and dispose of all com-
ponents in accordance with local waste disposal rules.
3. The packaging of the equipment is recyclabe. To dispose of the packaging, make sure to use a col-
lection/recycling system provided for that purpose and observe local legislation relating to waste dis-
posal and recycling.
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 audi-
ence!
The HPA 4000 is a headphone amplifier with eight stereo line inputs and one stereo output. It allows you to
monitor the output signal of any one of eight SR 4000 receivers on headphones. AKG offers suitable head-
phones for every application.
You can use the HPA 4000 as a standalone unit or install it in a 19" rack using the supplied Rack Mounting
Kit.
1 HPA 4000 headphone
amplifier
Check that the packaging contains all of the components listed above. Should anything be missing,
please contact your AKG dealer.
K 141
Monitor
K 141
Studio
HPA 4000
Downloaded from
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1 in-line power supply
8 audio cables with
(if checked on the packaging)
1/4" TRS jack plugs
K 171
Studio
K 240 DF
Studio
Monitor
manuals search engine
1 Safety and Environment
1 Rack Mount Kit
K 240
K 271
Monitor
Studio
K 240
Studio
1.1 Safety
1.2 Environment
2 Description
2.1 Introduction
Refer to figs. 3 and 4. See SR 4000
manual for details.
2.2 Unpacking
2.3 Optional Accessories
5