TECHNOLOGY
HD-75
HIGH POWERED AMPLIFIER
SPECIFICATIONS
WARRANTY
Power Output: 75 Watts RMS per channel @ 8 Ohms
150 Watts RMS per channel @ 4 Ohms
300 Watts RMS per channel @ 8 Ohms
Frequency Response: 20Hz to 50KHz
Total Harmonic Distortion: Less than .03%
Input Sensitivity: 0.75V
Input Impedance: 10kohms (balanced)
Damping Factor: Greater than 100
Power consumption: 600W
Weight: 8.2kg.
The HD-75 features substantial Protection Circuitry to insure stability and reliability against over curent and
overheating. In addition, turn on delay and DC detection circuitry is provided to protect the loud-speaker.
The HD-75 can be used for mono operation by selecting the mode switch. To confirm the operating status, LED
displays of protection, clip, and signals are provided on the front panel. Separate level controls are provided for channel one
and two input. Clockwise rotation of the controls increases the volume level.
Output terminals are dual five-way binding posts and Input terminals are both balanced XLR and phone jacks.
A large heat sink is provided to ensure cool operation. If the amplifier is rack mounted, we recommend that you keep the rear
of the rack open in order to release heat. The HD-75 also comes with a special jumper cable for running unbalanced to
balanced inputs.
Wiring diagrams for both stereo and mono configurations are on the back of this page
Your AUDIOPLEX TECHNOLOGY HD-75 is covered by a LIFETIME warranty against any defects in
workmanship and materials. Any defects will be remedied without charge for labor or parts.
Damage ncurred by shipping or by accident is not considered to be a defect, and not covere by this warranty.
AUDIOPLEX TECHNOLOGY is not responsible for defective operation caused by abuse or by modification or service by
any unauthorized person or agency.
The unit must be properly installed and operated according to instructions for the warranty to apply. Any necessary
servicing must be done by AUDOPLEX TECHNOLOGY. The unit must be returned expenses prepaid, with written
authorization from the company. The product must be shipped with the proof of purchase and in the original carton and
packing materials to avoid damage.
This warranty gives you specific legal rights. You may have other rights which vary from state to state.
INSTALLATION MANUAL
1999 - 4/22/99
WIRING DIAGRAMS
CHANNEL 1 CHANNEL 2
AC INPUT
OUTPUT
CHANNEL 1
CHANNEL 1
STEREO
BRIDGED
MONO
CHANNEL 1 CHANNEL 2
AC INPUT
OUTPUT
CHANNEL 1
CHANNEL 1
STEREO
BRIDGED
MONO
CHANNEL 1 CHANNEL 2
AC INPUT
OUTPUT
CHANNEL 1
CHANNEL 1
STEREO
BRIDGED
MONO
MODE SELECTOR
AC POWER CORD
INPUT CONNECTORS
OUTPUT TERMINALS
AUDIO MIXER
BRIDGED MONO OPERATION
1.) Set mode selector to bridged mono
2.) Connect a mono input signal to channel one input jack.
3.) Connect the speaker load to the two red terminals of each channel,
please confirm the (+) terminal of speaker to channel one and the (-) terminal
to channel two.
4.) Do not use the black terminals of each channel.
5.) Please note to connect the speaker impedance 8 Ohms or above.
AUDIOPLEX TECHNOLOGY
404 GWH P.O. BOX 440 MELVIN VILLAGE, N.H. 03850
800-257-2077 603-544-8601 FAX: 603-544-8901
www.audioplex.com
1999 - 4/22/99
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