ADP 303 (serv.man3) - Harman Kardon Audio User Guide / Operation Manual. Page 12

Operation and Specifications

11

Output Level/Output lmpedance
MAIN L/R, CENTER, SURROUND L/R

1 kHz, 0 dB INPUT 

0~3.5 V/500 

Ω

SUBWOOFER

50 Hz, 0 dB INPUT 

0~9 V/500 

Ω

Input Impedance (RF, COAXIAL) 

75 

Ω

Frequency Response 
MAIN L/R, CENTER, SURROUND L/R (LARGE)

20 Hz–20 kHz 

0± dB

Filter Characteristics
MAIN L/R, CENTER, SURROUND L/R (SMALL)

H.P.F. 

fc=100 Hz, 12 dB/oct.

SUBWOOFER

L.P.F. 

fc=100 Hz, 24 dB/oct.

1. Turn the power on. 

å

2. Select the appropriate input source 

∂

(i.e., “RF” for a laser disc player,

“Coax” or “Optical” for data stream
sources such as DSS, DVD or HDTV).

3. Start playback source equipment. 

4. Note that the AC-3 indicator will 
illuminate when the unit is locked to the
digital signal and is functioning
properly.

5. Depending on the equipment in your
specific home theater installation, you
will use either the volume control on
your AVR80 or “6 Channel Equipped” 

receiver, or the front panel volume
control on the ADP303 

î

. Choose the

option below that describes your system.

• When the ADP303 is used with the
AVR80 or another product with a 6
Channel Direct mode make the
appropriate input selection on the
receiver. Make certain that the ADP303
front panel volume control 

î

is set to

the 12 o’clock position. Use the volume
control or the remote for the AVR80,
AVI250 or other device to control system
volume levels.

• When using the ADP303 with any
other product, the volume is controlled
by the front panel volume control on the
ADP303 

î

while listening to an AC-3

source

6. To temporarily silence the ADP303’s
audio output press the MUTE button.
Press it again to return to normal
volume levels.

7. To take the ADP303 out of the system
when it is used with products other than
those with a 6 Channel Direct mode,
(e.g., where it is installed between the
preamp/receiver and power amplifiers
and no AC-3 source will be listened)
press the BYPASS button. Note that the
ADP303 will automatically revert to the
BYPASS mode when it is turned off. Use
of the Bypass control is not required
when the ADP303 is used with products
such as the AVR80 or AVI250 that feature
a 6 Channel Direct input.

Total Harmonic Distortion
MAIN L/R, CENTER, SURROUND L/R (1 kHz)  0.01% or less
SUBWOOFER (50Hz) 

0.1% or less

Signal to Noise Ratio (IHF - A) 

98 dB

Channel Separation (1 kHz) 

80 dB 

Power Consumption 

30 W

AC OUTLET: UNSWITCHED 

200 W max.

Dimensions (W/H/D) 

444 mm x 85 mm x 278 mm
17-3/8 in x 3-3/8 in x 10-7/8 in

Weight 

4.2 kg. (9.4 lbs.)

24093_ADP 303 Eng.  27/02/1998 10:34  Side 12