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QUAD AMPLIFIER
13
QD-4240/4480/4960, QX-4960
Use the following formula to determine the needed fuse rating:
Po = I 2 R I =
P0 [W]: Speaker’s input capacity (RMS)
R [Ω] : Speaker’s nominal impedance
I [A] : Required fuse rating
For example: If the speaker’s input capacity is 100W, with 8Ωimpedance.
I = = 3.5
The required fuse rating is 3.5A.
- SPEAKER CABLE
Always use the heaviest-duty (lowest gauge) speaker cable available. The terminals can accommodate very
thick speaker cable.
- MAINTAINING PROPER POLARITY
It is very important to wire your speaker connectors consistently at each end of each cable, in order to
maintain proper polarity. All quality cables are manufactured with clear markings to identify the different
conductors – normally by color-coding, printed markings, or textured ribbing on the cable’s jacket material.
Always make certain to correctly wire your connections so that tip is connected to tip, and sleeve to sleeve.
Failing to do so will cause your speakers to operate out of phase, resulting in significantly reduced low-
frequency output from your system.
- RACK MOUNTING YOUR AMPLIFIER
The QD-4240/4480/4960, QX-4960 intakes cool air through the front panel and exhausts warm air
through the rear panel. When mounting in a portable equipment rack, maintain adequate ventilation by
making certain the front and rear panels are not obstructed.
Po
R
100
8
PUSH PUSH
PUSH PUSH
CHANNEL 1
CHANNEL 2
OUTPUT
CHANNEL 4
INPUT
CHANNEL 3
PUSH TO RESET
10A / 250V
BRIDGEBRIDGE
CH 2(4 ~ 8)CH 4(4 ~ 8)
CH 1(4 ~ 8)CH 3(4 ~ 8)
(8~16) (8~16)
X-OVER 10
X-OVER
BYPASS
STEREO
BRIDGE PARALLEL
X-OVER 10
X
X-OVER
BYPASS
STEREO
BRIDGE PARALLEL
X-OVER FREQUENCY X-OVER FREQUENCY
BALANCED
OdBm
BALANCED
OdBm
BALANCED
OdBm
BALANCED
OdBm
60Hz
130 190
220
160
80
250Hz 60Hz
130 190
220
160
80
250Hz
~AC INPUT
230V 50Hz, 770W
HIGH HIGH
LOW LOW
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OC03
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