Diamond Audio D7 Reference Manual

LOWPASS ON/OFF
Pushing this button "IN" engages the Lowpass filter. Pushing this button
"OUT" will bypass the filter.
LOWPASS FREQUENCY
Turning this control sets the Lowpass crossover point from 50Hz (fully
counterclockwise) to 5kHz (fully clockwise).
HIGHPASS FREQUENCY
Turning this control sets the Highpass crossover point from 50Hz (fully
counterclockwise) to 5kHz (fully clockwise).
HIGHPASS ON/OFF
Pushing this button "IN" engages the Highpass filter. Pushing this button
"OUT" will bypass the filter.
X-OVER OUT
This crossover is fully independent. Signal can be parallel routed from
the CH 1/2 INPUTS (X-OVER INPUT SELECT button set to the "IN"
position) or be directly sent to this crossover via the AUX. X-OVER INPUT
RCA jacks (X-OVER INPUT SELECT button set to the "OUT" position).
This configuration allows the AUX. crossover to be used with a separate
amplifier not equipped with its own on-board crossover for the ultimate in
system flexibility.
Note: By engaging both Highpass and Lowpass filters and setting the desired
crossover points, a Bandpass filter can be created:
AUXILIARY CROSSOVER
Signal can be routed from the channel 1/2 INPUTS (X-OVER INPUT
SELECT button set to the "IN" position) or combined with the CH 3/4
INPUTS (X-OVER INPUT SELECT button set to the "OUT" position).
These signals can then be processed by the third (AUXILIARY) crossover.
This additional independent crossover can be used with a separate amplifier
not equipped with its own on-board crossover for the ultimate in
system flexibility.
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D7 CROSSOVER FREQUENCIES
Diamond Audio D7 Professional Reference Series Amplifiers feature fully
variable crossovers. The frequency control knobs (located in the tray on the
top of the amplifier) are labeled 50Hz when the knob is rotated fully counter-
clockwise (left) and 5kHz when rotated fully clockwise (right).
To make basic setting of the crossover frequencies a little easier, we've
come up with the following rotational diagram:
HIGHPASS/LOWPASS
FREQUENCY
Notice that the outer most circle of numbers (1:00, 2:00, etc.) represent
numbers as they appear on the face of a clock. The number underneath each
"hour" designation on the simulated clock face is the approximate crossover
frequency at that position.
BRIDGING
All pairs of Diamond Audio D7 amplifier channels are capable of being
bridged to a 4 Ohm mono output. Creation of the mono channel is accomp-
lished by using the left channel positive (+) output connection of the amplifier
for the speaker positive and the right channel negative (-) output connection
of the amplifier for the speaker negative.
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