Diamond Audio Technology 8
FL +
FL -
FR +
FR -
RL +
RL -
RR+
RR -
INPUT
FR
FL
SUB
RR
RL
C
F GAIN
GAIN
BYPASS
SUB GAIN
SUB
SLAVE
C SLAVE
F HP
C GAIN
SUB SONIC
FREQ
C HP
SUB
SONIC
R SLAVE
SUB INV
R GAIN
SUB LP
FREQ
R HP
SUB
LP
CROSSOVER
All Diamond Audio
D5
amplifiers employ one of the most flexible internal
crossover sections currently available in mobile audio. They feature second-
order 12dB/octave Butterworth filters. These filter networks sum to a flat
response at their -3dB break points. This results in a smooth and seamless
transition from one frequency band to the next. Butterworth filters provide
maximally flat frequency responses when compared to other filter structures.
All crossover controls are mounted on the signal input side of the amplifier.
The
D5 5.1
front, rear, and center crossovers are fixed highpass filters set at 80
Hz. Each of these crossovers has an individual network that can be defeated
by simple switch selection. When switched off, they are completely out of the
audio path. The sub channel crossover features fully selectable and adjustable
sub-sonic, 17 - 80 Hz, and lowpass, 60 - 250 Hz, filters. The sub channel
crossover also features a 180 degree phase inverter and gain bypass.
GAIN
This control matches the output voltage of the source unit or processor to the
amplifier inputs. Rotating this control to the “MIN” mark (counterclockwise)
configures your
D5
amplifier to accept input voltages as high as 5V RMS. This
control should be set as low as possible. The basic procedure for setting input
gains is as follows:
1.
Adjust all amplifier gain controls to just above the minimum setting
(fully counterclockwise).
2.
Using the highest quality source (usually CD) play some music and
slowly turn up the source unit until you can hear distortion. Now turn
down the volume until the distortion stops. This is your maximum
source unit level.
3.
Turn up the amplifier gain until audible distortion starts. Turn down
the gain to the point JUST BELOW the start of the distortion.
4.
Repeat step 3 for all channels on your
D5 5.1
.
GAIN BYPASS SELECT
Pushing this button “IN” bypasses the gain stage on the sub channels only.
This is used in systems with a pre-amp section before the sub channels or to
slave those channels to a master amplifier. Leaving this button “OUT” is the
default and uses those channels gain as a normal input level match.
