Diamond Audio Technology 8
left
righ
t
1/2
gain
3/4 gain
aux sel
3/4
mo no
gain
bypass
2
chn
4 chn
H/Pfreq
3/4
H/P on
H/P X 1
0
L/Pfreq.
L/P on
1
+
1
-
2
+
2
-
3 +
3 -
4+
4 -
2
3
4
1/2
1/2
3/4
1/2
3/4
3/4
1/2
1/2
3/4
1
aux out
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 side of the amplifier. The
D5
600.4 crossovers are continuously variable, lowpass from 50Hz to 5kHz,
highpass from 15Hz to 1.5kHz or 1.5kHz to 15kHz using x10 button. Each pair
of channels has an individual network that can be configured to Highpass,
Lowpass, Bandpass or All-pass by simple switch selection. When switched off,
they are completely out of the audio path. The Ch 3/4 crossover also features
a mono/stereo switch that when pushed in to mono will series the two
crossovers to a fourth-order 24dB/octave filter for subwoofer systems.
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 amplifiers in your system.
AUX. OUTPUT SELECT
Pushing this button “IN” selects the Aux. outputs to use the crossover settings
on the amplifier. Leaving this button “OUT” bypasses the crossover and selects
the Aux. outputs to run full range.
