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
turndown 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.
SUBSONIC FREQUENCY
Turning this control sets the Subsonic filter point from 15Hz (fully
counterclockwise) to 40Hz (fully clockwise).
PHASE IN/OUT
Pushing this button “IN” engages the Phase switch, putting the amp 180
degrees out of phase. Pushing this button “OUT” keeps the amp in phase. In
some vehicles this can help with the timing and overall response of your
system. If your woofers are not in phase with the rest of the system it can
cause bad timing and gaps in the pass band. Unlike some Class “D” amplifiers,
this option does not allow you to use two
D5
Class “D’s” as one channel.
Trying this can cause damage to your amplifiers and woofers.
LOWPASS FREQUENCY
Turning this control sets the Lowpass crossover point from 50Hz (fully
counterclockwise) to 250Hz (fully clockwise).
CROSSOVER FREQUENCY DIAGRAMS
Subsonic
Lowpass
40 Hz
15 Hz
27.5 Hz
17.5 Hz
20 Hz
22.5 Hz
25 Hz
30 Hz
32.5 Hz
35 Hz
37.5 Hz
11:00
10:00
9:00
8:00
12:00
1:00
2:00
3:00
4:00
250 Hz
50 Hz
150 Hz
70 Hz
90 Hz
110 Hz
130 Hz
170 Hz
190 Hz
210 Hz
230 Hz
11:00
10:00
9:00
8:00
12:00
1:00
2:00
3:00
4:00
9 Diamond Audio Technology
