15
16
©2005 Diamond Audio Technology. All Rights Reserved
©2005 Diamond Audio Technology. All Rights Reserved
Crossover Freq. Diagrams
Subsonic
Lowpass
Pushing this button “IN” engages the slave circuitry of the amplifier. The amplifier will
no longer accept signal from it’s main RCA inputs, it will only except signal from a
master D6 mono block amplifier through the SLAVE IN RCA input. This button also
bypasses the gain on the amplifier which is controlled by the master amplifier. When
using multiple amplifiers in a “daisy chain,” all amplifiers after the master must have
this button pushed “IN” for the system to work correctly. With this button “OUT” the
amplifier will run normally alone or as the master amplifier.
Master/Slave
Turning this control sets the Subsonic filter point from 15Hz (fully counterclockwise) to
40Hz (fully clockwise).
Subsonic Freq.
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.
Phase In/Out
Turning this control sets the Subsonic filter point from 50Hz (fully counterclockwise) to
250Hz (fully clockwise).
Lowpass Freq.
The D6 1000.1 and 1500.1 feature fouth-order 24dB/octave lowpass and second-order
12dB/octave subsonic 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 D6 1000.1 and
1500.1 crossovers are continuously variable, lowpass from 50Hz to 250Hz, and a
subsonic from 15Hz to 40Hz. The D6 1000.1 and 1500.1 also feature a phase switch that
when pushed in swaps the amplifier 180 degrees out of phase.
Crossovers
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 D6
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.
Gain
D6 1000.1/1500.1
D6 1000.1/1500.1
