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©2005 Diamond Audio Technology. All Rights Reserved
©2005 Diamond Audio Technology. All Rights Reserved
Highpass Freq.
Turning this control sets the Highpass crossover point from 15 Hz (fully counterclockwise)
to 1.5 kHz (fully clockwise). This can be used as a subsonic filter if needed.
Highpass On/Off
Pushing this button “IN” engages the Highpass filter. Pushing this button “OUT” will
bypass the filter.
Highpass Multiplier Select
Pushing this button “IN” multiplies the highpass crossover frequencies, 1.5 kHz to 15
kHz. Leaving the button “OUT” uses the highpass filter normally. (see highpass
frequency section above for frequency points)
Lowpass Freq.
Turning this control sets the Lowpass crossover point from 50Hz (fully counterclockwise)
to 5kHz (fully clockwise).
Lowpass On/Off
Pushing this button “IN” engages the Lowpass filter. Pushing this button “OUT” will
bypass the filter.
Gain Bypass Select
Pushing this button “IN” bypasses the gain stage on the amplifier. This is used in
systems with a pre-amp section before the amplifier or to slave the amp to a master
amplifier. Leaving this button “OUT” is the default and uses the amplifiers gains as a
normal input level match.
Ch 3/4 Mono Select
Pushing this button “IN” combines the input signal to create a mono signal of channels
3/4 for use with subwoofer systems. Leaving the button “OUT” defaults the amp to
normal stereo mode.
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 the 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 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
Leaving this button “OUT” selects the Aux. outputs to use the crossover settings on the
amplifier. Pushing this button “IN” bypasses the crossover and selects the Aux. outputs
to run full range.
Ch 3/4 Input Select
Pushing this button “IN” selects the 2 channel mode, meaning that channels 3/4 use the
channel 1/2 inputs. Leaving this button “OUT” uses the channel 3/4 input in 4 channel
mode.
All crossover controls are mounted on the signal side of the amplifier. The D6300.4/600.4
crossovers are continuously variable, lowpass from 50Hz to 5kHz, highpass from 15Hz to
1.5kHz or 1.5kHz to 15kHz using multiplier 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.
Crossovers (cont.)
D6 300.4/600.4
D6 300.4/600.4
