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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

Summary of Contents for D6 300.4

Page 1: ...ith new or remanufactured product for as long as the amplifier is in its original installation Damage or failure caused by any of the following is not covered under this warranty policy negligence improper use abuse product modification unauthorized repair attempts accident acts of God misrepresentations by DAT retailers and improper inadequate packaging during return shipping Warranty is void if ...

Page 2: ...t speaker systems exceed that level Please exercise restraint and protection during their operation in order to preserve your ability to enjoy their fidelity for years to come CONTENTS Page 3 Specifications RMS Power Page 4 Physical Dimensions Appearance Features Page 5 Professional Installation Mounting Page 6 DC Connections Page 7 DC Connections Power and Ground Page 8 DC Connections Amp Current...

Page 3: ...s Advanced Protection Circuitry SPECIFICATIONS Fuse Rating 60 A 90 A 120 A 160 A 90 A DC Range 11 14 5 V 11 14 5 V 11 14 5 V 11 14 5 V 11 14 5 V Input Range 0 2 5 V 20k ohms 0 2 5 V 20k ohms 0 2 5 V 20k ohms 0 2 5 V 20k ohms 0 2 5 V 20k ohms Channel Separation 80 dB min 80 dB min n a n a 80 dB min THD 0 03 0 03 0 1 0 1 0 03 0 05 sub Signal to Noise Ratio 100 dB 100 dB 80 dB 80 dB 100 dB Model D6 3...

Page 4: ...uming loads including the audio system Alternator output battery capacity and power demand of all electrical loads and systems must be matched as ideally as possible so the entire system is reliable and trouble free in operation PROFESSIONAL INSTALLATION To achieve maximum performance and life time warranty coverage see warranty statement Diamond Audio strongly recommends that a factory authorized...

Page 5: ...ff or for SPL competitions where high sound pressure levels are generated for short periods of time In which large battery racks are needed to provide the necessary current demanded by the many amps used D6 Reference Series Amplifiers are capable of reproducing concert level volumes with incredible accuracy Care must be taken to ensure that your vehicle is capable of supplying the voltage and curr...

Page 6: ...ers provide maximally flat frequency responses when compared to other filter structures Crossovers Turn on Remote Locate the terminal labeled REMOTE between the ground and 12V power connection points on the end of the amplifier Your source unit should have a wire in its harness labeled REMOTE or AMP TURN ON Some source units come equipped with a Power Antenna lead only This should also work Run th...

Page 7: ...se 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 N...

Page 8: ... it is set on the amplifier Max all the way clockwise on the module is set to whatever the gain on the amp is set to Note Old D5 600 11200 1 remote gains do not work with D6 amplifiers Remote Gain Although the D6 1000 1 and 1500 1 amplifiers have two sets of outputs they are mono block amplifiers and the outputs can not be bridged The two sets of outputs are paralleled inside the amp to a single c...

Page 9: ...ounterclockwise 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...

Page 10: ...wise 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 distortio...

Page 11: ...and sub channels can all be slaved of the front channels inputs Simply push the appropriate button IN to slave that channel to those inputs You can also slave just the center and sub channels if you have a four channel input Slave Select Pushing this button IN engages the sub sonic filter on the sub channels Pushing this button OUT will bypass the filter Subsonic On Off Turning this control sets t...

Page 12: ...e is no sound coming from one channel check all signal connections and sources for that channel D6 1000 1 1500 1 ONLY If the Red LED is lit the amp is in protection disconnect power and reset amp If protection LED lights again check all connections for shorts especially speaker connections If the amp still will not work correctly please return to the authorized Diamond retailer you bought the ampl...

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