7
Features and Specifications:
DD1
DD1--1200
1200
1
Ω
Ω
Stable
Yes
Mono-bloc
Yes
Terminals
Gold plated RCA jacks, speaker and power terminals
Soft Start
Yes
Inputs
RCA line level inputs
Crossover
Low Pass, 24dB/Octave, 50Hz – 250Hz
Subsonic
Filter
15Hz – 50Hz, 24dB/Octave
Bass Boost
Variable, Remote, 0 to 18dB @ 45Hz
Protection
Thermal, short-circuit, DC offset, fuse
Power
Supply
Pulse Width Modulated, MOSFET power supply,
+12V/Negative Ground
Power, 4
Ω
Ω
,
400 Watts RMS <0.1% THD
Power, 2
Ω
Ω
,
700 Watts RMS <0.3% THD
Power, 1
Ω
Ω
1200 Watts RMS <0.3% THD
Signal to
Noise Ratio
>90dBA
Frequency
Response
20Hz – 250Hz
Input
Sensitivity
200mV – 4V
Fuse
3 X 40A
These specifications are subject to change in the continuing effort to
improve the product.
8
Troubleshooting:
Condition
Possible Cause
Possible Solution
No sound
Low or no remote turn
on voltage, or no remote
turn on connection
Check the remote turn on
connection and the voltage at
the amplifier and source unit
Blown fuse(s)
Check all system fuses
Wiring problems
Recheck all connections
Check for short circuits
Blown speakers
Check speakers on another
amplifier
Amplifier
shut down
Protection circuit
protecting against
overheating or overload
Check for adequate ventilation
Check load impedance
Check speaker wiring for short
to the vehicle chassis
Reduce input level
Distortion
Input level not properly
adjusted
Speaker damage
Readjust amplifier input level
Check speakers on another
amplifier
Poor bass
response
Speakers out of phase
Recheck speaker wiring
Reverse polarity of one speaker
Ticking
noise
Radiated noise from
spark plug wires
Reroute amplifier input wiring
Install a noise filter
Whining
noise
Alternator noise caused
by poor grounding of
amplifier, source, other
component, battery, or
alternator
Check all ground connections
Install a noise filter on the
source unit’s power cable
Install a coupling transformer
in the signal path to improve
ground isolation for the signal
path
