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Multi-Channel Design: The Diamond Audio D600.4 is a 4-channel
amplifier, basically two independent 2-channel amplifiers built into one chassis.
Either side can be bridged so it can be used as a 4-channel, 3-channel, or 2-channel
amplifier. The amplifier is stable down to 2-ohms in stereo, and 4-ohms when bridged.
LEDs: Power and Protection LEDs are located on the side of
the amplifier. A blue Power LED illuminates when the amplifier is turned on and
operating normally. A red LED illuminates when any of the amplifier's protection
circuits engage; thermal, short circuit, or too low an impedance.
Gain: The front and rear input gain settings are independently
adjusted to match the incoming signal voltages. The input gains are continuously
variable from 150 mV to 5.0 V.
Bass Boost: The bass boost circuits, centered at 50 Hz, can
be independently applied to the front and rear channels. The adjustments are
variable from zero to +12 dB.
Crossover Switches: There are also independent crossovers
for the front and rear channels; each can be set to LP (low-pass), Full (full
range), or HP (high pass).
Crossover Frequency: You can independently select the crossover
frequency for the front and rear channel crossovers; each is continuously variable
from 50 to 250 Hz. The crossover slopes are 12 dB/oct.
Power Connections: The power and ground terminals are nickel
plated set screws and will accommodate up to 4-gauge wire. The remote turn-on
terminal will accept up to 8-gauge wire. 4mm (power and ground) and 2mm (remote)
Allen wrenches (not included) are required to tighten/loosen the terminals.
Speaker Terminals: The nickel plated set screw speaker terminals
will accept up to 8-gauge wire. A 2mm Allen wrench (not included) is required to
tighten/loosen the terminals.
RCA Inputs: The D600.4 features two pair of RCA input jacks
for easy connection to the source unit's line level output. The RCA input jacks
are nickel plated to resist signal degradation caused by corrosion.
RCA Outputs: The amplifier also features a pair of Pass-Thru
RCA jacks, providing a convenient method of daisy-chaining an additional amplifier
without running an extra set of RCA cables from the front of the vehicle. The RCA
output jacks are nickel plated and are unaffected by the D600.4's crossover and
bass boost circuitry.