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Power Ratings: The Sound Ordnance M-4100 is a four-channel
Class AB amplifier with an RMS power rating of 100 watts per channel into 4
ohms, and 135 watts per channel into 2 ohms. The amp can also be bridged into
a 4-ohm load for a power rating of 270 watts (x 2). Power ratings are measured
with an input power of 14.4 volts.
Crossovers: The M-4100 is equipped with both high-pass and
low-pass crossovers. The front channels (channels 1 and 2) and the rear channels
(channels 3 and 4) have separate crossovers. You can set the low-pass cutoff frequency
between 60Hz and 200Hz, and the high-pass cutoff frequency between 15Hz and 250Hz.
Separate 3-way switches let you select low-pass, high-pass, or full range operation
independently for the front and rear channels. The crossovers have a 12dB per octave
Bass Boost: The amplifier has separate bass boost controls
(labeled Bass EQ on the amp) for the front and rear channels. Each rotary control
is continuously variable from 0dB to +18dB and boost is centered at 45 Hz.
LED Indicators: The M-4100 features two LED indicators: a green
LED that illuminates when the amp is powered on, and a red LED that illuminates when
the amplifier is in protect mode due to overheating or a short circuit in the speaker
Removable End Caps: The end caps on the M-4100 are removable
with a 3mm Allen wrench (not supplied) to make it easier to attach the power and
Power Connections: The power and ground connections are set
screw terminals that will accommodate up to 4-gauge wire. (A 4-gauge amplifier
wiring kit is recommended.) The remote turn-on terminal is a set screw terminal
that will accept up to 8-gauge wire. A Phillips-head screwdriver (not supplied)
is required to tighten/loosen the terminals.
Speaker Connections: The speaker connections are set screw
terminals that will accommodate up to 8-gauge wire. A Phillips-head screwdriver
(not supplied) is required to tighten/loosen the terminals.
RCA Inputs: The amplifier features two pairs of stereo RCA
inputs for connecting your head unit--one pair for the front channels and one
pair for the rear channels. If your head unit only has one pair of preamp
outputs, you can feed all four amplifier channels with one pair of RCA plugs.
(You will lose front-to-back fader capability if you connect the amplifier with
one pair of RCA plugs.) The Input Mode switch allows you to select 4-channel or
2-channel inputs. The amplifier does not have preamp outputs.
Fuses: The M-4100 features two 40-amp ATC blade fuses.