Alpine 3555 User Manual

FEATURES
DC-TO-DC SWITCHING MODE POWER SUPPLY
Provides excellent power output throughout the audio bandwidth (20 Hz to 20 kHz).
its soft clipping characteristics ensure superb transient response and musicality.
FULLY DISCRETE, COMPLEMENTARY OUTPUT CIRCUITRY
For excellent reliability, superb sonic performance and high current capability for
accurate transient response.
INDEPENDENT, CONTINUOUSLY ADJUSTABLE GAIN CONTROLS FOR CH1/2
AND CH3/4
Allow different level settings for both pairs of channels.
GOLD-PLATED RCA INPUT CONNECTORS
For most accurate signal transmission and lowest possible loss. Gold-plated terminals
are immune to signal deterioration caused by corrosion in the connectors that can
develop over time.
GOLD-PLATED, SCREW-DOWN POWER AND SPEAKER TERMINALS
For high definition, minimum loss power transfer and oxidization resistance.
HIGH PERFORMANCE, LOW NOISE, AUDIOPHILE QUALITY ACTIVE AND
PASSIVE COMPONENTS
For best possible performance and consistency from unit to unit.
THIRD-ORDER, (18 dB PER OCTAVE) CAPACITIVE/INDUCTIVE POWER SUPPLY
INPUT AND OUTPUT FILTERING
Prevents radio frequency interference (RFI) and immunity to system noises (such as
alternator whine).
EXTRA HEAVY DUTY CONSTRUCTION
Glass-epoxy printed circuit boards and separate high current power transfer bus-bars
for primary voltage and ground connections inside the amplifier.
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Alpine 3555 Specifications

Power Output

4-channel power output (max)	120W x 4
4-channel power output (into 4 ohms with 0.04% THD)	50W x 4
3-channel power output (into 4 ohms with 10% THD)	100W x 2 and 200W x 1
2-channel power output (into 4 ohms with 10% THD)	200W x 2

Audio Specifications

frequency response	10 Hz to 50 kHz (+0, —1 dB)
signal-to-noise ratio	105 dB (referenced to rated power)
input sensitivity (for rated power output)	100mV to 2V (500 mV at center detent)
input impedance	10k ohms Min.
speaker impedance	4 or 2 ohms (stereo), 4 ohms (bridged)
active dividing network frequency and slope	80Hz, 18 dB per octave
acoustic compensation effect	+5 dB at 40 Hz, —1 dB at 150 Hz

Power

power requirement	11 — 16V DC Negative Ground

Weight and Dimensions

dimensions (W x H x D)	263mm x 55mm x 300mm
dimensions (W x H x D in inches)	10-3/8" x 2-3/16" x 11-4/5"
weight	4 kg (8 Ibs. 13 oz)