Alpine 3544 - Amplifier Features; 2;1 Channel Operation Modes; Status Monitor Indicator; Circuit Technologies

3544
Features
2/1 Channel Operation:
The 3544 can be used as a 2-channel stereo amplifier,
producing 150W per channel into 4 ohms, or 200W per
channel into 2 ohms. It can also be bridged for single
channel operation to produce a conservative 400W into
4 ohms. This amplifier can produce all these rated output
levels throughout the audio bandwidth (20 Hz to 20 KHz),
even at the low battery voltage of 12.5V.
Status Motor:
This indicator illuminates green when the amplifier is on
and operational. This light will turn orange if any
protection circuitry is activated. It can be used as a
troubleshooting aid should an installation problem
develop.
Duo-Beta Feedback Circuitry:
Duo-Beta is a patented and technologically advanced
form of negative feedback (error correction circuitry) . All
amplifiers require some form of negative feedback to
minimize distortion and stabilize the amplifier.
Too much feedback, however, increases the transient
intermodulation distortion (T.!.M.), decreases the
amplifier slew factor, and reduces its musicality. The
Duo-Beta circuitry supplies low negative feedback
throughout the audio frequency and very high negative
feedback at DC. This stabilizes the amplifier, removes
DC offset, and offers excellent total harmonic distortion
(T.H.D.) characteristics. It also provides low T.I.M.,
excellent slew factor, stability, and musicality.
No Current Limiting:
Current limiting circuitries used in conventional amplifiers
may cause premature clipping and inferior transient
response. Absence of current limiters in the audio section
ensures low T.1.M., excellent transient response, and
superb sonic quality.
S.T.A.R. Circuitry:
Alpine proprietary Signal Transit for Accurate Response
circuit topology improves sonic properties by reducing
interaction between different sections of the circuitry.
Optional Speaker Level Input Capability:
Using the optional Alpine accessory, 4311, this power
amplifier can be used with high or standard power head
units that do not have a preamp output. (Please see the
CONNECTIONS section for details.)
Input Mode Selector:
This switch allows the user to specify the input signal
entering the amplifier.
a. Stereo Mode:
Allows the right and left channel signals to reach their
designated amplifier channels. This mode provides a
stereo output or acenter channel common information
output (when used in the bridged configuration).
b. L (MONO) Mode:
Disables the right channel input connector and routes
the signal through the left channel input to all sections
of the amplifier. This mode can be used when a single
(mono) signal is amplified (either in stereo or bridged
operation).
c. L+R Mode:
Sums the right and left channel input signals and
routes the result to all sections of the amplifier. It can
be used in stereo or bridged operation to provide a
summed (mono) output.
Pulse-Width Modulation (PWM) 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 Complementary, Discrete Output Circuitry:
For excellent reliability, superb sonic performance and
high current capability to provide accurate transient
response.
Continuously Adjustable Input Gain Control:
For matching the 3544 with components with a preamp
output level other than 500 mV (the standard preamp
output level of Alpine equipmant). Also used to obtain
certain imaging characteristics or to compensate for
different speaker efficiencies.
Extra Heavy Duty Construction:
Glass-epoxy printed circuit boards for durability and
separate high current power transfer Dusbais for primary
voltage and ground connections insice the amplifier.
OFC Internal Wiring:
Oxygen free copper is exclusively used fer all internal
wiring. This ensures optimum signal tansfer and
resistance to corrosion.
Gold-Plated RCA Input Connectors:
Provides the most accurate signa! transnission and
lowest possible loss. Gold-plated terminalsare immune
to signal deterioration caused by corrision in the
connectors that can develop over time.
Gold-Plated Speaker Output and Power Coranectors:
For high definition, oxidization resistance,anc minimal
transfer loss.
High Performance, Low Noise, Audiomile Quality
Active and Passive Components.
Capacitive / Inductive Power Supply Input and
Output Filtering:
For low radio frequency interference (RFI) ind immunity
to system noises (such as alternator whine.