Alpine 3541 - Features; 2;1 Channel Operation; Duo-ẞ Feedback Circuitry; No Current Limiting

3541
Features
¢ 2/1 Channel Operation: c. L+R Mode:
The 3541 can be used as a 2-channel stereo amplifier,
producing 60 watts per channel into 4 ohms, or 50 watts
per channel into 2 ohms. It can also be bridged for single
channel operation to produce a conservatively rated 100
watts into 4 ohms.
Duo-8 Feedback Circuitry:
Duo-Beta is a patented and technologically advanced
form of 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.1.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.1.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.I.M., excellent transient response, and
superb sonic quality.
S.T.A.R. Circuitry:
Alpine’s 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).
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.
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.
Extra Heavy Duty Construction:
Glass-epoxy printed circuit boards for durability and
separate high current power transfer bus-bars for
primary voltage connections inside the amplifier.
Fully Complementary, Discrete Output Circuitry:
For excellent reliability, superb sonic performance and
high current capability for accurate transient response.
Continuously Adjustable Input Gain Control:
For matching the 3541 with components with a preamp
output level other than 500 mV (the standard preamp
output level of Alpine equipment). Also used to obtain
certain imaging characteristics or to compensate for
different speaker efficiencies.
Gold-Plated RCA Input Connectors:
Provides the most accurate signal transmission and
lowest possible loss. Gold-plated terminals are immune
to signal deterioration with time that can be caused by
corrosion in the connectors.
Gold-Plated Speaker Output and Power Connectors:
For high definition, minimum loss power transfer anc
oxidization resistance.
High Performance, Low Noise, Audiophile Quality,
Active and Passive Components.
Capacitive/Inductive Power Supply Input and Output
Filtering:
For low radio frequency interference (RFI) and immunity
to system noises (such as alternator whine).