Alpine 3547 - Input Mode Selector; DC-DC Switching Power Supply; Robust Construction; Adjustable Input Gain

SWITCHES AND TERMINALS
FEATURES
@ HIGH PERFORMANCE, LOW NOISE, AUDIOPHILE QUALITY ACTIVE
FEATURES
@ INPUT MODE SELECTOR
This switch allows the user to specify the input signal entering the ampli-
fier.
a. ST (Stereo) Mode:
Allows the right and left channels to reach their designated amplifier
channels. This mode provides a stereo output or a center channel
common information output (when used in the bridged configuration).
b. 1 (MONO) Mode:
Disables the right channel input connector and routes the signal through
the 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. 142 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.
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 and separate high current power
transfer bus-bars for primary voltage and ground connections inside the
amplifier.
AND PASSIVE COMPONENTS
For best possible performance and consistency from unit to unit.
VOLTAGE REGULATED/FILTERED INPUT STAGES
For excellent stability & low noise.
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.
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).
STATUS MONITOR
This indicator illuminates in green when the amplifier is on and
operational. This light will turn orange if any internal protection circuitry is
activated.
It can be used as a troubleshooting aide should installation problem
develop.
CONTINUOUSLY ADJUSTABLE INPUT GAIN CONTROL > lnpat Bain Avene Cone
For matching the 3547 with components with a preamp output level other @ Active Dividing Network Mode
than 500 mV (the standard preamp output level of Alpine equipment). Selector Switch
Also used to obtain certain imaging characteristics or to compensate for @ Input Mode Selector Switch
different speaker efficiencies. @® RCA Input Connectors
FULLY DISCRETE, COMPLEMENTARY OUTPUT CIRCUITRY S Seer Sn ue euminae
For excellent reliability, superb sonic performance and high current © Fuse (20A) ;
capability for accurate transient response. @ Battery Lead Terminal
Remote Turn-On Lead Termina
GOLD-PLATED,
SCREW-DOWN
POWER
AND
SPEAKER
@
Ground
Lead
Terminal
TEBMINSES Status Monitor
For high definition, minimum loss power transfer and oxidization resist-
ance.