The403a is a 400 Watt amplifier designed to provide high
power, exceptional flexibility and outstanding performance
in an all-in-one package. The 403a’s three channel technology
is all you need for a high performance speaker and subwoofer
system.
The on-board “Balanced Line Inputs” will accept a wide range of input sig-
nals – from your OEM Factory head-unit to the latest advances in CD head-
unit technology. The “Balanced Line” circuitry also helps eliminate noise
(alternator whine) induced into the signal cables.
As with all Xtant amplifiers, the 403a incorporates a forced convection ther-
mal management system, a Pulse Width Modulated power supply for unsur-
passed reliability and three on-board accessory ports allow performance
upgrades via Xtant’s plug-in modules. All these features are encased in
Xtant’s exclusive finish of polished stainless steel and copper!
Standard Features
Forced Convection Cooling:
The 403a employs forced convection
cooling for thermal management. An on-board thermal sensing
circuit regulates fan speed to maintain optimum operating
temperature.
Balanced / Floating Input:
The 403a is supplied
with Balanced / Floating inputs. When engaged, this cir-
cuitry helps to eliminate “system noise” associated with
“ground-loops”. It also increases input sensitivity which
“widens the scope” of head units for use with the 403a
Modular Expansion Ports:
The 403a is supplied with five modular
port(s). Four of the ports are dedicated to the amplifier and allow you to dock
any of Xtant’s signal processing modules. The fifth port is reserved for add
on signal processing to the RCA line outputs. The modular method of system
expansion is a convenient means of adding the level(s) of signal processing to
satisfy your unique system requirements.
resistor modules / passive speaker terminals:
The Resistor
Modules (RM) serve two purposes. First, they activate the “passive speaker
terminals” and attenuate (turn down) the level of any speakers connected to
these terminals. Designed to power the rear fill speakers, the “passive termi-
nals” may be used with any speakers that you desire to attenuate (ie tweet-
ers / center channel). The RM Modules offer four levels of attenuation: -4, -8,
-12, or -16 dB.
Protection Circuitry:
Both Thermal and Overcurrent protection are
incorporated into the 403a. In the event of a problem, either thermal or over-
current protection will reduce amplifier power to maintain operation.
Status LEDs:
Three LEDs, visible through the cover, indicate operational
status of all Xtant amplifiers. The red LED illuminates when the amplifier is
“ON”, the yellow LED indicates that overcurrent protection is employed and
the orange LED glows when the thermal protection circuit is operational.
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Summary of Contents for 403A
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