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CEA 2006 Compliant: The XR-4S's power ratings are measured
according to the strict standards dictated by the Consumer Electronics Association
(CEA). These standards allow you to accurately compare the rated power output of
all CEA 2006-compliant amplifiers. Manufacturers who adhere to the standards can
display the CEA 2006 logo on their products and packaging. The amplifier features
the following power specifications:
- 4-Ohm RMS Power Rating: 120 watts x
4-channels into 4-ohms, measured from 20-20 kHz, at 14.4
volts, with no more than 1% THD+noise
- Bridged RMS Power Rating: 300 watts
x 2-channels into 4-ohms at 1 kHz with 1% THD
- 2-Ohm RMS Power Rating: 150 watts x
4-channels into 2-ohms at 1 kHz with 1% THD
- Max Power Output: 1200 watts (300
watts x 4-channels) Peak
Class D Amplifier: Class D amps are very efficient and their
small size offers installation flexibility. Before amplifying an incoming signal,
a Class D amp converts the signal to digital. Digital signals can be amplified
very efficiently, so you get a lot more power with less current. Less input current
reduces power supply size and generates less waste heat, thus reducing the heat
sink size. The amp then converts the amplified signal back to analog.
Dual Power Supply: This design provides one power supply for
positive current and one power supply for negative current. The result is a cleaner
voltage source, fewer failures due to short circuit, less power loss due to variances
in transformer tolerances, and less transformer noise even when the positive and
negative loads are unstable.
Cooling Fan: There is a cooling fan and vents on each side of
the amplifier to help dissipate heat and ensure cool, reliable operation. Make sure
not to block these vents or the fan when you install the amplifier.
Protection circuitry: The XR-4S features protection circuits
that will turn the amp off in case of the following events:
- Speaker wire short-circuits
- Speaker output contacts ground
- Amp overheats
- Unit malfunctions and DC is sent to
Input Sensitivity: The XR-4S features two gain controls, one
for each 2-channel section of the amplifier (A and B). The input sensitivity of
each is adjustable from 0.2 volts to 5.0 volts.
Input Select: Set the input select to AB when using both line
inputs; set to A when using only one set of inputs to feed all four amplifier
Filter Switch: The A and B sections of the amplifier have
individual switches to set the crossover to low-pass, off (full range), or high-pass.
Frequency Range: The A and B sections of the amplifier have
individual switches to set the crossover frequency range to high (2.5 kHz to 10
kHz) or low (50 Hz to 200 Hz).
Filter Frequency: The continuously variable crossover frequency
range changes depending on the setting of the Frequency Range switch; 50 Hz to 200
Hz in the low position, 2.5 kHz to 10 kHz in the high position. The filter frequency
is individually adjustable for the A and B sides of the amplifier.
Power And Ground Terminals: The amplifier features Allen head
set-screw Power and Ground terminals that will accommodate up to 4 gauge wire. 6
gauge minimum is recommended.
Remote Turn-On Terminal: The remote turn-on is an Allen head
set-screw terminal that will accommodate up to 8 gauge wire.
Speaker Terminals: The four speaker terminals are Allen head
set-screw terminals that will accommodate up to 8 gauge wire. 12 gauge minimum is
RCA Inputs: The amplifier features two pair of gold-plated
RCA input connections.
Fuse: The amplifier contains two 30-amp fuses.