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Clarion APX1300 amplifier
includes a continuously variable 50-300 Hz low-pass crossover to filter out the
highs from your subwoofer. The crossover has a 12dB/octave slope. For full range
operation, you can set the X-Over mode to "Off" and the Frequency control has no
Bass Boost: You can engage a
narrow frequency band (High Q) bass boost circuit to compensate for a less than
ideal subwoofer enclosure design. The added boost produces rich, full bass tones
that are normally difficult to reproduce in a car audio environment. The Bass
Boost circuit has a fixed frequency at 45Hz. You can select a gain of +6db or
+12dB, or select "Off" if you don't want to boost the bass frequencies.
The amplifier has a two-way protection circuitry. The amplifier will shut down
when the operating temperature is too high and when the speaker outputs are
shorted. A red LED on the left side of the amplifier glows when the amp has shut
down and is in protection mode.
Speaker-level and Line-level
Inputs: The amp provides both line-level and speaker-level inputs. If
connecting a receiver with line outputs, you can use an RCA stereo patch cable.
If the receiver does not have line outputs, you can splice the supplied
high-level speaker input harness to the receiver's left and right speaker wires,
then plug the harness into the amplifier.
Gold-plated Terminals: The
APX1300 features gold-plated connections, including the screw terminals for
power, ground, remote, and speakers, as well as the RCA line inputs. These
gold-plated terminals prevent corrosion and provide excellent signal transfer.
CEA-2006 Compliant: CEA-2006 is
a system of testing & measurement methods for mobile audio amplifiers. This
voluntary standard advocates a uniform method for determining an amplifier's RMS
power output and signal-to-noise ratio. The criteria for measuring power uses a
DC input voltage of 14.4 volts and the RMS power output is measured into a 4-ohm
load, with 1% or less Total Harmonic Distortion (THD) plus noise. CEA-2006
allows consumers to compare car amplifiers and receivers on an equal basis.
- Gain Control: a rotary
control used to set the amplifier's input sensitivity to match
the level of the incoming signal
- Bass Boost control: a
3-way switch used to set the bass boost from 0 (center position) to +6dB
(left) or +12dB (right) at 45 Hz
- Crossover (X-OVER) Control:
- Frequency: a rotary control that
sets the crossover cut off
frequency from 50 to 300Hz
- Mode: a 2-way switch used
to set the crossover to Low Pass Filter (LPF) or Off (Full Range)
- Low Input: 1 pair of
stereo RCA inputs
- High Input: 5-pin plug-in
clip for use with the supplied high-level speaker input harness
- Speaker Terminals: 4
gold-plated screw terminals
- Note: There are two +/- pairs
of speaker terminals, but they are connected together internally and they
provide mono output. If two 4-ohm speakers are connected, one to each set of
terminals, the amplifier will see a 2-ohm load, because the terminals are
internally connected, in parallel with each other
- +12V (power): screw terminal
- GND (ground): screw
terminal (0.5" wide)
- REM (remote turn-on): screw terminal (accepts up to 8-gauge wire)
- Fuses: three 20-amp fuses
- RMS power at 4 ohms: 300
watts x 1 (20-300Hz, at 0.1% THD)
- RMS power at 2 ohms: 400
watts x 1 (20-300Hz, at 0.1% THD)
- Max power output at 4 ohms:
400 watts x 1
- Signal-to-Noise Ratio:
- Frequency Response: 20-30kHz Full
- Input Impedance: 22k Ohm
- Allowable Battery