User Guide

JL AUDIO 450/4 25
APPENDIX D:
450/4 Specifications
GENERAL SPECIFICATIONS:
Recommended Fuse Value: 60A
Recommended Fuse Type: AGU or MaxiFuse™
INPUT SECTIONS:
No. of Inputs: Two Stereo Pairs (CH 1&2, CH 3&4)
Input Type: Differential-balanced with RCA jack inputs
Input Range: Switchable from 200mV - 2V RMS
to 800mV - 8V RMS
CHANNELS 1 & 2:
Amplifier Topology: Class AB with patented Absolute
Symmetry™ dual N-Channel MOSFET output design
Power Supply: Independent, pulse width modulation-
regulated switching power supply with multistage
impedance optimizing circuitry.
Rated Power (Stereo):
150W RMS x 2 @ 1.5-4Ω (11V - 14.5V)
Rated Power (Bridged):
300W RMS x 1 @ 3-8Ω (11V - 14.5V)
THD at Rated Power: <0.03% @ 4Ω per channel
(20 Hz-20 kHz)
Signal to Noise Ratio: >108.5 dB referred to rated power
(A-weighted, 20 Hz-20 kHz noise bandwidth)
Frequency Response: 5 Hz - 30 kHz (+0, -1dB)
Damping Factor: >200 @ 4Ω per ch. / 50 Hz, >100 @ 2Ω
per ch. / 50 Hz
Slew Rate: ± 25V/µs
CH 1&2 Filter: State-variable, 12 dB/octave Butterworth or
24 dB/octave Linkwitz-Riley Low-Pass or High-Pass with
continuously variable cutoff frequency from 50 - 500 Hz,
switchable to a range of 500 - 5000 Hz, via x10 switch.
Can also be cascaded from Channel 3&4 filter’s cutoff
frequency to operate as a bandpass filter for tri-amp
configurations. Defeatable.
LF Boost: Single-band, fixed-frequency (48 Hz), fixed “Q”
+6 dB boost. Defeatable. Port for optional remote bass
control to provide variable boost control from 0 to +15 dB.
Infrasonic Filter: 24 dB/octave @ 30 Hz, defeatable.
CHANNELS 3&4:
Amplifier Topology: Class AB with patented Absolute
Symmetry™ dual N-Channel MOSFET output design
Power Supply: Independent, pulse width modulation-
regulated switching power supply with multistage
impedance optimizing circuitry.
Rated Power (Stereo):
75W RMS x 2 @ 1.5 - 4Ω (11V - 14.5V)
Rated Power (Bridged):
150W RMS x 1 @ 3 - 8Ω (11V - 14.5V)
THD at Rated Power: <0.03% @ 4Ω per channel
(20 Hz - 20 kHz)
Signal to Noise Ratio: >108.5 dB referred to rated power
(A-weighted, 20 Hz - 20 kHz noise bandwidth)
Frequency Response: 5 Hz - 30 kHz (+0, -1 dB)
Damping Factor: >200 @ 4Ω per ch. / 50 Hz, >100 @ 2Ω
per ch. / 50 Hz
Slew Rate: ± 25V/µs
Channel 3&4 Filter: State-variable, 12 dB/octave
Butterworth or 24 dB/octave Linkwitz-Riley High-Pass with
continuously variable cutoff frequency from 50 - 500 Hz,
switchable to a range of 500 - 5000 Hz, via x10 switch.
PREAMP OUTPUT:
2-Channel pass-through type, switch-selectable to pass
signal from CH 1&2 inputs only, from CH 3&4 inputs only
or from all four inputs (summed).
DIMENSIONS: (LxWxH):
19.7" x 9.25" x 2.36" (500mm x 235mm x 60mm)
Due to ongoing product development, all specifications are
subject to change without notice.
24 JL AUDIO 450/4