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 @ 1.5-4
Ω
(11V - 14.5V)
Rated Power (Bridged):
300W RMS x 1 @ 3-8
Ω
(11V - 14.5V)
THD at Rated Power:
<0.03% @ 4
Ω
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 @ 4
Ω
per ch. / 50 Hz, >100 @ 2
Ω
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 - 4
Ω
(11V - 14.5V)
Rated Power (Bridged):
150W RMS x 1 @ 3 - 8
Ω
(11V - 14.5V)
THD at Rated Power:
<0.03% @ 4
Ω
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 @ 4
Ω
per ch. / 50 Hz, >100 @ 2
Ω
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
