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| JL Audio - 450/4
v2
Owner’s Manual
27
APPENDIX D:
450/4v2 Specifications
General Specifications:
Recommended Fuse Value:
60A
Recommended Fuse Type:
AFS, 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 A/B 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 A/B 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):
19.70 in. x 9.25 in. x 2.36 in. (500 mm x 235 mm x 60 mm)
Due to ongoing product development, all specifications are subject to
change without notice.
