JL Audio 450/4V2 用户手册

26  |  JL Audio - 450/4

v2

 Owner’s Manual  

27

Recommended Fuse Value:  60A

Recommended Fuse Type:

  

AFS, AGU or MaxiFuse™

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

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.

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.

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).

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.