Filter
Top Products
12 | JL Audio - M600/1 Owner’s Manual
13
APPENDIX B:
Precise Frequency Selection Chart
“FILTER FREQ” AMP FILTER
Detent Panel Actual
Number Marking Freq.
Full counter-clockwise: 53
01 ............................53
02 ...........“50”............53
03 ............................54
04 ............................54
05 ............................55
06 ............................57
07 ............................59
08 ...........“60”............61
09 ............................63
10 ............................65
11 ............................67
12 ............................70
13 ............................72
14 ............................75
15 ............................78
16 ...........“80”............81
17 ............................85
18 ............................88
19 ............................93
20 .......“12 o’clock”........97
21 ...........................102
22 ...........................107
23 ...........................113
24 ..........“120” ..........120
25 ...........................127
26 ...........................135
27 ...........................144
28 ...........................156
29 ...........................169
30 ...........................184
31 ...........................203
32 ..........“200” ..........227
33 ...........................254
34 ...........................290
35 ...........................337
36 ...........................392
37 ...........................426
38 ..........“500” ..........447
39 ...........................467
Full-clockwise: 470
APPENDIX C:
M600/1 Specifications
General Specifications:
Recommended Fuse Value: 50A
Recommended Fuse Type: MAXI® or AGU
Input Sections:
No. of Inputs: One Stereo Pair
Input Type: Differential-balanced with RCA jack inputs
Input Range: 100mV - 4V RMS
Amplifier Section:
Amplifier Topology: NexD™ High Speed Class D
Power Supply: Unregulated MOSFET switching type
Rated Power at 14.4V with less than
1% THD+Noise (20Hz - 20 kHz)
400W RMS x 1 @ 4 ohms
600W RMS x 1 @ 2 ohms
Rated Power @ 12.5V with less than
1% THD + Noise (20Hz - 20 kHz)
300W RMS x 1 @ 4 ohms
500W RMS x 1 @ 2 ohms
Signal to Noise Ratio:
>87 dB referred to rated power
(A-weighted, 20 Hz-20 kHz noise bandwidth)
>67 dB referred to 1W
(A-weighted, 20 Hz-20 kHz noise bandwidth)
Frequency Response: 7 Hz - 500 Hz (+0, -1dB)
Damping Factor:
>1000 @ 4 ohms / 50 Hz
>500 @ 2 ohms / 50 Hz
Amplifier Filters:
Amplifier Low-Pass Filter:
State-variable, 12 dB/octave Butterworth or 24 dB/octave
Linkwitz-Riley with continuously variable cutoff frequency
selection from 50 - 500 Hz (defeatable).
Infrasonic Filter:
24 dB/octave Butterworth @ 30 Hz (defeatable).
Preamp Output:
Buffered pass-through type.
Dimensions(LxWxH):
8.52” x 7.09” x 2.05” (217mm x 180mm x 52mm)
APPENDIX A:
Input Sensitivity Level Setting
Following the directions below will allow the
installer to adjust the input sensitivity of each
amplifier channel pair simply and easily in just a
few minutes using equipment which is commonly
available.
Necessary Equipment
• Digital AC Voltmeter
• CD with a sine-wave test tone recorded at
0 dB reference level in the frequency range
to be amplified for that set of channels
(50 Hz for subwoofer channels, 1 kHz for a
midrange application). Do not use attenuated
test tones (-10 dB, -20 dB, etc.).
The Nine-Step Procedure
1) Disconnect the subwoofer(s) from the
amplifier’s speaker output connectors.
2) Turn off all processing (bass/treble, loudness,
EQ, etc.) on the source unit, processors (if
used) and amplifier. Set fader control to center
position and subwoofer level control to 3/4 of
maximum (if used to feed the M600/1).
3) Turn the amplifier’s “Input Sens.” control all
the way down.
4) Set the source unit volume to 3/4 of full
volume. This will allow for reasonable gain
overlap with moderate clipping at full volume.
5) Using the chart on this page, determine the target
voltage for input sensitivity adjustment according
to the nominal impedance of the subwoofer
system connected to the amplifier outputs.
6) Verify that you have disconnected the
subwoofer(s) before proceeding. Play a track
with an appropriate sine wave (within the
frequency range to be amplified by the M600/1)
at 3/4 source unit volume.
7) Connect the AC voltmeter to the speaker output
connectors of the amplifier. Make sure you test
the voltage at the correct connectors (+ and –).
8) Increase the “Input Sens.” control until the
target voltage is observed with the voltmeter.
9) Once you have adjusted the M600/1 to its
maximum low-distortion output level,
reconnect the speaker(s). The “Input Sens.”
controls can now be adjusted downward if the
amplifier requires attenuation to achieve the
desired system balance.
Do not increase any “Input Sens.” setting for
any amplifier channel or channel pair in the
system beyond the maximum level established
during this procedure. Doing so will result in
audible distortion and possible speaker damage.
It will be necessary to re-adjust the
“Input Sens.” if any equalizer boost is activated
after setting the “Input Sens.” with this
procedure. This applies to any EQ boost circuit,
including source unit tone controls or EQ
circuits. EQ cuts will not require re-adjustment.
Nom. Impedance Target AC Voltage
4 40.0 V
3 37.3 V
2 34.6 V
1
Not Recommended
Due to ongoing product development, all specifications are subject to
change without notice.