JL Audio E6450 - Manual (Page 7)

JL AUDIO e6450 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 . . . . . . . . . . . . . . . . . . . . . . . .53
04 . . . . . . . . . . . . . . . . . . . . . . . .54
05 . . . . . . . . . . . . . . . . . . . . . . . .54
06 . . . . . . . . . . . . . . . . . . . . . . . .55
07 . . . . . . . . . . . . . . . . . . . . . . . .55
08 . . . . . . . . .“55” . . . . . . . . .56
09 . . . . . . . . . . . . . . . . . . . . . . . .56
10 . . . . . . . . . . . . . . . . . . . . . . . .57
11 . . . . . . . . . . . . . . . . . . . . . . . .58
12 . . . . . . . . . . . . . . . . . . . . . . . .59
13 . . . . . . . . . . . . . . . . . . . . . . . .62
14 . . . . . . . . .“60” . . . . . . . . .65
15 . . . . . . . . . . . . . . . . . . . . . . . .65
16 . . . . . . . . . . . . . . . . . . . . . . . .66
17 . . . . . . . . . . . . . . . . . . . . . . . .70
18 . . . . . . . . . . . . . . . . . . . . . . . .73
19 . . . . . . . . . . . . . . . . . . . . . . . .77
20 . . . . . . . . .“80” . . . . . . . . .81
21 . . . . . . . . . . . . . . . . . . . . . . . .84
22 . . . . . . . . . . . . . . . . . . . . . . . .88
23 . . . . . . . . . . . . . . . . . . . . . . . .94
24 . . . . . . . . . . . . . . . . . . . . . . .101
25 . . . . . . . . . . . . . . . . . . . . . . .104
26 . . . . . . . . .“120” . . . . . . . .115
27 . . . . . . . . . . . . . . . . . . . . . . .118
28 . . . . . . . . . . . . . . . . . . . . . . .128
29 . . . . . . . . . . . . . . . . . . . . . . .137
30 . . . . . . . . . . . . . . . . . . . . . . .146
31 . . . . . . . . . . . . . . . . . . . . . . .164
32 . . . . . . . . .“150” . . . . . . . .177
33 . . . . . . . . . . . . . . . . . . . . . . .193
34 . . . . . . . . . . . . . . . . . . . . . . .197
35 . . . . . . . . . . . . . . . . . . . . . . .209
36 . . . . . . . . . . . . . . . . . . . . . . .213
37 . . . . . . . . . . . . . . . . . . . . . . .216
38 . . . . . . . . .“200” . . . . . . . .218
39 . . . . . . . . . . . . . . . . . . . . . . .225
Full-clockwise: 225
APPENDIX C:
e6450 Specifications
GENERAL SPECIFICATIONS:
Recommended Fuse Value: 60A
Recommended Fuse Type: AGU or MaxiFuse™
INPUT SECTIONS:
No. of Inputs: Three Stereo Pairs
Input Type: Differential, noise-cancelling with RCA jack
inputs (low-level, three pairs) and multi-pin jack
(high-level, two pairs)
Input Range: 200mV - 8V RMS
AMPLIFIER SECTION:
Amplifier Topology: Class AB with patented Absolute
Symmetry™ dual N-Channel MOSFET output design
Power Supply: Unregulated MOSFET switching type
Rated Power (Stereo):
45W RMS x 6 @ 4 Ω (12.5V)
75W RMS x 6 @ 2 Ω (12.5V)
Rated Power (Bridged):
90W RMS x 3 @ 8 Ω (12.5V)
150W RMS x 3 @ 4 Ω (12.5V)
THD at Rated Power: <0.08% @ 4 ohms per channel
(20 Hz - 20 kHz)
Signal to Noise Ratio: >104 dB referred to rated power
(A-weighted, 20 Hz-20 kHz noise bandwidth)
Frequency Response: 10 Hz - 25 kHz (+0, -1dB)
Damping Factor: >200 @ 4 Ω per ch./50 Hz,
>100 @ 2 Ω per ch. /50 Hz
Slew Rate: ± 22V/µs
AMPLIFIER FILTER:
Filter Type: State-variable, 12dB/octave Butterworth with
continuously variable cutoff frequency selection from
50-200 Hz. Configurable as Low-Pass or High-Pass.
Defeatable.
DIMENSIONS (LxWxH):
17.7" x 9.25" x 2.36" (450mm x 235mm x 60mm)
Due to ongoing product development, all specifications are
subject to change without notice.
12 JL AUDIO e6450
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 in installation bays.
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 speaker(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 e6450).
3) Turn the “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 speaker
system connected to the amplifier outputs.
6) Verify that you have disconnected the
speakers before proceeding. Play a track with an
appropriate sine wave (within the frequency range
to be amplified by the e6450) at 3/4 source
unit volume.
7) Connect the AC voltmeter to the speaker
output connectors of the amplifier. If the channel
pair is operating in stereo, it is only necessary to
measure one channel. If bridged, make sure you test
the voltage at the correct connectors (L+ and R–).
8) Increase the “Input Sens.” control until the
target voltage is observed with the voltmeter.
9) Once you have adjusted the e6450 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.” for the affected channels 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.
I M P O RTA N T !
Nom. Target AC Voltage
Impedance Stereo Bridged
8 Ω 13.4 V 26.8 V
6 Ω 13.4 V 25.6 V
4 Ω 13.4 V 24.6 V
3 Ω 12.8 V not recommended
2 Ω 12.3 V not recommended