JL Audio Slash v2 300/2V2 Owner's Manual page 7

aPPendix a:
input sensitivity level setting
JL Audio amplifiers utilizing the Regulated
Intelligent Power Supply (R.I.P.S.) allow
delivery of their rated power when connected
to any load impedance from 1.5 - 4Ω per
channel and when connected to a charging
system with any voltage from 11 - 14.5V. This
design is beneficial for many reasons. One of
these reasons is ease of setup. Because each
JL Audio amplifier will always deliver the
same amount of power within its operational
range of impedances and supply voltages, the
maximum, unclipped output is very predictable.
This makes setting the gain structure via the
input sensitivity controls very simple. Following
the directions below will allow the user to adjust
the input sensitivity of the amplifier(s) 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). The CleanSweep®
Calibration Disc contains the appropriate
test tones and is available for sale at
http://store.jlaudio.com. 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 300/2v2).
3) Switch the "Input Voltage" switch to "Low" and
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.
12 | JL Audio - 300/2 Owner's Manual
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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 300/2v2) 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 300/2v2 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.
!
IMPORTANT
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.
nom. target aC Voltage
impedance
stereo bridged
8Ω
24 . 5 V 49 . 0 V
6Ω
24 . 5 V 42 . 4 V
4Ω
24 . 5 V 34 . 6 V
3Ω
21 . 2 V 30 . 0 V
2Ω
17 . 3 V not recommended
1.5Ω
18 . 0 V not recommended
aPPendix b:
Precise Frequency selection Chart
"Filter Freq" amP Filter
detent Panel actual
number marking Freq.
Full counter-clockwise: 58
01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8
02 . . . . . . . . . . . "50" . . . . . . . . . . . . 5 8
03 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8
04 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8
05 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 9
06 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 0
07 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1
08 . . . . . . . . . . . "60" . . . . . . . . . . . . 6 3
09 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5
10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7
11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 9
12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1
13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4
14 . . . . . . . . . . . "75" . . . . . . . . . . . . 7 7
15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 0
16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2
17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5
18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 0
19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3
20 . . . . . . . . . . . "95" . . . . . . . . . . . . 9 7
21 . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
22 . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
23 . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
24 . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
25 . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
26 . . . . . . . . . . ."130" . . . . . . . . . . . 135
27 . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
28 . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
29 . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
30 . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
31 . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
32 . . . . . . . . . . ."200" . . . . . . . . . . . 223
33 . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
34 . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
35 . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
36 . . . . . . . . . . . . . . . . . . . . . . . . . . . 404
37 . . . . . . . . . . . . . . . . . . . . . . . . . . . 474
38 . . . . . . . . . . ."500" . . . . . . . . . . . 514
39 . . . . . . . . . . . . . . . . . . . . . . . . . . . 525
Full-clockwise: 542
aPPendix C:
300/2v2 specifications
general specifications:
Recommended Fuse Value: 40A
Recommended Fuse Type: AFS, AGU or MaxiFuse™
input sections:
No. of Inputs: One Stereo Pair
Input Type: Differential-balanced with RCA jack inputs
Input Range: Switchable from 200mV - 2V RMS
to 800mV - 8V RMS
amplifier section:
Amplifier Topology: Class AB with patented Absolute
Symmetry™ dual N-Channel MOSFET output design
Power Supply: Independent, pulse width modulation-reg-
ulated switching power supply with multistage impedance
optimizing circuitry .
Rated Power (Stereo):
150W RMS x 2 @ 1 . 5 -4Ω (11V - 14 . 5 V)
Rated Power (Bridged):
300W RMS x 1 @ 3-8Ω (11V - 14 . 5 V)
THD at Rated Power: <0 . 0 3% @ 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
amplifier Filter:
Filter Type: State-variable, 12 dB/octave Butter-
worth 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 . Defeatable .
Preamp output:
2-Channel, switch-selectable as pass-through type, tracking
High-Pass, or tracking Low-Pass linked to Amplifier Filter .
dimension (lxwxH):
13 . 4 " x 9 . 2 5" x 2 . 3 6" (340mm x 235mm x 60mm)
Due to ongoing product development, all specifications are subject to
change without notice .
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