JL Audio XDM1000/5 Manual Del Proprietário página 5

APPENDIX A:
Input Sensitivity Level Setting
Follow the steps below to adjust the input sensitivity of each amplifier
channel pair to achieve overall system balance.
Necessary Equipment
• Digital AC Voltmeter
• Sine-wave test tone recorded at 0 dBfs reference level in the frequency range to be amplified.
Do not use attenuated test tones (-10 dB, -20 dB, etc.).
Full range channel/amplifier applications: 1 kHz
Subwoofer channel/amplifier applications: 50 Hz
• Depending on your type of source unit, the sine-wave may be played via a CD, USB thumb drive, portable media player or
Bluetooth® audio source. Make sure to disable any EQ/DSP modes on your portable media player during level setting.
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 the fader control to center position and the subwoofer level control to 3/4 of maximum, if used.
3. Turn all "Input Sens." controls 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 below, 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) at 3/4 source unit volume.
7. Connect the AC voltmeter to the speaker output terminals 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 terminals (L+ and R–).
8. Increase the "Input Sens." control until the target voltage is observed with the voltmeter.
9. Once you have adjusted each channel section 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." 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.
Nominal
Impedance
Main CH (Stereo)
8Ω
17.3 V
4Ω 17.3 V
3Ω 16.2 V
2Ω
14.1 V
8 | JL Audio® - XDM1000/5
Target AC Voltage
Main CH (Bridged) Subwoofer CH
34.6 V 40.0 V
28.3 V 40.0 V
not recommended 38.7 V
not recommended 34.6 V
SPECIFICATIONS
Amplifier Section
Amplifier Topology NexD™ Ultra-High Speed Class D
Power Supply Type Unregulated MOSFET Switching
Minimum Copper 4 AWG
Power/GND Wire (Note: CCA/Copper Clad Aluminum wire is not recommended.)
Recommended Fuse 80 A
Main @ 4 Ω
75W x 4
Rated RMS Power @ 14.4V,
<1% THD+N
Sub @ 4 Ω
400W x 1
Main @ 4 Ω
60W x 4
Rated RMS Power @ 12.5V,
<1% THD+N
Sub @ 4 Ω
360W x 1
Main Channels: 12 Hz – 22 kHz (+0, -1dB)
Frequency Response
Sub Channel: 10 Hz – 1 kHz (+0, -1dB)
Main Channels: >104 dB (Referred to rated power),
S/N Ratio
>84 dB (Referred to 1W)
(A-weighted, 20 Hz–20 kHz
Sub Channel: >100 dB (Referred to rated power),
noise bandwidth)
>80 dB (Referred to 1 W)
Main Channels: >150 / 50 Hz @ 4 Ω, >75 / 50 Hz @ 2 Ω
Damping Factor
Sub Channel: >120 / 50 Hz @ 4 Ω, >75 / 50 Hz @ 2 Ω
Input Section
Number of Inputs 6 (Three Stereo Pairs)
Input Type Differential-Balanced with RCA jack inputs
Input Voltage Range 200mV – 4V RMS
Signal Processing
CH. 1&2
Active, 12dB/octave,
Filter Type
High-Pass (50 – 5,000 Hz),
defeatable
Remote Level Control HD-RLC or MHD-RLC (optional). Full mute to 0 dB range.
Dimensions
L x W x H 14.73 in. x 7.09 in. x 2.05 in. (374 mm x 180 mm x 52 mm)
Due to ongoing product development, all specifications are subject to change without notice.
Main @ 2 Ω Main @ 4 Ω Bridged
100W x 4 200W x 2
Sub @ 3 Ω Sub @ 2 Ω
500W x 1 600W x 1
Main @ 2 Ω Main @ 4 Ω Bridged
90W x 4 180W x 2
Sub @ 3 Ω Sub @ 2 Ω
480W x 1 600W x 1
CH. 3&4 SUB CH.
Active, 12dB/octave, Active,
High-Pass (50 – 500 Hz) or 12dB or 24dB/octave
Bandpass (CH. 1&2 as Low- Low-Pass, (50 – 500 Hz),
Pass), defeatable defeatable
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