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JL Audio M700 Manual

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8 | JL Audio - M700/5 Owner’s Manual
Channel 1 & 2 Filter: 12dB/octave High-Pass
only, with x10 multiplier switch
“Off”: Defeats the filter completely, allowing
the full range of frequencies present at the inputs
to feed these channels. This is useful for systems
utilizing outboard active crossovers or requiring
full-range reproduction this channel pair.
“x1” (High-Pass): Configures the filter
to attenuate frequencies below the indicated
filter frequency at a rate of 12dB per octave.
This is useful for connection of component
speakers or coaxials to this channel pair in a
bi-amplified system.
“x10” (High-Pass): Configures the filter to
attenuate frequencies below a frequency TEN
TIMES HIGHER than the indicated filter
frequency at a rate of 12dB per octave. This is
useful for connection of tweeters to this channel
pair in a tri-amplified system.
Channel 3 & 4 Filter: 12dB/octave High-Pass
or Bandpass Filter
“Off”: Defeats the filter completely, allowing
the full range of frequencies present at the inputs
to feed these channels. This is useful for systems
utilizing outboard active crossovers or requiring
full-range reproduction this channel pair.
“BP” (High-Pass): Configures the filter to
attenuate frequencies below the indicated filter
frequency AND above the Channel 1 & 2 Filter
Frequency, at a rate of 12dB per octave. This is
useful for connection of mid-bass or mid-range
speakers in a tri-amplified system.
“HP” (High-Pass): Configures the filter
to attenuate frequencies below the indicated
filter frequency at a rate of 12dB per octave.
This is useful for connection of component
speakers or coaxials to this channel pair in a
bi-amplified system.
Subwoofer Channel Filter: 12dB/octave
or 24dB / octave, Low-Pass only
“Off”: Defeats the filter completely, allowing
the full range of frequencies present at the inputs
to feed this channel. This is useful for systems
utilizing outboard active crossovers.
“12dB” (Low-Pass): Configures the filter
to attenuate frequencies above the indicated
filter frequency at a rate of 12dB per octave.
This is useful for connection of subwoofers
in a bi-amplified system. This shallower slope
gently attenuates high-frequencies from your
subwoofer signal and is often well-suited for
systems with smaller main speakers.
“24dB” (Low-Pass): Configures the filter
to attenuate frequencies above the indicated
filter frequency at a rate of 24dB per octave.
This is useful for connection of subwoofers in
a bi-amplified system. This sharper slope more
aggressively removes high-frequencies from
your subwoofer signal and is often well-suited
for systems with larger main speakers, like our
7.7-inch component and coaxial systems.
2) “Filter Freq. (Hz)” The filter frequency
markings surrounding these rotary controls
(one in each Channel Section) are for
reference purposes and are generally accurate
to within 1/3 octave or better. If you would
like to select the filter cutoff frequency with a
higher level of precision, consult the chart in
Appendix B (page 15).
Tuning Hint: If you are using the M700/5
to drive a subwoofer system (“LP” mode),
and component satellite speaker systems
(“HP” mode), 80 Hz is a good baseline
“Filter Freq. (Hz)” setting. After properly
adjusting the “Input Sens.”, as outlined in
Appendix A (page 14), you can fine tune
the “Filter Freq. (Hz)” control to achieve
the desired system frequency response.
… 8 …


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