JL Audio XD700/5 - Manual (Page 8)

8 | JL Audio - XD700/5 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 sedans and
coupes with trunks.
“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
SUV’s, wagons and hatchbacks.
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 XD700/5
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.