Bedienungsanleitung JL Audio xd700 (Seite 8 von 24) (Englisch)

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8 | JL Audio - XD700/5v2 Owner’s Manual

To properly set the amplifier for maximum

clean output, please refer to Appendix A (page

16) in this manual. After using this procedure,

you can then adjust any or all “Input Sens.”

levels downward if this is required to achieve the

desired system balance.

Do not increase any “Input Sens.” setting for

any channel(s) of any amplifier in the system

beyond the maximum level established during

the procedure outlined in Appendix A (page

16). Doing so will result in audible distortion

and possible speaker damage.

FILTER CONTROLS

Most speakers are not designed to reproduce

the full range of frequencies audible by the human

ear. For this reason, most speaker systems are

comprised of multiple speakers, each dedicated

to reproducing a specific frequency range. Filters

are used to select which frequency range is sent

to each section of a speaker system. The division

of frequency ranges to different speakers can be

done with passive filters (coils and/or capacitors

between the amplifier outputs and the speakers),

which are acceptable and commonly used

for filtering between mid-range speakers and

tweeters. Filtering between subwoofer systems

and satellite speaker systems is best done with

active filters, which cut off frequency content at

the input to the amplifier. Active filters are more

stable than passive filters and do not introduce

extraneous resistance, which can degrade

subwoofer performance.

The active filter built into each channel section

of the XD700/5v2 can be used to eliminate

potentially harmful and/or undesired frequencies

from making their way through the amplifier

sections to the speaker(s). This serves to improve

tonal balance and to avoid distortion and possible

speaker failure. Correct use of these filters can

substantially increase the longevity and fidelity of

your audio system.

1) “Filter Mode” Controls: The XD700/5v2

employs 12dB per octave filters for each pair

of main channels (one high-pass filter for

channels 1&2 and another high-pass / bandpass

filter for channels 3&4. The subwoofer channel

provides a low-pass filter with the option of

12dB or 24dB / octave slopes. Each of these

filters can be controlled or defeated completely

by way of the three-position “Filter Mode”

switches in each channel section:

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 from 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.

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JL Audio xd700 Seite 8

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