Bedienungsanleitung JL Audio M700 (Seite 12 von 20) (Englisch)

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12 | JL Audio - M700/5 Owner’s Manual

SYSTEM CONFIGURATIONS

The M700/5 is a very flexible amplifier, well-

suited for a multitude of system configurations. In

this section, the most likely configurations for a

system with a single M700/5 are explained in detail.

Once you have selected your desired

configuration, you can use the amplifier panel

drawing on pages 18 & 19 to mark the required

switch positions for easy reference.

BIAMPLIFIED SYSTEMS

Bi-amplified systems are defined as systems

in which separate amplifier channels drive low-

frequency (LF) and high-frequency (HF) speakers

and are separately filtered to send appropriate

frequency ranges to each speaker system.

The most common application of

bi-amplification in mobile audio is to drive a

subwoofer system from one or more amplifiers or

channels and component speakers from separate

amplifiers or channels.

The M700/5 can be configured to drive a

bi-amplified system by itself.

Bi-Amplified System with one M700/5

In this configuration, the Subwoofer Channel

of the M700/5 will drive a subwoofer system with

low-pass filtering. The Main Channels (1&2, 3&4)

will drive component speakers in stereo with

high-pass filtering.

Crossover Setup for Bi-Amplified System

with one M700/5:

Once the input sections have been configured

appropriately (see page 6), go to the “SUB CH.”

control section and select “12dB” or “24dB”

(low-pass) on the “LP Filter Mode” switch and

an appropriate “Filter Freq.” (80 Hz is a good

starting point). The “12dB” setting engages a

shallow filter slope that gradually attenuates

frequencies above the selected “Filter Freq.”

setting. The “24dB” setting engages a sharper

filter slope that more aggressively attenuates

frequencies above the selected “Filter Freq.”

setting. Neither setting is “better”, but in general,

the shallower “12dB” setting is more desirable

for a subwoofer having to interface with smaller

main speakers (6.5-inch or smaller). The sharper

“24dB” setting is typically better when interfacing

with larger main speakers, like our 7.7-inch

components and coaxials. Experiment to find

the slope setting that results in the smoothest

subwoofer to midbass transition.

Next, turn your attention to the “CH 1 & 2”

Controls and select “x1” (high-pass) on the “HP

Filter Mode” switch and select an appropriate

“Filter Freq.” (again, 80 Hz is a good starting

point). The “x1” setting means that the Filter

Freq. indicated on the dial is exactly what you are

selecting. (In the “x10” mode, the actual Filter

Frequency is ten times higher than the indicated

value. This setting is generally not used in

bi-amplified systems.)

Finally, turn your attention to the “CH 3 & 4”

Controls and select “HP” (high-pass) on the “Filter

Mode” switch and select an appropriate “Filter

Freq.” (again, 80 Hz is a good starting point).

Tri-Amplified Systems with one M700/5

The M700/5’s 3-way crossover capability

allows you to create true, tri-amplified systems by

selecting the appropriate settings described below.

In a tri-amplified configuration, the

Subwoofer Channel of the M700/5 will drive

a subwoofer system, in mono, with low-pass

filtering. Channels 3 & 4 will drive component

woofers (or mid-range speakers) in stereo

with bandpass filtering (both a high-pass

and a low-pass filter applied). Channels 1 & 2

will drive high-frequency speakers (tweeters,

typically), in stereo, with high-pass filtering.

To operate a single M700/5 in Tri-Amplified

mode, set the “Input Mode” switch in “2 Ch.”

mode, and apply a single set of stereo inputs to the

Ch. 1 & 2 Inputs only!

Crossover Setup for Tri-Amplified System

with one M700/5:

First go to the “SUB CH.” control section

and select “12dB” or “24dB” (low-pass) on the

“LP Filter Mode” switch and an appropriate

“Filter Freq.” (80 Hz is a good starting point). The

“12dB” setting engages a shallow filter slope that

gradually attenuates frequencies above the selected

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