Bedienungsanleitung JL Audio XD1000 (Seite 4 von 41) (Englisch)

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6 | JL Audio - XD1200/1v2 Owner’s Manual

ENGLISH

In signal and DC sensing applications, the

amplifier’s “Remote” turn-on terminal becomes

a remote turn-on output. This allows the

XD1000/1v2 to turn on other amplifiers in the

audio system that do not have signal sensing.

INPUT SECTION

The XD1000/1v2 employs a differential-

balanced input topology that provides the user

with a high degree of input flexibility, while

retaining superior noise rejection. This type of

circuit also allows the XD1000/1v2 to accept high-

voltage inputs from factory source unit outputs

without excessive distortion or noise problems.

You may run a stereo or a mono signal into

the inputs of the amplifier. The amplifier’s input

section automatically sums stereo signals to mono

for the internal amplifier section. The amplifier

will operate with only one input connection

but will require an increase in input sensitivity

to overcome the loss of signal. If a mono input

signal is to be run, we recommend that you use

a “Y-adaptor” to split the mono signal into both

inputs of the amplifier. If you are feeding only

one input and using either the DC-Offset or

Signal Sensing “Turn-On Mode,” you must use

the left-channel input for the automatic turn-on

to operate.

Input Voltage Range:

Input Voltage Range: A wide range of signal

input voltages can be accommodated by the

XD1000/1v2’s input section (200mV – 8V).

This wide range is split up into two sub-ranges,

accessible via the “Input Voltage” switch:

“Low”: for preamp level signals

“High”: for speaker level signals

The “Low” position on the “Input Voltage”

switch selects an input sensitivity range between

200mV and 2V. This means that the “Input Sens.”

rotary control will operate within that voltage

window. If you are using an aftermarket source

unit, with conventional preamp level outputs, this

is the position you should select.

The “High” position on the “Input Voltage”

switch selects an input sensitivity range between

800mV and 8V. This is useful for certain high-

output preamp level signals as well as speaker

level output from source units and small

amplifiers. To use speaker level sources, splice the

speaker output wires of the source unit or small

amplifier onto a pair of RCA cables or plugs,

or use the JL Audio ECS Speaker Wire to RCA

adaptor (XD-CLRAIC2-SW).

Line Output Converters are usually not needed

with the XD1000/1v2. If you find that the output

cannot be reduced sufficiently with a direct

speaker level signal applied to the amplifier and

the “Input Voltage” switch in its “High” position,

you may use a Line Output Converter or voltage

divider to reduce the signal level.

TURNON OPTIONS

The XD1000/1v2 can be switched on and off

using one of three methods, determined by the

position of the amplifier’s “Turn-On Mode”

switch. Please read these options and decide

which is best suited for your specific system.

1) +12V remote turn-on lead (preferred)

2) Signal-sensing turn-on circuit

3) DC offset-sensing turn-on circuit

+12 V Remote Turn-On: This is the preferred

method for turning the amplifier on/off. The

amplifier will turn on when +12 V is present at

its “Remote” input and turn off when +12 V is

switched off. This +12 V remote turn-on signal is

typically controlled by a source unit's remote

turn-on wire. The XD1000/1v2’s “Remote” turn-

on connector will accept 18 AWG – 12 AWG

wire. To connect the remote turn-on wire to

the amplifier, first back out the set screw on the

top of the terminal block, using the supplied 2.5

mm hex wrench. Strip 1/2 inch (12mm) of wire

and insert the bare wire into the terminal block,

seating it firmly so that no bare wire is exposed.

While holding the wire in the terminal, tighten

the set screw firmly, taking care not to strip the

head of the screw and making sure that the wire

is firmly gripped by the set screw.

If a source unit does not have a dedicated

remote turn-on output, consider one of the

following alternative turn-on options:

These methods are useful when a conventional

+12 V remote turn-on signal is not available in a

system. These allow you to operate the amplifier

without having to locate a remote turn-on lead at

the source unit, which can be very useful when

interfacing the amplifier with OEM (factory)

audio systems that do not use conventional +12 V

turn-on leads.

Depending on the characteristics of the audio

signal, one of the following methods may work

better than the other. We recommend trying DC

Offset-Sensing first as it does not require a long

delay to turn the system off after the signal is

shut off.

DC Offset-Sensing: The amplifier will turn on

and off by detecting the presence of a very small

DC signal (offset) that is typical in the audio

output of most OEM (factory) source units and

amplifiers. The amplifier will turn on and off in

reaction to the presence or absence of this DC

Offset. The sensitivity of this circuit is designed

for high-level (speaker level) signals, not for low-

level (preamp level) signals. The circuit senses the

left-channel signal only.

Signal-Sensing: The amplifier will turn on and

off by detecting the presence of a full-range

audio signal at its left-channel input. After

approximately 30 seconds, the amplifier will shut

off. The sensitivity of this circuit is designed for

high-level (speaker level) signals, not for low-level

(preamp level) signals. The circuit is tuned to

react to signals at mid-range frequencies. This

prevents false switching from signals created by

moving loudspeakers that are in parallel with the

amplifier’s input signal.

JL Audio XD1000 Seite 4

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