700442
9
Zoom out
Zoom in
Previous page
1/24
Next page
9
AMPLIFIER INPUTS
The HD750/1 has a single input section
consisting of a pair of RCA-type input jacks on
the Connection Panel of the amplifier and a
pair of input controls on the Control Panel of
the amplifier: an “Input Voltage” switch and an
Input Sens.” rotary control.
Remote
Level
Control
Inputs
L
R
L
R
+12 VDC Ground Remote
Preouts
+12 VDC Ground Remote
The HD750/1 features stereo inputs, even
though it is a mono amplifier. This has been
done to permit the amplifier to sum stereo
input signals to mono, which is particularly
useful for driving subwoofers. Even if you
have a dedicated mono subwoofer signal
available or are feeding a left channel only or
a right channel only into the amplifier, you
must feed both inputs of the HD750/1.
Connection of only one RCA input will result
in reduced power output, increased distortion
and can cause the amplifier to overheat. To
connect a mono signal to both inputs, use
an RCA “Y-Adaptor” (sold separately).
INPUT CONTROLS
On the amplifier’s control panel you will find
an “Input Voltage range switch and a rotary
control labeled “Input Sens.” (Input Sensitivity).
These controls are designed to match the input
sensitivity of the HD750/1 to the specific signal
source that is feeding it and must be adjusted,
with care, following the procedures outlined in
this manual. Failure to make correct adjustments
can result in weak output, excessive distortion
and/or undesirable noise in the audio output of
the amplifier!
“Input Voltage” Switch
A wide range of signal input voltages can be
accommodated by the HD750/1s differential-
balanced inputs (200mV – 8V RMS). This wide
range is split up into two sub-ranges, accessible via
the Input Voltage switch. 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 preamp-
level outputs, this is most likely the position that
you will use (regardless of what voltage output
capability is claimed by the source unit).
The High position on the Input Voltage
switch selects an input sensitivity range between
800mV and 8V. This is for use with speaker-level
outputs from source units and small amplifiers
found in many OEM (factory-installed) systems.
To use speaker-level sources, splice the speaker
output wires of the source unit or small amplifier
onto a pair of RCA plugs for each input pair
or use the JL Audio ECS Speaker Wire to RCA
adaptor (XB-CLRAIC2-SW).
9


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for JL Audio HD750 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of JL Audio HD750 in the language / languages: English as an attachment in your email.

The manual is 1,22 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info