Protection Function - Kenwood KAC-746 Instruction Manual

• STEREO position:
The amplifier can be used as a stereo amplifier.
• L+R position:
The input left and right signals are combined before being amplified. Use this position when the
unit is used for subwoofer speakers or the L+R (monaural) sound is required.
• MONO (Lch) position:
Amplifies the signal input from the left side only. Set to this position and make bridged
connections to use as a high-power monaural amplifier. (The input right signal is not output.)
! INPUT SENSITIVITY control
Set this control according to the pre-output level of the center unit
connected with this unit, or to the maximum power output of the genuine-
accessory car stereo.
Use the diagram on the right as a guide.
NOTE
For the pre-output level or the maximum power output, refer to the
"Specifications" in the instruction manual of the center unit.
@ RCA cable ground lead terminal
# INPUT SELECTOR switch
This switch selects the input method of the signals to be amplified by amplifiers A and B.
• A B position:
Amplifies both of the signals input to amplifiers A and B.
• A position:
Amplifies only signal input amplifier A with both amplifiers A and B.
$ Amplifier A LINE IN terminal
% Amplifier B LINE IN terminal
^ LINE OUT terminal
These jacks output respectively the signals input to amplifiers A and B. They always output
the stereo signals regardless of the position of the OPERATION switch.

Protection function

This unit is equipped with a protection function for protecting this unit and your
speakers from various accidents or problems that can occur.
When the protection function is triggered, the Power indicator goes off and the
amplifier stops operating.
Power indicator:
When the power is turned on, the Power indicator lights.
If the Power indicator does not light when the power is turned on, the
protection function may be activated. Check whether there is any
indication of trouble.
The protection function activates in the following
situations:
• When a speaker output contacts ground.
• When the unit malfunctions and a DC signal is sent to the speaker output.
• When the temperature of internal parts exceeds 120°C (248°F).
• When a ground cable of the center unit (cassette receiver, CD receiver,
etc.) or this unit is not connected to a metal part serving as an electrical
ground passing electricity to the battery's negative - terminal.
10
0.5 0.3
15
1.0
MIN MAX
25
(W)
Power indicator
5