Setting Gain Properly - Pioneer GM-D8704 Owner's Manual

Setting the unit
If the output remains low, even when the car
stereo volume is turned up, turn the con-
trols to a lower level. If distortion occurs
when the car stereo volume is turned up,
turn these controls to a higher level.
If using only one input plug, set the gain
controls for speaker outputs A and B to
the same position.
For use with an RCA equipped car stereo
(standard output of 500 mV), set to the
NORMAL position. For use with an RCA
equipped Pioneer car stereo, with maxi-
mum output of 4 V or more, adjust level
to match that of the car stereo output.
For use with an RCA equipped car stereo
with output of 4 V, set to the H position.
4 LPF (low-pass filter)/HPF (high-pass fil-
ter) select switch
Switch the settings based on the connected
speaker.
When the Subwoofer is connected:
Select LPF. This eliminates high range
frequency and outputs low range fre-
quency.
When the full range speaker is con-
nected:
Select HPF or OFF. HPF eliminates low
range frequency and output high range
frequency. OFF outputs the entire fre-
quency range.
5 INPUT SELECT (input select) switch
Select 2CH for two-channel input and 4CH
for four channel input.
6 POWER/PROTECT indicator
The power indicator lights up to indicate
power ON.
If something is not normal, the indicator
turns red.

Setting gain properly

Protective function included to prevent
malfunction of the unit and/or speakers
due to excessive output, improper use or
improper connection.
When outputting high volume sound etc.,
this function cuts off the output for a few
seconds as a normal function, but output
is restored when the volume of the head
unit is turned down.
A cut in sound output may indicate impro-
per setting of the gain control. To ensure
continuous sound output with the head
unit at a high volume, set amplifier gain
control to a level appropriate for the preout
maximum output level of the head unit, so
that volume can remain unchanged and to
control excess output.
Despite correct volume and gain settings,
the unit sound still cuts out periodically. In
such cases, please contact the nearest
authorized Pioneer Service Station.
Gain control of this unit
Preout level: 2 V (Standard: 500 mV)
Preout level: 4 V
Above illustration shows NORMAL gain set-
ting.
Relationship between amplifier gain
and head unit output power
If amplifier gain is raised improperly, this will
simply increase distortion, with little increase
in power.
En