Setting Gain Properly; Gain Control; Relationship Between Amplifier Gain And Head Unit Output Power; Signal Waveform When Outputting At High Volume Using Amplifier Gain Control - Pioneer GM-A5702 Owner's Manual

(Setting the unit
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
GAIN
(Standard: 500 mV)
-NORMAL
Preout level: 4 V -
HIGH~
6.5V 0.3V
Above illustration shows NORMAL gain set-
ting.
Relationship between amplifier gain
and head unit output power
Power.....-------. Power..--------.
I I
Maximum gain
I
--Equal power ----
Head unit volume steps Head unit volume steps
Amplifier gain
-------~
Amplifier gain
(normal) (maximum)
En
If amplifier gain is raised improperly, this will
simply increase distortion, with little increase
in power.
Signal waveform when outputting at
high volume using amplifier gain
control
Normal gain
• • • • • Equal power • • •
Amplifier gain ------~Amplifier gain
(normal) (maximum)
If the signal waveform is distorted due to high
output even if the amplifier gain is raised, the
output power will change only slightly.[!]