Pioneer GM-A3602: Setting the unit

Section

02

Setting the unit

2 FREQ (cut off frequency) control

What’s what

Cut off frequency selectable from 40 Hz to

GM-A5602

500 Hz if the LPF select switch is set to ON.

Front side

3 BASS BOOST (bass boost level control)

switch

You can select a bass boost level from 0 dB,

6 dB and 12 dB.

4 GAIN (gain) control

If output remains low, even when the car

Rear side

stereo volume is turned up, turn controls to

lower level. If distortion occurs when the car

stereo volume is turned up, turn these con-

trols to higher level.

! For use with an RCA equipped car stereo

(standard output of 500 mV), set to the

NORMAL position. For use with an RCA

GM-A3602

equipped Pioneer car stereo, with maxi-

Front side

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 HIGH posi-

tion.

! If you hear too much noise when using

the speaker input terminals, turn the

Rear side

gain control to higher level.

5 Power indicator

The power indicator lights up to indicate

power ON.

To adjust the switch, use a flathead screwdri-

ver if needed.

Setting gain properly

! Protective function included to prevent

1 LPF (low-pass filter) switch

malfunction of the unit and/or speakers

Switch the settings based on the connected

due to excessive output, improper use or

speaker.

improper connection.

! When the Subwoofer is connected:

! When outputting high volume sound etc.,

Select ON. This eliminates high range

this function cuts off the output for a few

frequency and outputs low range fre-

seconds as a normal function, but output

quency.

is restored when the volume of the head

! When the full range speaker is con-

unit is turned down.

nected:

Select OFF. OFF outputs the entire fre-

quency range.

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Section

Setting the unit

02

English

! A cut in sound output may indicate impro-

If the signal waveform is distorted due to high

per setting of the gain control. To ensure

output, even if the amplifier gain is raised, the

continuous sound output with the head

output power will change only slightly.

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.

Signal waveform when outputting at

high volume using amplifier gain

control

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