Pioneer GM-5500T: Setting the unit

Section

02

Setting the unit

output of 4 V or more, adjust level to

What’s what

match that of the car stereo output.

Front side

! If you hear too much noise when using

the speaker input terminals, turn the

gain control to higher level.

5 Power indicator

The power indicator lights up to indicate

Rear side

power ON.

Setting gain properly

! Protective function included to prevent

To adjust the switch, use a flathead screwdri-

malfunction of the unit and/or speakers

ver if needed.

due to excessive output, improper use or

improper connection.

1 LPF (low-pass filter) switch

! When outputting high volume sound etc.,

Switch the settings based on the connected

this function cuts off the output for a few

speaker.

seconds as a normal function, but output

! When the Subwoofer is connected:

is restored when the volume of the head

Select ON. This eliminates high range

unit is turned down.

frequency and outputs low range fre-

! A cut in sound output may indicate impro-

quency.

per setting of the gain control. To ensure

! When the full range speaker is con-

continuous sound output with the head

nected:

unit at a high volume, set amplifier gain

Select OFF. OFF outputs the entire fre-

control to a level appropriate for the preout

quency range.

maximum output level of the head unit, so

that volume can remain unchanged and to

2 FREQ (cut off frequency) control

control excess output.

Cut off frequency selectable from 40 Hz to

! Despite correct volume and gain settings,

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

the unit sound still cuts out periodically. In

such cases, please contact the nearest

3 BASS BOOST (bass boost level control)

authorized Pioneer Service Station.

switch

You can select a bass boost level from 0 dB,

Gain control of this unit

6 dB and 12 dB.

4 GAIN (gain) control

If output remains low, even when the car

stereo volume is turned up, turn controls to

Preout level: 2 V

(Standard: 500 mV)

lower level. If distortion occurs when the car

stereo volume is turned up, turn these con-

Above illustration shows NORMAL gain set-

trols to higher level.

ting.

! 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 max.

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Section

Setting the unit

02

English

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

Signal waveform distorted with high output, if

you raise the gain of the amplifier the power

changes only slightly.

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