PIONEER GM-X422/XR/ES
Manual de Servicio

GM-X422, GM-X322

16

Gain Control Power Indicator
The power indicator lights If sound is too low, even when the

volume of the car stereo used along with power is switched on. this power amplifier is turned up, turn gain control on back of the power amplifier clockwise. If the sound distorts when the volume is turned up, turn the gain control counter-clockwise.

- SETTING THE UNIT

� Set the gain control to �NORMAL� when BFC (Beat Frequency Control)

this amplifier is connected to a Pioneer car stereo with RCA output jacks. If the sound Switch is too low or distorts, adjust the gain control. (ES and EW models)

8. OPERATIONS AND SPECIFICATIONS

If you hear a beat while listening to an AM broadcast with your car stereo, change the BFC switch using a small screwdriver.

LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch

Set LPF/HPF select switch as follows according to type of the that is connected to speaker output connector and the car stereo system:

LPF/HPF Select Audio frequency range Speaker Remarks Switch to be output Type

LPF (left) Very-low-frequency range Sub-woofer Connect a sub-woofer.

OFF (center) Full range

Bass Boost Level Control
Bass control can boost the level because it is not necessary control. around frequency selected by the bass � Level Control, Bass Boost for the speaker you use. boost frequency control 0 to 12 dB. Frequency Control can be adjusted only

Bass Boost Frequency Control (GM-X422)

HPF (right) Low-frequency range Tweeter If you want to cut the veryYou can select a bass boost frequency

high-frequency low-frequency range from 40 to 120 Hz with the bass boost

when the LPF/HPF select switch is set to a position other than HPF.

Fig. 8