Pioneer GM-X404 Manuel d'entretien - Page 15

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GM-X404,x304

11. OPERATIONS AND CONNECTION(GM-X304/X1H/UC)

Setting of this Unit

(Fig. 19)

[1} Power Indicator

The power indicator lights when the

power is switched on.

[2] RCA Input Select Switch

For two-channel input, slide this switch

to the left. For four-channel input, slide

this switch to the right.

[3] BFC (Best Frequency Control) Switch

If you hear a beat while listening to an

AM broadcast with your car stereo,

change the BFC switch using a small

screwdriver.

(4) Input Level Adjustment

Adjusting the input level controls A and

8 will help match the output of the car

stereo to the Pioneer amplifier. Input

level control A is used to adjust the

volume of speaker output A; Input level

control B is used to adjust the volume of

speaker ouput B. Normally, set the

switch to the "500 mV" position. If the

output is low even when the volume of

the car stereo is turned up, turn these

controls clockwise. If there is distortion

when the volume of the car stereo is

turned up, turn these controls clockwise.

+ If you only use one input pin plug, set

the input level controls for speaker

outputs A and B to the same position.

* Set the input level control to 500 mV

when this amplifier is connected to a

Pioneer car stereo with RCA output

jacks. If the sound is too low or dis-

torts, adjust the input level control.

[5] Speaker Out A: LPF (Low-Pass Fitter)/

HPF (High-Pass Filter) Select Switch

Set the LPF/HPF select switch as follows

according to the type of the speaker that

is connected to the speaker output

connector and the car stereo system:

LPF/HPF

Select

Switch

Audio frequency

range to be output

OFF

Very-low-fr equency | Other than

(center) | "ange to high-

sub-woofer

frequency range

HPF

Low-frequency

(right) | range to high-

frequency range

Other than

sub-woofer

Set the LPF/HPF select switch to the HPF

(right) position if you want to cut the very-

low-frequency range because it is not

necessary for the speaker you use.

{6] Speaker Out A: Bass Boost Level

Control

Bass boost level contro! can boost the

level around 60 Hz to 0 to 12 dB.

110}

{10]

{8}

[9]

(14] {14} [13]

Com

[16] (15) 115)

[14}

115]

Fig. 20

* Bass boost level control can be adjusted

only when the LPF/HPF select switch is

set to a position other than HPF .

[7] Speaker Out B: HPF (High-Pass fitter)

Select Switch

Set the HPF select switch as follows

according to the car stereo systen and

the type of speaker connected tothe

HPF

Select

Audio frequency

Switch | "ange to be output

OFF

Very-low-frequency | Othr than

range to high-

frequency range

(left)

subwoofer

HPF

Low-frequency

{right) | range to high-

frequency range

Othr than

subwoofer

Set the HPF select switch to the HF: ( right)

position if you want to cut the venlow-

frequency range because it is not tecessary

for the speaker you use.

speaker output:

ee oe OR a