Power indicator, Bfc (beat frequency control) switch – Pioneer GM-X944 User Manual

Page 5

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Power Indicator

The power indicator lights when the
power is switched on.

BFC (Beat Frequency Control) Switch

If you hear a beat while listening to an
MW/LW broadcast with your car stereo,
change the BFC switch using a small
standard tip screwdriver.

LPF (Low-Pass Filter)/HPF (High-Pass Filter)/BPF (Band-Pass Filter) and
LOW/HIGH Select Switch

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

LPF/HPF/BPF

Audio frequency range

Speaker

Remarks

and LOW/HIGH

to be output

Type

Select Switch

LPF

HIGH

*

1

— 3k to 9k Hz

Mid

Connect a mid range speaker.

LOW

*

1

— 40 to 120 Hz

Subwoofer

Connect a subwoofer.

HPF

HIGH

*

1

*

2

3k to 9k Hz —

Tweeter*

3

Connect a tweeter.

LOW

*

1

40 to 120 Hz —

Full range

Use if you want to cut the
very low frequency range*

1

because it is not necessary for
the speakers you are using.

BPF (for CH A)*

4

*

1

40 to 120 Hz —

Mid

Connect a mid range speaker.

— 3k to 9k Hz

OFF

Full range

Full range

*

1

See the “Cut Off Frequency Control” section.

*

2

With CH A, even if the setting is HPF-HIGH, you can only select the same cut off frequency as with
HPF-LOW (40 to 120 Hz).

*

3

If you connect the tweeter directly, you must set the CH B to HPF-HIGH.

*

4

Be sure to set the LOW/HIGH select switch to HIGH.

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