Jbl-professional MPC-XU User Manual download pdf (Page 5)

IV. Typical configurations

Subsonic Filter (Infrasonic Filter)

Applications: Subsonic filters are commonly used in sound installations to filter out rumbles

and other inaudible or unwanted low frequency signals and to protect speaker tuned vented

speakers from damage due to excessive energy below the tuning frequency.

For a subsonic filter, determine the lowest useable frequency that the speaker can safely

handle and set the high-pass filter to that frequency. Typical subsonic filters are set at 50 Hz, 40

Hz, 30 Hz or 20 Hz.

Program settings:

1 Set Jx01 to bypass the low-pass filter (if not using) by placing jumper across pins 1 and 2.

2 Set Jx02 to enable the high-pass filter by placing jumper across pins 2 and 3.

3 No jumper on Jx03.

4 Insert proper resistor network in RNx04 socket.

2&1sniP3&2sniPenoN

noitcnuFredaeH

:1lennahC

ssap-wolssapyB101JX

ssap-wolelbanE101JX

ssap-hgihssapyB201JX

ssap-hgihelbanE201JX

tsoobnrohDCelbasiD301JX

zHk02@Bd6+,tsoobnrohDC301JX

zHk02@Bd01+,tsoobnrohDC301JX

:2lennahC

ssap-wolssapyB102JX

ssap-wolelbanE102JX

ssap-hgihssapyB202JX

ssap-hgihelbanE202JX

tsoobnrohDCelbasiD302JX

zHk02@Bd6+,tsoobnrohDC302JX

zHk02@Bd01+,tsoobnrohDC302JX

The table at left is a summary of the jumper

settings for the MPC-XU.

CD Horn Equalization (Boost)In addition to enabling the high-pass filter at Jx02, if you

opt for CD horn equalization you must place a jumper at Jx03 as well. The MPC-XU offers

two equalization curves for CD horn correction:

 For +6 dB of boost at 20 kHz, place the jumper across pins 1 and 2 of Jx03.

 For +10 dB of boost at 20 kHz, place the jumper across pins 2 and 3 of Jx03.

 To bypass the CD Horn Equalization, do not place a jumper in one position or the other.

1 2 3 4 5 6 7 8

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Jbl-professional MPC-XU User Manual Page 5