Filter type on PLX amps

Moderators: Cameron Shoffner, Christian Cook, Kirk Fyvie, Martin Barbour, Gary Evans_QSC, QSC-Dale Sandberg

Tue Dec 07, 2010 10:33 am

  • What is the filter type and order on the PLX 1202 and PLX 1602 power amps ?
    jnewmark
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Wed Dec 08, 2010 11:29 am

  • The filter type is Butterworth and the order is 2nd.
    Thanh Nguyen
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    QSC Audio Products, LLC
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    Thanh Nguyen
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Wed Dec 08, 2010 12:40 pm

  • Thanks. I guess my next question would be, in a 3 way bass guitar cab loaded with 2 Eminence 3012LF woofers, what HPF setting on the PLX 1202 would be better, the 30 hz or 50 hz ?
    jnewmark
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Wed Dec 08, 2010 4:05 pm

  • What is the frequency response of your woofers?
    Thanh Nguyen
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    QSC Audio Products, LLC
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    Thanh Nguyen
    QSC Audio Products
     
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Wed Dec 08, 2010 7:38 pm

Thu Dec 09, 2010 12:31 pm

  • Thanks for the data sheet. The usable frequency range of the LF driver is 46Hz - 2.0kHz. HPF setting on the PLX 1202 would be 50 Hz, closest to 46 Hz.
    Thanh Nguyen
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    QSC Audio Products, LLC
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    Thanh Nguyen
    QSC Audio Products
     
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Thu Dec 09, 2010 8:27 pm

  • Thanh Nguyen wrote:Thanks for the data sheet. The usable frequency range of the LF driver is 46Hz - 2.0kHz. HPF setting on the PLX 1202 would be 50 Hz, closest to 46 Hz.


    Ok, thanks. When running the amp bridged, should both channel hpf's be switched to 50 hz ?
    jnewmark
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Fri Dec 10, 2010 11:14 am

  • No, only Ch1's HPF setting would affect the output. For best performance in bridged mono, Ch2's clip limiter should be OFF and Ch2 gain control should be set at minimum (fully counter clockwise). Use Ch1 gain control to set your desired output level. Below are suggested settings:

    SW1: CLIP LIMITER (optional)
    SW2: FILTER ON
    SW3: 50 Hz (match with your loudspeaker's frequency range)
    SW 4, 5, & 6: STEREO
    SW 7: BRIDGE MONO ON
    SW 8: 30 or 50 Hz (doesn't matter)
    SW 9: FILTER OFF (doesn't matter)
    SW 10: CLIP LIMITER OFF

    I hope this helps.
    Thanh Nguyen
    Service Development Engineer
    QSC Audio Products, LLC
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    Thanh Nguyen
    QSC Audio Products
     
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Fri Dec 10, 2010 12:00 pm



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