Just a LFE question for a DSW Pro 550wi

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Hey all was fortunate enough to get passed on some HI FI gear which consists of Klipsch RP 6000 L/R along with a Polk DSW 550i sub which is connected to a CXA81 integrated Amp which IIRC has no proper bass management like a AV receiver.

The connection is as follows single RCA cable from Sub out(CXA81) to LFE(SUB) ive tried 0-180 phase settings and adjusting the LPF filter at the back of the sub but no setting seems to fix the Balloon bloated bass like its awful lol.

I have heard conflicting responses from adjusting the LPF knob to 80hz or 120hz or matching the lowest frequency of your speakers which for the RP 6000 is 34hz +/-3db

Problem is the LFP knob bottoms out at only 60hz, should i try a RCA connection or get some sort of room correction?

Thankyou all sorry if its long.

Best Answer

  • SeleniumFalcon
    SeleniumFalcon Posts: 3,556
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    I usually suggest taking the low frequency capability of the main speakers (34Hz) and doubling it (68Hz) as a beginning crossover point. Manufacturers tend to be generous to themselves when publishing frequency response numbers, so higher might be necessary, but it's a good start. The goal is to have a smooth blending between the subwoofer and the rest of your system. Someone not familiar with your system would not know it's playing. This takes some time and patience and carefully listening to something with well recorded bass,

Answers

  • SeleniumFalcon
    SeleniumFalcon Posts: 3,556
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    Hello,
    Welcome to Polk's forum. It is possible the cause of the problem is related to the subwoofer's placement in the listening room. Proximity to walls and corners cause dramatic changes to the sound quality of any subwoofer. Where is the subwoofer located in the room?
  • james240
    james240 Posts: 3
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    Hey mate thankyou so much for replying! its in the corner of the room and im using the corner preset in the Polk Room optimizer.

    But yer its snugged deep in the corner should i put it more towards the middle of the room? would you happen to know if its just the AMP not having proper bass management? should i just unplug the Sub?
  • SeleniumFalcon
    SeleniumFalcon Posts: 3,556
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    Corner placement is going to emphasize bass waves and cause the most interaction with the room's peaks and nulls in bass response. As a test try bringing the sub out into the room as much as possible and see how that changes the sound.
  • james240
    james240 Posts: 3
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    Thanks again mate will try repositioning what about LPF would 60hz be okay as the sub won't go lower.