Is there any way...

  • Thread starter PS
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PS

PS

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...to help fix "group delay"?

It seems the system I just bought has a subwoofer with MASSIVE group delay (gd = the amount of time (in ms) it takes for the subwoofer to respond to a signal).

It just seems to thump instead of actually provide bass with the flow of the sound, and it's a good .3-.5s slower than the beat of the song.
 
PS
...to help fix "group delay"?

It seems the system I just bought has a subwoofer with MASSIVE group delay (gd = the amount of time (in ms) it takes for the subwoofer to respond to a signal).

It just seems to thump instead of actually provide bass with the flow of the sound, and it's a good .3-.5s slower than the beat of the song.
Click to expand...
Is it a bandpass subwoofer box? (The speaker driver inside a box)
 
PS
I don't think so. Isn't that just like a single-reflex sub?
Click to expand...
OK, then check you BASS MANAGEMENT SYSTEM on your stereo. There will be something called PHASE SWITCHING. Experiment with it. There might be one on the woofer box as well. It might read something like "LFE" or "LFE MIX LEVEL," or something like that. Just adjust settings until the delay goes away.

If there is no phase switching available to you, or LFE adjust for delay, check other areas for any "Sound Delay Processing." Sometimes, stereo will have audio delays to combat poor video processing speeds. So, they add audio delays to the signal so the video images can "catch up."

If there are no delay adjustments available to you, reverse the polarity connection of the speaker wires to the subwoofer, if there any. I'd be surprised if there were. Is this a store bought subwoofer, or homemade?
 
Solid Lifters
OK, then check you BASS MANAGEMENT SYSTEM on your stereo. There will be something called PHASE SWITCHING. Experiment with it. There might be one on the woofer box as well. It might read something like "LFE" or "LFE MIX LEVEL," or something like that. Just adjust settings until the delay goes away.

If there is no phase switching available to you, or LFE adjust for delay, check other areas for any "Sound Delay Processing." Sometimes, stereo will have audio delays to combat poor video processing speeds. So, they add audio delays to the signal so the video images can "catch up."

If there are no delay adjustments available to you, reverse the polarity connection of the speaker wires to the subwoofer, if there any. I'd be surprised if there were. Is this a store bought subwoofer, or homemade?
Click to expand...


It's a Sony "Digital Audio/Video Control Center".

I think the model is STR-K740P. I couldn't find any Bass adjustments other than those that control how much of it there is. I bought at a Hock Shop, it had been refurbished. If it helps, it's the 5.1 500 watt one. It never came with a manual so I'm clueless here.

Any help would be appreciated 👍.
 
http://129.33.22.12/release/strk740p.pdf

Looking through the manual, I see nothing about a delay management system. I also see no reason why the subwoofer signal would be delayed either.

Are the speaker parameters set up correctly? Even if they weren't, I don't think you should have that much of a delay problem. Make sure the subwoofer parameter setting isn't set to far away. Also, check to see if you're running any sound field settings or effects. Selecting Hall, or Stadium can cause a delay in surround signals, but I'm not sure about subwoofer signals.

Other than that, I say you have a defect. This was a serviced receiver you say? I think I know why it was sent in.

Good luck.


Oh, read pages 20 and 29 for subwoofer information.
 
Solid Lifters
http://129.33.22.12/release/strk740p.pdf

Looking through the manual, I see nothing about a delay management system. I also see no reason why the subwoofer signal would be delayed either.

Are the speaker parameters set up correctly? Even if they weren't, I don't think you should have that much of a delay problem. Make sure the subwoofer parameter setting isn't set to far away. Also, check to see if you're running any sound field settings or effects. Selecting Hall, or Stadium can cause a delay in surround signals, but I'm not sure about subwoofer signals.

Other than that, I say you have a defect. This was a serviced receiver you say? I think I know why it was sent in.

Good luck.


Oh, read pages 20 and 29 for subwoofer information.
Click to expand...


I read somewhere (I think P.A.S.Mag) that the size of the enclosure also affects how quickly/efficiently responds. Would it create that much of a difference in a 1 foot sub?
 
PS
I read somewhere (I think P.A.S.Mag) that the size of the enclosure also affects how quickly/efficiently responds. Would it create that much of a difference in a 1 foot sub?
Click to expand...
No. The speed of sound, and the lower frequencies don't get delayed that much. It sounds like a delay in the signal processing for the subwoofer output.
 
Solid Lifters
No. The speed of sound, and the lower frequencies don't get delayed that much. It sounds like a delay in the signal processing for the subwoofer output.
Click to expand...

No? Not even air resonance?

Ah well.

Still, that's kind of screwy. I'll try it with my other sub and see if maybe it's

A) my xbox

B) the TV

or C) it's the new system.

[edit]
Also went here, but no such luck. :(

http://209.59.135.61/viewtopic.php?topic=21585&forum=51


...oh, and you wouldn't happen to know how to program the remote, would you? :lol:
 

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