new subwoofer help

[hardcore_gamer99]

What is the setting of the crossover for front speakers?​

What is the crossover setting for Front speakers? If multichannel tracks with LFE sounded good, you may have the crossover set too low for the Fronts and were cutting the subwoofer off at the knees when playing two channel signals.

If everything was played in Direct mode and the subwoofer mode was set to LFE, not LFE+Main, no bass would have been sent to the subwoofer at all when playing two channel signals. There is much missing here concerning settings and signals used for playback.

crossover was 72hz with bass control. As both speakers and sub had most spl there in dirac graph

 

[hardcore_gamer99]

Agreed, the sub may be in opposite phase of the speakers. I don't know what else could cause such a steep dip in the crossover region.

its a room mode or standing wave in square room.

 

[everettT]

crossover was 72hz with bass control. As both speakers and sub had most spl there in dirac graph

Do you mean 70hz? Also, did I miss what your LCR are?

 

[hardcore_gamer99]

Do you mean 70hz? Also, did I miss what your LCR are?

not 70 its 72 as subwoofer and speakers have most spl at 72hz not 70. With bass control i set 72hz. I have no centre channel.

 

[everettT]

not 70 its 72 as subwoofer and speakers have most spl at 72hz not 70. With bass control i set 72hz. I have no centre channel.

No center, but what are the mains? Just trying to ascertain if the issue is in the crossover region or the room. You mentioned good low bass, so it's not subwoofer performance issue.

Sorry, I see the mains in your original post. id definitely move the crossover to the subs to around 90-100, after confirming the potential phase issue.

 

[Trell]

You have done something seriously wrong in your set up. I agree with Shady. You have to have done something idiotic to end up with a response like that. No idea what, but I can be certain there is idiocy at the bottom of this.

"You know you are a very rude type of bloke, mend your ways."

I wonder who wrote that?

 

[hardcore_gamer99]

No center, but what are the mains? Just trying to ascertain if the issue is in the crossover region or the room. You mentioned good low bass, so it's not subwoofer performance issue.

Sorry, I see the mains in your original post. id definitely move the crossover to the subs to around 90-100, after confirming the potential phase issue.

dali opticon 2 mk2. As subwoofer is sold there is no option in denon but to run fronts as full range now only

 

[ski2xblack]

That's a bummer. I think the fellows were on track with solving your issues. Well one of them, at least. Square room would still inflict it's damage. Your issue seems to occur at the crossover freq, which quite possibly could have been solved. That deep notch you measured indeed looks like a cancellation due to phase/polarity.

Consider an ideal 4th order crossover (slopes of 240db/oct, responses cross at -3db), or 2nd order (12/12, responses cross at -6db). If the levels, slopes, and polarity of the sub/mains crossover are correct, the response will sum flat at the crossover frequency. If the levels and slopes are correct, but polarity reversed, the crossover point will exhibit a deep, narrow notch at the crossover frequency. That looks suspiciously like what your measurement showed.

If you have REW (and it's helpful if your subs are in close proximity to your mains...in situ measurements can be a real mess), you can employ this phenomenon to empirically test your crossover settings.

 

[jarablue]

I have the same sub. My sub literally rattles the walls and is wicked good. You might have to look into how you are calibrating your entire system and placement of your gear. The PB 2000 Pro is a very good sub that should more than be enough. If my sub is working great as well as other owners of the pb 2000 pro, it's not the sub, I don't think getting new subwoofers is going to fix your problem. Try a sub crawl. Have you done any measuring of the frequencies with REW? Something isn't adding up on your end. That sub is killer powerful.

 

[lovinthehd]

I have the same sub. My sub literally rattles the walls and is wicked good. You might have to look into how you are calibrating your entire system and placement of your gear. The PB 2000 Pro is a very good sub that should more than be enough. If my sub is working great as well as other owners of the pb 2000 pro, it's not the sub, I don't think getting new subwoofers is going to fix your problem. Try a sub crawl. Have you done any measuring of the frequencies with REW? Something isn't adding up on your end. That sub is killer powerful.

"shaking the walls" isn't really a goal otoh..

 

[jarablue]

"shaking the walls" isn't really a goal otoh..

I'll take a good wall shake once and a while.

 

[hardcore_gamer99]

That's a bummer. I think the fellows were on track with solving your issues. Well one of them, at least. Square room would still inflict it's damage. Your issue seems to occur at the crossover freq, which quite possibly could have been solved. That deep notch you measured indeed looks like a cancellation due to phase/polarity.

Consider an ideal 4th order crossover (slopes of 240db/oct, responses cross at -3db), or 2nd order (12/12, responses cross at -6db). If the levels, slopes, and polarity of the sub/mains crossover are correct, the response will sum flat at the crossover frequency. If the levels and slopes are correct, but polarity reversed, the crossover point will exhibit a deep, narrow notch at the crossover frequency. That looks suspiciously like what your measurement showed.

If you have REW (and it's helpful if your subs are in close proximity to your mains...in situ measurements can be a real mess), you can employ this phenomenon to empirically test your crossover settings.

Subwoofer was never the issue. Its standing wave issue. No matter where i put the sub in front And no matter what crossover i sat 60 70 80 90 110 that null at 72hz to 78hz. Reason i sold is i camt move it again n again as i would have to put 2 subs diagonally opposite. As i run my ht on weekend only. Room width is only 10.75feet. i am now thinking of 2 sb 1000 pro Or should i go with pb 1000 pro x 2?

 

[Golfx]

Subwoofer was never the issue. Its standing wave issue. No matter where i put the sub in front And no matter what crossover i sat 60 70 80 90 110 that null at 72hz to 78hz. Reason i sold is i camt move it again n again as i would have to put 2 subs diagonally opposite. As i run my ht on weekend only. Room width is only 10.75feet. i am now thinking of 2 sb 1000 pro Or should i go with pb 1000 pro x 2?

You seem pretty impervious to reasons given by others. So why would you trust us with another recommendation?

 

[hardcore_gamer99]

You seem pretty impervious to reasons given by others. So why would you trust us with another recommendation?

Just tell me will 2 x sb 1000 pro pressurize the room well same as 1 pb 2000 pro?

 

[NINaudio]

the pb's will have more deep bass extension.

 

[hardcore_gamer99]

the pb's will have more deep bass extension.

It sounded bad in my original indian music cds. Deep bass was very good but normal songs which had 40 50hz it was bad bass. I also tried lfe+mains same issue.

 

[NINaudio]

It sounded bad in my original indian music cds. Deep bass was very good but normal songs which had 40 50hz it was bad bass. I also tried lfe+mains same issue.

Like you've already been told:

placement placement placement

and integration

 

[jarablue]

You didn't need to return your sub. You need to rearrange your room. That is the fix. Like everyone here has been telling you for awhile.

 

[William Lemmerhirt]

Just tell me will 2 x sb 1000 pro pressurize the room well same as 1 pb 2000 pro?

No. Not below 30-40hz. Above that, maybe.

You might get lucky and smooth the response some. But you can’t just drop two subs and expect it to be magically better. There’s a good chance it could get worse.

 

[William Lemmerhirt]

Like you've already been told:

placement placement placement

and integration

This is truth. The PB series is pretty darn flat.