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Aske???

 
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Teed
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Aske???
« on: December 26, 2006, 10:25:32 AM »

What's the best way to fine tune my sub? JBL E250 series. I can't seem to dial it in.  It nothing like it was in the other house.  Mind you, I didn't install/configure sub in other house.
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Aske
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Re: Aske???
« Reply #1 on: December 26, 2006, 10:28:17 AM »

not sure exactly what you mean
(volume, frequency, imaging, etc)?


also, what are the differences again between  wood/carpet,   walls,   etc ?
what receiver is driving it?
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Re: Aske???
« Reply #2 on: December 26, 2006, 10:35:13 AM »

not sure exactly what you mean
(volume, frequency, imaging, etc)?


also, what are the differences again between  wood/carpet,   walls,   etc ?
what receiver is driving it?


Volume is fine. Freq and imaging may be the issue. Just not clear.

Carpet, walls no acoustic treatment, sub is located in rear of room.
Denon AVR
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Aske
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Re: Aske???
« Reply #3 on: December 26, 2006, 01:11:06 PM »

well, not an expert with JBL subs...

but a quick net search reveals a 250 watt powered integrated amp in a front firing cabinet.


so you might have several issues.

the room you showed is pretty 'squarish'  at least in the pic you showed it seemed that way

imaging can definitely be an issue if your speakers are out of phase/sync with the sub, and if you don't tune them correctly to whatever crossover you set.   with a denon receiver, you should be able to do this certainly.  i imagine this is your biggest problem,  but you might also try putting it in front center, too.

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Russia has invaded a sovereign neighboring state and threatens a democratic government elected by its people. Such an action is unacceptable in the 21st century.
--  Chimpy McFlightsuit, CEO of Bu$hco Industries of 'Merka
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Re: Aske???
« Reply #4 on: December 26, 2006, 05:42:11 PM »

well, not an expert with JBL subs...

but a quick net search reveals a 250 watt powered integrated amp in a front firing cabinet.


so you might have several issues.

the room you showed is pretty 'squarish'  at least in the pic you showed it seemed that way

imaging can definitely be an issue if your speakers are out of phase/sync with the sub, and if you don't tune them correctly to whatever crossover you set.   with a denon receiver, you should be able to do this certainly.  i imagine this is your biggest problem,  but you might also try putting it in front center, too.



Thx for taking the time to do a little research.

I can't do much about the room unless I add bass traps in the corners.  I also cant move the sub b/c idiot contractors put the coaxial wire in back instead of front as instructed. I'll run through the Denon AVR setup again and see if I can get a better sound.
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Aske
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Re: Aske???
« Reply #5 on: December 26, 2006, 06:06:49 PM »

well, not an expert with JBL subs...

but a quick net search reveals a 250 watt powered integrated amp in a front firing cabinet.


so you might have several issues.

the room you showed is pretty 'squarish'  at least in the pic you showed it seemed that way

imaging can definitely be an issue if your speakers are out of phase/sync with the sub, and if you don't tune them correctly to whatever crossover you set.   with a denon receiver, you should be able to do this certainly.  i imagine this is your biggest problem,  but you might also try putting it in front center, too.



Thx for taking the time to do a little research.

I can't do much about the room unless I add bass traps in the corners.  I also cant move the sub b/c idiot contractors put the coaxial wire in back instead of front as instructed. I'll run through the Denon AVR setup again and see if I can get a better sound.

if its a modern (and not the absoulte cheapest model offered)  denon  you can set inside of it the  frequency range it sends to the LFE.  set your sub crossover to the same value.  adjust the sub volume incrementally till it blends. 

your sub (couldnt find this online)  may have a built in phase shift.  if it does, you wont be able to  correct that.

and finally, again, i think your sub as a 'front/side fire' will also sound much much better in front of you than behind you. downfires go behind you
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--  Chimpy McFlightsuit, CEO of Bu$hco Industries of 'Merka
Aske
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Re: Aske???
« Reply #6 on: December 26, 2006, 06:08:18 PM »

also,  if you're every going to invest in high $ speaker wire, it should be for a sub cable if its more than about 3-5 feet.

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--  Chimpy McFlightsuit, CEO of Bu$hco Industries of 'Merka
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Re: Aske???
« Reply #7 on: December 26, 2006, 06:24:27 PM »

also,  if you're every going to invest in high $ speaker wire, it should be for a sub cable if its more than about 3-5 feet.



sub is connected w/ RG6 coax.
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Re: Aske???
« Reply #8 on: December 26, 2006, 06:40:38 PM »

I'm going to try the following tomorrow.  recommended by many on the avs forum

http://www.hometheatershack.com/roomeq/

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