Official Power Sound Audio Thread.

[timcat4843]

Originally Posted by Tom V.

Correct,

As long as each of the three 15s on the Triax has unrestricted access to the room space...you are fine. "unrestricted" meaning an inch or two of clearance between the driver and something like a wall or sofa.

Tom V.
Power Sound Audio

Wouldn't the Triax have a tendency to sound "boomy" if placed in a corner,
or to close (an inch or two) to the side walls?

I've been told that subs should be placed at least a foot away from side walls
and not flush up against the walls in corners.

[Tom V.]

Originally Posted by timcat4843

Wouldn't the Triax have a tendency to sound "boomy" if placed in a corner,
or to close (an inch or two) to the side walls?

I've been told that subs should be placed at least a foot away from side walls
and not flush up against the walls in corners.

Every room is different but there are no "rules of thumb" that I am aware of with regards to keeping a set distance between a subwoofer and a corner.

I try to keep 1.5 to 2 inches of clearance between the driver and the nearest obstruction(wall, sofa, etc). But otherwise, I go as far into the corner as physically possible.

Was there some reasoning behind the idea of keeping "at least a foot" between the woof and the walls?

Tom V.
Power Sound Audio

[Steve]

Originally Posted by Tom V.

Every room is different but there are no "rules of thumb" that I am aware of with regards to keeping a set distance between a subwoofer and a corner.

I try to keep 1.5 to 2 inches of clearance between the driver and the nearest obstruction(wall, sofa, etc). But otherwise, I go as far into the corner as physically possible.

Was there some reasoning behind the idea of keeping "at least a foot" between the woof and the walls?

Tom V.
Power Sound Audio

I don't know where it came from, but I've seen that recommended on this site for as long as I've been a member here. Whether it's legit or not, I think it's one of those things that's been repeated enough that people just accept it. I never even thought to question it until this conversation came along.

[timcat4843]

Originally Posted by Tom V.

Was there some reasoning behind the idea of keeping "at least a foot" between the woof and the walls?

Placing the subwoofer to close to the walls tends to make them sound "boomy."
Placing them no less than a foot away from walls seems to work the best.

The best subwoofer placement options:

[Tom V.]

Originally Posted by timcat4843

Placing the subwoofer to close to the walls tends to make them sound "boomy."
Placing them no less than a foot away from walls seems to work the best.

The best subwoofer placement options:

I'd like to see real measurements in real rooms comparing a sub in a corner to other options rather than a cartoon..

Each room is different so I don't argue that placement other than *in* a corner can work best when considering a variety of room environments. I usually start with corner loading or nearfield. If I cannot get satisfactory FR/overall performance at this point the "sub crawl" could be next on deck.

http://www.nousaine.com/pdfs/Tale%20of%202%20Rooms.pdf

http://www.nousaine.com/pdfs/Multiple%20Subwoofers.pdf

http://www.nousaine.com/pdfs/2%20sub...he%20Round.pdf

These are a bit dated now (and limited in scope) but they are real measurements, in real rooms. As such they may be interesting. Also, the 1/4 wavelength approach has merit too....as does the "half wall" thought.

Tom V.
Power Sound Audio

[timcat4843]

Originally Posted by Tom V.

These are a bit dated now (and limited in scope) but they are real measurements, in real rooms. As such they may be interesting. Also, the 1/4 wavelength approach has merit too....as does the "half wall" thought.

In my case when I setup my SVS PB12-NSD subs, I placed one in the left front corner
and the other in the right from corner.
Leveled each sub individually to 75dB.
Then ran the full eight position Audyssey MultEQ XT32 with Sub EQ HT calibration.
The subs sounded "boomy."

So I took the advise of Big Daddy and moved both subs about a foot away
from the side walls and reran the Audyssey calibration.

THAT DID IT!!!

Gone was all the "boominess."
In its place I was left with tight, tuneful, reference bass.

[Silo5]

Originally Posted by timcat4843

In my case when I setup my SVS PB12-NSD subs, I placed one in the left front corner
and the other in the right from corner.
Leveled each sub individually to 75dB.
Then ran the full eight position Audyssey MultEQ XT32 with Sub EQ HT calibration.
The subs sounded "boomy."

So I took the advise of Big Daddy and moved both subs about a foot away
from the side walls and reran the Audyssey calibration.

THAT DID IT!!!

Gone was all the "boominess."
In its place I was left with tight, tuneful, reference bass.

Apparently, you didn't take ALL of Big Daddy's advice

Per Big Daddy:

If you have multiple subwoofers, you should adjust the level of each subwoofer below 75dB (e.g., 72dB or 73dB). Remember that the combined level of all the subwoofers in the room should be around 75dB and not the level of each one.

[Joshjp]

He likes the bass a LITTLE hot.....

[Magicmonger]

Originally Posted by Tom V.

Every room is different but there are no "rules of thumb" that I am aware of with regards to keeping a set distance between a subwoofer and a corner.

I try to keep 1.5 to 2 inches of clearance between the driver and the nearest obstruction(wall, sofa, etc). But otherwise, I go as far into the corner as physically possible.

Was there some reasoning behind the idea of keeping "at least a foot" between the woof and the walls?

Tom V.
Power Sound Audio

Most likely it's my room Tom, but I found with my XV15 that 12" from side and back wall sounded the best for me.

[timcat4843]

Originally Posted by Joshjp

He likes the bass a LITTLE hot.....

^^^^^
This

[Tom V.]

Originally Posted by timcat4843

In my case when I setup my SVS PB12-NSD subs, I placed one in the left front corner
and the other in the right from corner.
Leveled each sub individually to 75dB.
Then ran the full eight position Audyssey MultEQ XT32 with Sub EQ HT calibration.
The subs sounded "boomy."

So I took the advise of Big Daddy and moved both subs about a foot away
from the side walls and reran the Audyssey calibration.

THAT DID IT!!!

Gone was all the "boominess."
In its place I was left with tight, tuneful, reference bass.

Its room dependent. But I have yet to see any evidence that indicates corner loading = loud/boomy. In some rooms? Yes. In other rooms, no. You are exiting the max number of room modes which may or may not be a good thing. Again, very room(and seating position) dependent.

Do you have a SPL meter? It wouldn't surprise me if the first solution simply offered a higher bass level than the second.

Tom V.
Power Sound Audio

[Tom V.]

Originally Posted by Magicmonger

Most likely it's my room Tom, but I found with my XV15 that 12" from side and back wall sounded the best for me.

Each room is different..

There's reasoning behind the 1/4 wavelength idea, I just never heard of "you always have to keep a foot between sub and corner".

Also, I know most don't want to be bothered taking measurements...but without them....this is all just guessimations. Not that discussions like this cannot be fun, but there is rarely any progression in understanding the issue(s).

Tom V.
Power Sound Audio

[ellisr63]

Tom, Did the 2nd batch of Triax subs start shipping?

[Tom V.]

Originally Posted by ellisr63

Tom, Did the 2nd batch of Triax subs start shipping?

We split the next round of Triax drivers into 2 shipments in an attempt to expedite things as much as possible. The first half should arrive Monday/Tuesday. The second half will be a few days behind.

The first half should allow us to fulfill nearly all the orders remaining that were placed in August and September. The second half will cover all the orders up to today(11-8-2013) with a handful to spare. The next big shipment of drivers should be here in 5-6 weeks.

Tom V.
Power Sound Audio

[Joshjp]

Lets hope they come i cant wait anymore...

[cr136124]

Originally Posted by Joshjp

Lets hope they come i cant wait anymore...

Man, the wait must be killing you. But hang in there buddy, soon my friend....really soon!

[Joshjp]

TY, im trying to but its hard.

[mdanderson]

Well I got my new dual XV15s setup this weekend and I am very pleased with the performance of these fine subs. When I set the first one of them up, I was really disappointed with the sound and overall output of the bass so I knew something must be wrong with my 2800 cft room or the way I was setting things up.

I tried moving the sub to other places like the front of the room but that did help and I even did the sub crawl test again which pointed me to the original spot of my SVS PB12-plus, just to the right of my couch. I listened to my favorite MC music and something was still not right. It just didn't sound like my old sub.

I was about to email support at PSA when I remembered that I have a couple of peaks and nulls between 30 and 50Hz. I had been able to smooth those out with the PEQ function in the SVS, but I knew the XV15 did not have this option. I then decided to setup the other sub to see if that would help with the sound and that did the trick. I went with a mid side wall location.

Wow! The sound is much improved now with plenty of output and the response sounds smooth overall with good definition in the bass. I have each sub level balanced and the gain set to around 3 oclock for each sub and I got about a 4.5db increase with the combined subs. I then had to turn down the level in my Oppo player to match the main speakers.

I am using analog connections because music sounds so much better to me with my Oppo 105 and this configuration. I also use the analog for movies as well and the results are very nice. I tried some of my favorites MC sacd and dvd audio discs like Steely Dan's Gaucho and Donald Fagen's Morph the Cat. It sounds excellent and I also tried out a couple of blurays like LOTR FOTR opening scene. I get great extension in the bass and Star Trek-Into Darkness opening scene was very good also.

Thank you to Tom and Jim at PSA for making such excellent subs, and I am glad I decided to go the dual route with subs. It was worth the time and effort in selling my old SVS sub which was excellent as well. Glad to be a part of the PSA family now.

[Spurrier Sucks]

Originally Posted by mdanderson

Well I got my new dual XV15s setup this weekend and I am very pleased with the performance of these fine subs. When I set the first one of them up, I was really disappointed with the sound and overall output of the bass so I knew something must be wrong with my 2800 cft room or the way I was setting things up.

I tried moving the sub to other places like the front of the room but that did help and I even did the sub crawl test again which pointed me to the original spot of my SVS PB12-plus, just to the right of my couch. I listened to my favorite MC music and something was still not right. It just didn't sound like my old sub.

I was about to email support at PSA when I remembered that I have a couple of peaks and nulls between 30 and 50Hz. I had been able to smooth those out with the PEQ function in the SVS, but I knew the XV15 did not have this option. I then decided to setup the other sub to see if that would help with the sound and that did the trick. I went with a mid side wall location.

Wow! The sound is much improved now with plenty of output and the response sounds smooth overall with good definition in the bass. I have each sub level balanced and the gain set to around 3 oclock for each sub and I got about a 4.5db increase with the combined subs. I then had to turn down the level in my Oppo player to match the main speakers.

I am using analog connections because music sounds so much better to me with my Oppo 105 and this configuration. I also use the analog for movies as well and the results are very nice. I tried some of my favorites MC sacd and dvd audio discs like Steely Dan's Gaucho and Donald Fagen's Morph the Cat. It sounds excellent and I also tried out a couple of blurays like LOTR FOTR opening scene. I get great extension in the bass and Star Trek-Into Darkness opening scene was very good also.

Thank you to Tom and Jim at PSA for making such excellent subs, and I am glad I decided to go the dual route with subs. It was worth the time and effort in selling my old SVS sub which was excellent as well. Glad to be a part of the PSA family now.

Congrats! How does the PSA compare to the SVS? I think I asked before but why not a second SVS? Your Baylor team is scary looking by the way. I don't think Bama wants to see them.

[mdanderson]

Originally Posted by Spurrier Sucks

Congrats! How does the PSA compare to the SVS? I think I asked before but why not a second SVS? Your Baylor team is scary looking by the way. I don't think Bama wants to see them.

Thanks and hello Spurrier. Yes my alma mater is looking good this year and I am excited for them to be 8-0 so far, but they still have a pretty rough rest of the schedule.

I think the PSA sounds very similar to the SVS. I don't feel like I am missing anything in performance but that could be due to now have dual subs compared to one. I did not get a second SVS because I wanted indentical subs and another PB12-plus would have been another $1400.00 compared to the less expensive dual XV15s. Selling the single SVS helped me finance the two XV15s.

I was concerned about how the XV15 would be for music because half of my HT time is spent listening to good music. I am really pleased so far that it sounds very nice with multi channel music.