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My new PSA subs and my graphs - Page 20

post #571 of 600
Thread Starter 
Here is one of the dual opposed enclosures I just finished.





post #572 of 600
Te XV-30 is not a full 6 dBs ahead of the XV-15. I look at the max Long term output of each sub. It corresponds more with the winisd sims.
post #573 of 600
Looking great!
post #574 of 600
Quote:
Originally Posted by MKtheater View Post

Te XV-30 is not a full 6 dBs ahead of the XV-15. I look at the max Long term output of each sub. It corresponds more with the winisd sims.

I used 3.8db more output (per basshead) than the XV-15.

post #575 of 600
Quote:
Originally Posted by MKtheater View Post

Looking great!

Agreed! Great work!

post #576 of 600
Thread Starter 
Thanks guys...!
post #577 of 600
Very nice pd, looking really good! cool.gif
post #578 of 600
Sorry to intrude on this post but never having owned a separate powered subwoofer before I have absolutely idea how to go about picking one. Even the higher new Best Buys stores here in Houston dont have sub set up in a way that you can actually compare them side by side and even if you do so what? They wont sound the same in your own particular space I am assuming.

I have a large 10' wide console including a connecting bridge with a shelf above a 65" Panasonic Plasma ZT TV for a center channel . I have a Pioneer Elite VSX 70 7.2 surround sound A/V with Martin Logan Motion 40s floor speakers (2) and a Martin Logan 30 center speaker tilted downward (using door stops underneath) so that the center channel is pointed down toward the center of the couch about 13' away. Not sure if that really has any impact but maybe just a little.

Ive waited to buy a subwoofer as the last component. I ran SVS Merlin subwoofer matcher based on inputting my Martin Logan 40s which picked PB12 Plus (Ported) , SW13-Ultra (sealed) and PC12-Plus(Cylinder) subwoofers. Im a newbie to this and had never heard of these Online Direct sellers nor the Power Sound Audio XV15s or the HSU VTF-3 MK4 all three (SVS, HSU, and Power Sound Audio) and got these name after extensively researching the AVS site looking for advice.

The only thing is somewhat get is that the subwoofers are mainly for HT movie use for frequensies below 40hz (I think that is the lower range quoted by Martin Logan for the Motion 40s floors. Several AVS members have said pipe organ music listeners benefits from the subs but I could care less about that unless I want to listen to Tubular Bells. This is mainly for movies although I hooked up an old turntable with a pre-amp and have been enjoying listening to some old vinyl although I haven't yet used that calibration thing on the Pioneer Elite receiver (was waiting until I got a subwoofer) where you set a small mike up where you will primarily be watching/listening to TV/music and it does some kind of calibration

I hear terms like headroom and cross frequencies and dead spots etc and shake my head as Im clueless. Im somewhat limited to where I can put a subwoofer in that the wall with the 10' TV console etc is on a 15'4" wall in a room 18 long with 9 foot ceilings which opens up to another 12x12 room (Small dining room) behind the couch. The floors are wood laminate. Anyway there is only 33' to the right wall and I already have one of the Martin Logan speaker there which would leave only 18". Along the right wall there are two 48'x72" windows separated by a seven foot wide foot brick fireplace with a 7" tall seating ledge that comes out 18" from the wall . So I am thinking I could put One sub along the left edge of the brick seating ledge as there is about 18" of sheetrock/Brick form part of fireplace directly behind the spot the Sub would be placed. There is a wall power outlet there but it would be very close (8") to the window that covered with wood laminate blinds. The left floor speaker would be approximately 4' from the Subwoofer (which is out in front and off to the side) as is around 6 feet from the right corner edge of the TV at around a 45 degree angle.

Im a bit concerned about putting a subwoofer speaker that close to a window and if that effects the sound or would cause faster deterioration of the subwoofer. We rarely if ever use the fireplace as we lvie in Houston.

On another note there is a long side of a L shaped couch on the left wall of the room that actually partially blocks the lower 1/3 of the left Martin Logan speaker so there is no room there to put a first sub much less an second one . The cabinet that holds the tvs and component has glass front doors and there is no place to place a sub inside a cabinet and I don't want to put a square, rectangular or cylinder sub in front of the cabinet, especially since the cylinders are almost 40" tall. Also concerned about wifey factor who complains from upstairs about loud TV even with no sub.

I dont really want a subwoofer so powerful that it knocks quarters over in the next room, shakes pictures off the walls, or makes your head hurt but I do want one that fits my room and is complementary to the Martin Logan 40s and 30 and Pioneer Elite receiver I just bought. I thought earlier my viewing/listening habits would be 90/10 in favor of Blue Ray movies and TV as compared to music but I think it will end up more like 70/30 once everything is in place.

So how does one go about picking a sub and testing it in such way you can actually differentiate a $400 sub from a $2000 in a room that is not a dedicated home theatre room . I see that some of the Online Direct seller like SVS give you 45 days to try them out which you can also do with Best Buy as an Elite member but they will also allow you to trade up by paying differential in price and shipping both ways and trading up to a more expensive sub with a bigger subwoofer. That seems like a very good deal but still I have not been able to compare apples to apples in subwoofers by actually hearing them side by side. People are different and have different tastes

So any advice greatly appreciated. I am making a concerted effort to learn but alot of this is over my head and Im not sure what you should be listening for when comparing subwoofers and setting them in the optimum place in your home
post #579 of 600
PDXRealtor--casters? Is there any risk of your tubes deciding to relocate during use? I'm picturing lassos and hitching posts, every black stallion a clone, every one named Satan.
post #580 of 600
Are they locking casters?
post #581 of 600

Now there's a clever way to eliminate room nodes: rolling subwoofers!

:D

post #582 of 600
I think the casters aren't a bad idea, especially if ur sliding them around a lot doing trial and error. As long as they lock that is.
post #583 of 600
Quote:
Originally Posted by SaviorMachine View Post

PDXRealtor--casters? Is there any risk of your tubes deciding to relocate during use? I'm picturing lassos and hitching posts, every black stallion a clone, every one named Satan.

Love the reference!
post #584 of 600
Dual function, lift the sub/driver up off of the floor and then ease of moving. win-win
post #585 of 600
Thread Starter 
They have two locking wheels, those pivot. The other two dont pivot and dont lock. They are installed in a configuration where two locking wheels keeps them stationary. wink.gif
post #586 of 600
Quote:
They have two locking wheels

Are they air compression or hydraulic locking wheels? It can make a difference..
post #587 of 600
Thread Starter 
Huh? What is a hydraulic locking wheel? AFAIK , they are compression.
post #588 of 600
Quote:
Originally Posted by pdxrealtor View Post

Huh? What is a hydraulic locking wheel? AFAIK , they are compression.

Well disk breaks work pretty good also biggrin.gif sorry, I thought you would get it from the get-go wink.gif
Edited by steve nn - 10/13/13 at 1:08pm
post #589 of 600
Thread Starter 
Quote:
Originally Posted by steve nn View Post

Well disk breaks work pretty good also biggrin.gif sorry, I thought you would get it from the get-go wink.gif

I had just woke up. Lol. I even looked it up on google and got nothing but stuff about car brakes. rolleyes.gif

Im slow today.....
post #590 of 600
Quote:
Originally Posted by pdxrealtor View Post

I had just woke up. Lol. I even looked it up on google and got nothing but stuff about car brakes. rolleyes.gif

Im slow today.....

Hey I could have just as easily done the same thing. I did contemplate on putting a smiley after the question though. Ok you owe me a zing as bass would say then. That’s what we get when we mess with the squatch! biggrin.gif
post #591 of 600
Quote:
Originally Posted by pdxrealtor View Post

Huh? What is a hydraulic locking wheel? AFAIK , they are compression.

Zing.....tongue.gif
post #592 of 600
Quote:
Originally Posted by LastButNotLeast View Post

Now there's a clever way to eliminate room nodes: rolling subwoofers!
biggrin.gif

It'll sure make it easy to do some sub crawling.
post #593 of 600

Actually, I had visions of the subs rolling from areas of high pressure (booming) to areas of low pressure (nulls) all by themselves.

Fully automatic room EQ. Brilliant.

;)

post #594 of 600
Quote:
Originally Posted by pdxrealtor View Post

They have two locking wheels, those pivot. The other two dont pivot and dont lock. They are installed in a configuration where two locking wheels keeps them stationary. wink.gif
...slick...
post #595 of 600
Quote:
Originally Posted by LastButNotLeast View Post

Actually, I had visions of the subs rolling from areas of high pressure (booming) to areas of low pressure (nulls) all by themselves.
Fully automatic room EQ. Brilliant.
wink.gif
Hahaha, EQ in 4D, some next-level 'ish
post #596 of 600
Thread Starter 
Getting ready to start posting REW graphs and dialing in the new setup. Looking for input on 'starter' settings for the mini-dsp. ANyone with DIY knowledge of setting up the mini-dsp for a sealed setup is asked to please ad input here-


http://www.avsforum.com/t/1489523/si-18s-6-in-sono-tubes-build-is-done-need-help-with-tuning/180#post_23862274
post #597 of 600
Looking for 2 Subs for my 20 x 17 media room. Talked to Tom today with PSA. He suggested 2 VX15's. Of course the XS 30's would likely be better, but are they $700 better for the pair?????

Would like your thoughts since you own the XS30's. Would 2 PSA 15's be OK, or would you get the XS 30's?

Here's room:









post #598 of 600
the XV15's will have a slight advantage around the tuning point of 18hz, the XS30's will extend deedper and offer a sizeable performance gain above 30hz. If you spend most of your time listening to music the XS30's would reveal thier advantage, but if you are 50/50 or mainly HT then I would go XV15's and save the coin. Actually I would take that extra700.00 and apply towards a 3rd XV15. that will close the gap in performance up in the 40-80hz range and offer a nice bump in ouput in the 15-30hz range over the XS30's. I run 3 XV15's in a 20x15 room and they are pretty impressive. I watched the grand master at -15 lastnight and I could literally feel the punches and kicks during the fight scenes hitting me in the chest. there were some ULF scenes where the room just shook like a earth quake. hope this helps smile.gif
post #599 of 600

I agree with Basshead, three XV15's would be better for home theater than two XS30's in most respects.  But if you stick with two subs, there is no downside to the XS30's, and substantial benefit in overall output and extension.  Also remember, not all movie output is at 20 Hz, there is a lot above 30 Hz as well, and the XS30 output above 30 is astounding.

post #600 of 600
Thread Starter 
Quote:
Originally Posted by bear123 View Post

I agree with Basshead, three XV15's would be better for home theater than two XS30's in most respects.  But if you stick with two subs, there is no downside to the XS30's, and substantial benefit in overall output and extension.  Also remember, not all movie output is at 20 Hz, there is a lot above 30 Hz as well, and the XS30 output above 30 is astounding.

Regardless what choice you make if room allows buy the singles until you reach four minimum. Biggest lesson I've learned over three sub systems.
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