Official Power Sound Audio Subwoofer Thread - Page 502 - AVS Forum | Home Theater Discussions And Reviews
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Old 11-18-2014, 10:49 AM
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What is up with this thread? When I click on the "go to first new post" icon I'm sent to the top of the last page?? Weird.....
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Old 11-18-2014, 11:43 AM
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Does anyone know the slope of the XV30's built in crossover?
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Old 11-18-2014, 12:01 PM
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Quote:
Originally Posted by Alan P View Post
What is up with this thread? When I click on the "go to first new post" icon I'm sent to the top of the last page?? Weird.....
Same here

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Old 11-18-2014, 12:19 PM
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Originally Posted by Brian Fineberg View Post
Same here
Pulse................

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Receiver - Denon 4311CI
Speakers - Klipsch RF-82 II's, RC-62 II, RB-61 II's
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Old 11-18-2014, 03:21 PM
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Huh, it's working right for me now.
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Old 11-18-2014, 04:38 PM
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So if I'm hunting down an SPL meter to check the sub, the Radio Shack 33-2055 seems to be the one most people use, right? I see several on Ebay, and I have someone local selling one used but he wants 45 bucks Tried to talk him down to no avail..

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Old 11-18-2014, 05:46 PM
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Originally Posted by Omni009 View Post
So if I'm hunting down an SPL meter to check the sub, the Radio Shack 33-2055 seems to be the one most people use, right? I see several on Ebay, and I have someone local selling one used but he wants 45 bucks Tried to talk him down to no avail..
Yeah that's the one you want, it's probably worth the $45 locally. I don't think Radio Shack makes the analog model anymore.
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Old 11-18-2014, 05:56 PM
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Quote:
Originally Posted by Omni009 View Post
So if I'm hunting down an SPL meter to check the sub, the Radio Shack 33-2055 seems to be the one most people use, right? I see several on Ebay, and I have someone local selling one used but he wants 45 bucks Tried to talk him down to no avail..
You will also likely have to buy a few adapters and cables, hunt down the RS's calibration file (have it somewhere...) and calibrate your sound card if you want to use REW.

Or, you could get a UMIK-1 or similar USB mic for a bit more than twice this price, which comes with its own individual calibration file, and which allows you to completely bypass your sound card, thus simplifying the measurement process. As a bonus, the mic can also be used as an absolute SPL meter since it's also calibrated in sensitivity.

Can you tell I don't use my RS much nowadays? That being said it's easier for just checking levels, although the readings are reportedly inaccurate at low frequencies.
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Old 11-18-2014, 07:01 PM
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10.0 -22.09
11.2 -19.25
12.5 -16.83
14.0 -14.69
16.0 -12.66
18.0 -10.61
20.0 -9.05
22.4 -7.64
25.0 -6.49
28.0 -5.33
31.5 -4.41
35.5 -3.61
40.0 -2.99
45.0 -2.41
50.0 -1.97
56.0 -1.64
63.0 -1.34
71.0 -1.14
80.0 -0.96
90.0 -0.86
100.0 -0.80
112.0 -0.82
125.0 -0.82
140.0 -0.88
160.0 -0.93
180.0 -0.95
200.0 -0.99
224.0 -0.94
250.0 -0.97
280.0 -1.00
315.0 -1.04
355.0 -1.04
400.0 -0.95
450.0 -0.92
500.0 -1.03
560.0 -0.95
630.0 -0.96
710.0 -0.79
800.0 -0.44
900.0 -0.17
1000.0 0.00



Here is the cal file for the RS meter
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Old 11-18-2014, 07:03 PM
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Cool, thanks!. So if I play test tones from REW at those frequencies, I apply those correction factors, right?

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Old 11-18-2014, 09:41 PM
 
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Hi, I have a troubling room, not dedicated its a multipurpose room with a desk and chest of drawers as well as Me Chair!!,
7.2 system in 1650 cuft. Which subs??
I'm pretty sure I want PSA, SO EITHER XV15se s or a pair of XS30se s

I have $$ for the 15 and would have to wait for the 30s, but I've had subs in this room before and it's hard to get slammed or high dbs.
Help please.
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Old 11-19-2014, 04:16 AM
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Why not get a xs30 now and add another later?
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Old 11-19-2014, 05:54 AM
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I like this idea from Brian. Start with one and if you find you need it add a second one after you save up a bit. That way you get one subwoofer in place and can enjoy it while you save up.
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Old 11-19-2014, 07:17 AM
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Okay guys it's time I make the time commitment to learning REW and measuring my room. To do this I will need to download REW, buy a umik and a HDMI cable long enough to run from the lap top to the AVR. Is this correct and if so is this all I need to start? Thanks.
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Old 11-19-2014, 07:19 AM
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Yeah, 1 XS30se will be plenty of sub in a room that size. With proper placement, you may not even need a second. The only reason you would need a second in a room that small is to smooth out any nulls....but you might get lucky and not even have a null at the MLP.

Start with 1 XS30.
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Old 11-19-2014, 07:20 AM
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Quote:
Originally Posted by Hopinater View Post
Okay guys it's time I make the time commitment to learning REW and measuring my room. To do this I will need to download REW, buy a umik and a HDMI cable long enough to run from the lap top to the AVR. Is this correct and if so is this all I need to start? Thanks.
That's it Hoppy! You've read the REW Guide, right?
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Old 11-19-2014, 07:25 AM
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Coming from those that all have 2-4 subs lol. Admit it, something about one subs is never "plenty". It's like going to work with one sock on.


I think you have a better chance of hitting the lottery then placing one sub in a room and end up no peaks or nulls.


I do agree with the advice above...start with a XS30 with plans on adding a second.
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Old 11-19-2014, 07:59 AM
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Hop,

REW isnt as tough to learn as some make it out to ...especially if your using a windows laptop...I use a macbook with no HDMI so learning was a nightmare...but its cake now.

let me know if you run into any issues Ill help ya out. best 125$ you'll ever spend
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Old 11-19-2014, 08:37 AM
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Quote:
Originally Posted by Alan P View Post
That's it Hoppy! You've read the REW Guide, right?
Quote:
Originally Posted by Brian Fineberg View Post
Hop,

REW isnt as tough to learn as some make it out to ...especially if your using a windows laptop...I use a macbook with no HDMI so learning was a nightmare...but its cake now.

let me know if you run into any issues Ill help ya out. best 125$ you'll ever spend
Thanks so much guys.

Alan, I haven't read through the thread yet but I know I'll be spending some time there real soon.

Brian, I use a macbook as well and that's actually why I have been putting this off for over a year now. But luckily my dad just upgraded his windows laptop and is giving me his old one (which is less than a year old) so now I'm ready. Thanks for the offer to help me out, I have a felling I may very well be taking you up on it.
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Old 11-19-2014, 08:39 AM
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while it takes a few more steps to rememeber, a macbook can be used...but its just not as straightforward

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Old 11-19-2014, 08:42 AM
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Does anyone know the slope of the XV30's built in crossover?
Its 24dB/octave. You can see the effect of changing the crossover setting here.


http://www.data-bass.com/data?page=s...d=106&mset=118 (click on extended tab)

That is the same for all Power-X amplifiers.

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Old 11-19-2014, 08:45 AM
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One more quick question. What's the best place to buy a umik? It looks like the miniDSP website has it for $75 while Cross Spectrum has it for $95 is there something about this that makes it worth the extra $20. Am I missing something here?
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Old 11-19-2014, 08:52 AM
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Quote:
Originally Posted by PowerUser View Post
Hi, I have a troubling room, not dedicated its a multipurpose room with a desk and chest of drawers as well as Me Chair!!,
7.2 system in 1650 cuft. Which subs??
I'm pretty sure I want PSA, SO EITHER XV15se s or a pair of XS30se s

I have $$ for the 15 and would have to wait for the 30s, but I've had subs in this room before and it's hard to get slammed or high dbs.
Help please.
Dual XV15se will offer strong bass down to the 15-18z range with clean output capabilities around 118-121dB from 20hz and up. The single XS30se will have similar mid and upper bass capabilities and deeper extension....7hz to 11hz. But in the 16-35hz range the dual XV15se will have about twice the output capabilities. If it was going to be quite a while before adding the second XS30se, I'd lean toward the dual XV15se here...particularly if you enjoy action oriented DVDs at very loud volume levels on occasion.

If you were more concerned with extreme output level with music/concert DVDs rather than film....the single XS30se may be the better value as it is $450 less expensive and offers VERY high output capabilities with most music source material.

Tom V.
Power Sound Audio
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Old 11-19-2014, 09:15 AM
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Quote:
Originally Posted by Hopinater View Post
Okay guys it's time I make the time commitment to learning REW and measuring my room. To do this I will need to download REW, buy a umik and a HDMI cable long enough to run from the lap top to the AVR. Is this correct and if so is this all I need to start? Thanks.

You'll need a hand held SPL meter too.
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Old 11-19-2014, 09:18 AM
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One more quick question. What's the best place to buy a umik? It looks like the miniDSP website has it for $75 while Cross Spectrum has it for $95 is there something about this that makes it worth the extra $20. Am I missing something here?
The Cross Spectrum mic's are calibrated down to 5hz, and it has corrected calibration files for 90degree, 45degree and 0degree measurements. The miniDSP mic is only calibrated for 90degree measurements. I've had both and the Cross Spectrum one does seem to take slightly more accrute measurements IMO.
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Old 11-19-2014, 09:22 AM
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You'll need a hand held SPL meter too.
Not if he gets a cal file with a sensitivity factor.

That being said, I think an SPL meter is still an essential tool for any HT geek.
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Old 11-19-2014, 09:26 AM
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The Cross Spectrum mic's are calibrated down to 5hz, and it has corrected calibration files for 90degree, 45degree and 0degree measurements. The miniDSP mic is only calibrated for 90degree measurements. I've had both and the Cross Spectrum one does seem to take slightly more accrute measurements IMO.
I already have the SPL meter so I'm good there. It sounds like either one would be fine if the difference is just slight. Am I correct in that assumption?
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Old 11-19-2014, 09:45 AM
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ehhh...i would spend the extra 20$ imho

JVC RS400 4K PJ | Denon x7200WA 7.2.4 ATMOS/DTS-X | Emotiva XPA-5 gen2 |Emotiva XPA-200 gen2 | DIY 1099's LCR| (4) VOLT 6 sidesurrounds/Back Surrounds | (4) VOLT 6 ATMOS | 1 - PSA XS30 | (2) DIY SI-HT18 sealed (2) DIY SI18 DS4 sealed| (2) inuke6000dp | Samsung K8500 4k UHD BDP | 16x11x7.5 sealed HT SadieMax theater...my first DIY build and ongoing projects
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Old 11-19-2014, 09:51 AM
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One more quick question. What's the best place to buy a umik? It looks like the miniDSP website has it for $75 while Cross Spectrum has it for $95 is there something about this that makes it worth the extra $20. Am I missing something here?
Shipping. Minidsp had my shipping to CA at 20 extra. So 95 total.

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Old 11-19-2014, 09:55 AM
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Shipping. Minidsp had my shipping to CA at 20 extra. So 95 total.
PSA has it for $90 which includes shipping.
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