Official Power Sound Audio Subwoofer Thread - Page 58 - AVS Forum | Home Theater Discussions And Reviews
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Old 03-04-2013, 04:05 PM
 
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Originally Posted by bowmah View Post

If you are lucky, kaf = waf = your own af! Lol

if your really lucky kaf > waf < my af

cheers
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Old 03-04-2013, 09:41 PM
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if your really lucky kaf > waf < my af

cheers

We will just have agree to disagree. Your formula results in 2 of variables outweighing 1.

Now imagine how much your own af equals. Then imagine kaf and waf being equal to that. That would literally mean one day you bring home a kick ass sub. Then your other half says "hey, let's get another one of those". I would prefer this smile.gif

Who agrees? Lol
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Old 03-06-2013, 04:59 PM
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Just ordered another XV-15 last night to go behind the seating area. I already have two XV-15's up front.
Pretty excited to get it, as there is a null where the seating area is (seats are in the middle of the room).
All in an 1750 cu ft room!

Vardo
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Old 03-06-2013, 05:28 PM
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Vardo, not that 3 x XV15 wouldn't be awesome but you tried moving one of the two front subs to the rear before adding a 3rd?
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Old 03-06-2013, 05:50 PM
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I moved them all over the place. Ended up with one is in the right front corner, one along the wall, 5 feet from the
left front corner. They sound awesome in those positions, but getting rid of nulls is tough. I set up
a fairly large sub behind the nearfield listening position with a positive gain, but that sub was sealed,
and had nowhere near the power and characteristics of an XV-15. 3 XV-15's in 1750 cu ft room will
be awesome.

Last night the wife was out, and I played a movie at ref level.....unbelievable! With a 3rd behind the
listening home theater seats (I only have two home theater recliners, the room is narrow) the sound
will really improve. The room is 20ft long, but the recliners are at 10' back, because of the 70" TV
(that's the best viewing distance for a 70").

These subs are really great, and really a bargain. I've had large true subs before HSU VTF3 MK3 with turbo,
VTF2 Mk3, Epik Legends (one for sale now in classified), 2 VTF/1, and built 2 Dayton Titanic 10" subs kits,
so it's not like the XV-15's are my first subs. For the price, you will not find a better bargain at this sound level
and quality.

Vardo
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Old 03-06-2013, 07:05 PM
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Congrats Vardo, that should be a fun setup to say the least! I have a question...is it possible to have your seating position sitting in a null when your sub is placed nearfield? I ask because I have nearfield placement and happened to have some bass heavy music on. I happened to walk by one of my corners where the entry door is that intersects with a wall to a stairwell. The bass was incredible strong and noticeable more chest pumping than when sitting right next to the sub? Feeling like I cannot win on placement ;(
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Old 03-06-2013, 07:40 PM
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No null if a sub is placed nearfield. It can be placed 3-4 ft from your seating area, and then there can be a null. Usually a null can be
reduced by acoustic treatments, but mine is bad enough, treatments will not help. And treatments are usually only good down
to 60Hz, unless the treatment material is a foot or more thick. I do have treatments in my room, and it did help. My subs
didn't play louder or deeper, just smoother. I have 6 treatments in my room, two at ea absorption of the first reflection point of the
left and right mains, and 4 bass traps, which are 4' x 2' by 4" thick. Two, each placed in the left and right front corners
up front, and 2 ceiling to wall in the front also.

If a sub is placed close enough to where you're listening, it will greatly reduce a null. It just has to have the sound tweaked
so you can not localize it.

The best spot for your sub is where the entry door that intersects with the wall to the stairwell, but obviously you cannot put it there.
Usually if you place a sub behind your seating area (and I don't mean 3 or 4 ft, it will greatly help). Or near the end of your seating
area, assuming you don't have a row of 10 seats, and you sit in the middle. In that case i'd put the sub right behind the listening area,
between the middle of the seats. Just my IMO, and I've already experimented with another sub per my post. It made a pretty nice
difference, one that I could not ignore. Your should Email Tom V to get his take. He is a big on acoustic treatments (especially
before any eq programs are run).

So a person can reason, why do the sub crawl, or drag the sub(s) all over the place? Just place the sub nearfield and forget it.
Placing the sub nearfield IS NOT the best place for your sub. It can play deeper and louder in the "ideal" positions. But placing
a sub nearfield greatly reduces stubborn nulls.

vardo
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Old 03-06-2013, 07:46 PM
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^^^
Thanks for the informative reply Vardo!
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Old 03-07-2013, 10:33 PM
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What is a good mic to use with REW? I recall someone in here using one with their PSAs that was around $100-130, thanks!
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Old 03-07-2013, 11:39 PM
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Quote:
Originally Posted by pretsam View Post

What is a good mic to use with REW? I recall someone in here using one with their PSAs that was around $100-130, thanks!

Dayton UMM6 or minidsp umik-1
The dayton has calibrations at multiple angles including the 90 degrees we tend to use (even though that's not very important for the bass freqs) but the umik-1 has a little more support built into REW for now such as using the sensitivity value from the cal files. John the author of REW is working on making the dayton as supported as the minidsp. Even without the extra support the dayton is easy to get going.

hope this helps
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Old 03-08-2013, 08:21 AM
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Hi all, quick update.

We have two large shipments inbound----amps and drivers. The amps are due to arrive here mid week(around the 12th -13th). They are on US soil now.(only a few hundred miles away actually)

The drivers are scheduled to arrive a day or three later.

Once everything arrives we will be able to fill all back orders fairly quickly. I'd say within 2 business days. (yes, there will be a couple of long days here..smile.gif

I know this is 5-7(?) days longer than my original estimates and I do apologize for the any inconvenience the additional delay causes.

Tom V.
Power Sound Audio

“Price is the last refuge for the business without the imagination or ability to offer more" - Unknown.
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Old 03-08-2013, 08:31 AM
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Quote:
Originally Posted by Tom Vodhanel View Post

Hi all, quick update.

We have two large shipments inbound----amps and drivers. The amps are due to arrive here mid week(around the 12th -13th). They are on US soil now.(only a few hundred miles away actually)

The drivers are scheduled to arrive a day or three later.

Once everything arrives we will be able to fill all back orders fairly quickly. I'd say within 2 business days. (yes, there will be a couple of long days here..smile.gif

I know this is 5-7(?) days longer than my original estimates and I do apologize for the any inconvenience the additional delay causes.

Tom V.
Power Sound Audio

Thanks, Tom! Any idea when you'll have enough supply to start shipping new orders? I'm trying to talk a buddy into buying PSA, specifically an XS30. tongue.gif
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Old 03-08-2013, 08:58 AM
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Originally Posted by lewdogg View Post

Thanks, Tom! Any idea when you'll have enough supply to start shipping new orders? I'm trying to talk a buddy into buying PSA, specifically an XS30. tongue.gif

Barring some unforeseen delay we should have all the back orders outbound by Monday/Tuesday (18th, 19th). And if things align perfectly, it could be as soon as 14th or 15th. I'd say any new order will ship out in the 20th-21st window. After that we should be back to "new order ships within 1 business day" for a long time. There is a *lot* on inventory inbound..smile.gif


Tom V.
Power Sound Audio

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Old 03-08-2013, 07:43 PM
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Quote:
Originally Posted by Tom Vodhanel View Post

Hi all, quick update.

We have two large shipments inbound----amps and drivers. The amps are due to arrive here mid week(around the 12th -13th). They are on US soil now.(only a few hundred miles away actually)

The drivers are scheduled to arrive a day or three later.

Once everything arrives we will be able to fill all back orders fairly quickly. I'd say within 2 business days. (yes, there will be a couple of long days here..smile.gif

I know this is 5-7(?) days longer than my original estimates and I do apologize for the any inconvenience the additional delay causes.

Tom V.
Power Sound Audio

Im waiting patiently for mine, but because of your transparency and proper business ethic I am completely satisfied to sit and twiddle my thumbs, Can't say enough about how nice it was to talk to you over the phone and get instant feedback on what was proper for MY setup.
Thanks! I wish you the best in an competitive industry.
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Old 03-10-2013, 06:46 PM
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Originally Posted by getsideways87 View Post

Im waiting patiently for mine, but because of your transparency and proper business ethic I am completely satisfied to sit and twiddle my thumbs, Can't say enough about how nice it was to talk to you over the phone and get instant feedback on what was proper for MY setup.
Thanks! I wish you the best in an competitive industry.

Very welcome!

I believe I have emailed updates to just about everyone on the back order list but if I missed anyone please don't hesitate to email or call. My above estimates still look accurate. I'll be sure to post another update in about 48 hours too.

Tom V.
Power Sound Audio

“Price is the last refuge for the business without the imagination or ability to offer more" - Unknown.
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Old 03-11-2013, 10:07 AM
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Quote:
Originally Posted by dstew100 View Post

Dayton UMM6 or minidsp umik-1
The dayton has calibrations at multiple angles including the 90 degrees we tend to use (even though that's not very important for the bass freqs) but the umik-1 has a little more support built into REW for now such as using the sensitivity value from the cal files. John the author of REW is working on making the dayton as supported as the minidsp. Even without the extra support the dayton is easy to get going.

hope this helps

Thanks dstew. That's what I was looking for that minidsp umik-1.
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Old 03-11-2013, 10:27 AM
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Quote:
Originally Posted by pretsam View Post

Thanks dstew. That's what I was looking for that minidsp umik-1.

Quote:
Originally Posted by dstew100 View Post

Dayton UMM6 or minidsp umik-1
The dayton has calibrations at multiple angles including the 90 degrees we tend to use (even though that's not very important for the bass freqs) but the umik-1 has a little more support built into REW for now such as using the sensitivity value from the cal files. John the author of REW is working on making the dayton as supported as the minidsp. Even without the extra support the dayton is easy to get going.

hope this helps

For what it's worth - I initially ordered the UMIK-1 because it is recognized in the REW software and needs no SPL calibration. However after reading up on the unit in the minii dsp website I discovered that there were errors in the individual calibration files associated with each UMIK-1, as well as the fact that the file is for 0 degree grazing point and that the file has a minimum sensitivity of 20hz. I subsequently exchanged the unit for UMM6 that comes with an accurate calibration file good to a minimum of 15hz as well as calibration files for 0, 45 & 90 degrees. The SPL calibration process in REW is quite simple - even I can do it!

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Old 03-11-2013, 10:56 AM
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Originally Posted by ggsantafe View Post


For what it's worth - I initially ordered the UMIK-1 because it is recognized in the REW software and needs no SPL calibration. However after reading up on the unit in the minii dsp website I discovered that there were errors in the individual calibration files associated with each UMIK-1, as well as the fact that the file is for 0 degree grazing point and that the file has a minimum sensitivity of 20hz. I subsequently exchanged the unit for UMM6 that comes with an accurate calibration file good to a minimum of 15hz as well as calibration files for 0, 45 & 90 degrees. The SPL calibration process in REW is quite simple - even I can do it!

I have used an ECM8000 in the past. I have 2 XS30's on order and decided to use this time as an excuse to move to a USB mic for simplicity. I found the same as you mentioned - was sold on the UMIK-1, but decided to purchase a UMM-6 from Cross Spectrum due to recent issues. It also appears that the UMIK-1 has been backordered a bit lately (has been getting to people's doors in 5 days from Hong Kong). I ordered mine over the weekend and it shipped out this morning from Massachusetts. I'll have it before my subs get here.

I'm looking forward to seeing the frequency response on the XS30's. It sounds like others will be doing the same.

Please share your graphs in this thread
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Old 03-11-2013, 11:06 AM
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I have used an ECM8000 in the past. I have 2 XS30's on order and decided to use this time as an excuse to move to a USB mic for simplicity. I found the same as you mentioned - was sold on the UMIK-1, but decided to purchase a UMM-6 from Cross Spectrum due to recent issues. It also appears that the UMIK-1 has been backordered a bit lately (has been getting to people's doors in 5 days from Hong Kong). I ordered mine over the weekend and it shipped out this morning from Massachusetts. I'll have it before my subs get here.

I'm looking forward to seeing the frequency response on the XS30's. It sounds like others will be doing the same.

Please share your graphs in this thread

Yep - can't wait for my XV 15 to arrive - will share measurements for sure.

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Old 03-11-2013, 03:26 PM
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Quote:
Originally Posted by ndskurfer View Post

I have used an ECM8000 in the past. I have 2 XS30's on order and decided to use this time as an excuse to move to a USB mic for simplicity. I found the same as you mentioned - was sold on the UMIK-1, but decided to purchase a UMM-6 from Cross Spectrum due to recent issues. It also appears that the UMIK-1 has been backordered a bit lately (has been getting to people's doors in 5 days from Hong Kong). I ordered mine over the weekend and it shipped out this morning from Massachusetts. I'll have it before my subs get here.

I'm looking forward to seeing the frequency response on the XS30's. It sounds like others will be doing the same.

Please share your graphs in this thread

Thanks for the heads up Kurfer. Are you guys using a laptop or separate desktop computer?
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Old 03-11-2013, 05:04 PM
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Originally Posted by pretsam View Post

Thanks for the heads up Kurfer. Are you guys using a laptop or separate desktop computer?

I'm using a Dell Netbook - basically you need a Windows based laptop/netbook with an HDMI connection to take advantahe of the USB based UMM-6 or UMIK1. Check out the Simplified REW thread: http://www.avsforum.com/t/1449924/simplified-rew-setup-and-use-usb-mic-hdmi-connection-including-measurement-techniques-and-how-to-interpret-graphs for lots of valuable information on set up & implementation

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Old 03-12-2013, 09:55 AM
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^^^

You don't need a laptop or netbook, you can use your desktop if need be.
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Old 03-12-2013, 10:22 AM
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Yes you can use a desktop, but if its not in the same room you may find yourself doing a lot of back & forth and
you may need an extension cable for your USB microphone.

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Old 03-12-2013, 10:45 AM
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^^^

Agreed, just wanted him to know that you don't absolutely need to go out and buy a laptop. smile.gif
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Old 03-12-2013, 08:03 PM
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Placed my order for a XV15 over the weekend. Looking forward to hearing the back orders are caught up so I am that much closer.
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Old 03-12-2013, 09:29 PM
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+1 on UMM-6 over the umik-1
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Old 03-13-2013, 04:45 AM
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+1 on UMM-6 over the umik-1

Can u share some reasons why you prefer the UMM-6 over UMIK-1?
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Old 03-13-2013, 08:18 AM
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Quote:
Originally Posted by dstew100 View Post

+1 on UMM-6 over the umik-1

Can u share some reasons why you prefer the UMM-6 over UMIK-1?

The reasons are a few posts back. Calibrations at different angles, especially 90 degrees, so you can point the mic at the ceiling and measure multiple speakers. The UMIK-1 cal is at 0 degrees so it should be pointed at the speaker. Although REW doesn't support the dayton's sensitivity figure so you have to give it an SPL reference (either with an SPL meter or test tone at a known volume) it will support that soon as REW author John is building that. I agree with ggsantafe that the SPL reference setup is very very easy, it's simply not enough to factor into my decision anyway. Finally I believe there was some evidence posted recently in the REW thread that the mik-1 is not really individually calibrated but I could be wrong on that. There was a post in the REW thread not too long ago comparing UMM6 results and UMIK-1 results and it didn't look goof for the UMIK-1 if I understood what I was reading in the graphs correctly.
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Old 03-13-2013, 09:10 PM
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Just posted on the Rythmik forum, and I have my choice of sub narrowed down to a XS30 or a F15.
I have a sealed 1600 cubic feet room, with the only option of putting it in a corner. I listen to a mix of movies and music.
Any thoughts on the strengths and benefits of either sub?
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Old 03-14-2013, 08:34 AM
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Okay Tom, Theater room is done this weekend hope your shipments showed up on time smile.gif
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