Subwoofer Tests Round 4, 5-6th of May 2007, Test Summary - Home Theater Forum and Systems - HomeTheaterShack.com

 
Thread Tools
post #1 of 6 Old 07-30-07, 12:01 PM Thread Starter
Elite Shackster
 
Ilkka's Avatar
Ilkka
 
Join Date: Jun 2006
Location: Finland
Posts: 1,468
Subwoofer Tests Round 4, 5-6th of May 2007, Test Summary



Measuring conditions:

Air temperature: 10-15 C
Atmospheric pressure: ~1020 hPa
Wind speed: 1-3 m/s
Weather: Sunny, partly cloudy

Once again it’s that time of the year. No, not super bowl or spring break but time for the Finnish subwoofer tests instead! Since the last measurement session, many interesting commercial subwoofers were announced, not to mention even more interesting DIY subwoofers. So naturally a new measurement session must be held in order to find out how these new subs fare against the older rivals and also between each other. The first weekend of May looked promising when it comes to weather, so there was it. Again we had so many pre-registered participants that we had to arrange a two-day event. It’s pretty much impossible to measure more than 12-14 units in a day unless one wants to be there all day round.

This time we took total of 23 measurement sets (some units multiple times due variable tuning), quite commendable amount, even if I say so myself. The weather was quite nice, though much chillier than last spring. We had a small shower at the very end of the second day that eventually made us to abort the session. Luckily there was only two subwoofers to be measured, so we measured them on the next weekend. Since the ambient temperature was on the chilly side, maximum output measured with the long sine sweep method on the control/reference unit (BK Monolith-DF) was little bit higher (1-2 dB depending of the frequency) than last spring. To make that difference even smaller in the future sessions, I adopted a new method for measuring maximum output – the CEA 2010 standard. You can read more about it on the Subwoofer Tests Explained thread. Also notice that the maximum output plot shows the maximum output before severe compression, meaning it may not be the absolute maximum output (especially in upper bass range). The CEA 2010 test shows better the absolute maximum SPL in upper bass range. So remember to check these results: http://www.hometheatershack.com/foru...mpilation.html



SVS SB12-Plus was used as a reference subwoofer to ensure that the frequency response of the system nor the absolute SPL didn’t change between test days. Here is the relative difference between the frequency responses measured each day. +/- 0.2 dB can be considered identical when noticing normal variations in background noise etc.



I also measured the difference in THD between each day. Here’s a small gif animation which shows that the difference is very small, almost nonexistent.



Again many requests and inquiries were sent to both subwoofer manufacturers and Finnish importers, but sadly not many were answered. I guess most of them are thinking that they would lose potential customers if the true performance of their subwoofers was revealed. Therefore I must congratulate and thank Kymen Laatulaite and Marek Sound for bringing their subwoofers in. Also thank you to HSU Research and L-Sound/SVS for assistance in getting their subwoofers here. Naturally I’m also grateful to all the private persons, especially DIY guys, who were kind enough to bring their subwoofers. The measured data was sent to all the big players prior to publication so that they could check it against their own data.

Thank you to Maukka, pictures were again superb! Also thank you to Goodguy, geecb and jhautajoki for helping me out with the arrangements regarding the test. The next measurement session is already being planned. Subwoofer manufacturers and DIY’ers – start your engines!

Links to subwoofers tested on this round:
B&W PV1
BK Monolith-DF
BK XLS200-DF MK2
Chorus Vertigo XLS 07
DIY Adire Audio Tumult 15" MK1 sealed 100L
DIY Peerless XLS 12" ported 85L
DIY Peerless XXLS 10" sealed 50L
DIY Rythmik Audio Direct Servo 12" sealed 56L
DIY TC Sounds 2xTC-2000 15" sealed 140L
DIY TC Sounds TC-2000 15" ported 270L
DIY TC Sounds TC-2000 15" sealed 90L
HSU MBM-12
HSU VTF-3 MK3 (maximum output)
HSU VTF-3 MK3 (maximum extension)
HSU VTF-3 MK3 with Turbocharger
Monitor Audio BRW10
SVS 20-39PC+ 20 Hz tune (Plus 12.3)
SVS 20-39PC+ 16 Hz tune (Plus 12.3)
SVS 20-39PC+ 12 Hz tune (Plus 12.3)
SVS PB12-NSD
SVS SB12-Plus
XTZ 99 W12 (maximum output)
XTZ 99 W12 (maximum extension)

No material may be reproduced in part or in altered form without permission. Copyright © 2007 Ilkka Rissanen and Mauri Eronen (pictures)
Ilkka is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 07-30-07, 05:31 PM Thread Starter
Elite Shackster
 
Ilkka's Avatar
Ilkka
 
Join Date: Jun 2006
Location: Finland
Posts: 1,468
Re: DVDPlaza Subwoofer Tests Round 4, 5-6th of May 2007, Test Summary

Some quick comments:

B&W PV1
Good frequency response for smaller rooms, but quite low max SPL, especially at low end. Really high distortion at lower frequencies. Upper end is extremely clean though. Low group delay and fast decay. Very small and beautiful enclosure.

BK Monolith-DF
Good extension and FR for larger rooms with less low end room gain. Good overall maximum SPL capability. Low power compression. Low overall distortion. Low group delay and fast decay, especially for a ported subwoofer. No high pass below the tuning, meaning the highest sweep made the woofer to bottom out. Not a problem with program material though. Good performance/price ratio.

BK XLS200-DF
Good frequency response for really small rooms with lots of low end room gain. Doesn’t go very with higher crossover setting and in larger rooms. Low power compression. Extremely low group delay and fast decay. Very small and sturdy enclosure.

Chorus Vertigo XLS 07
A Finnish subwoofer. Very flat frequency response above 30 Hz. Doesn’t go very low though. Very low distortion. Max SPL is limited to ~100 dB.

DIY Adire Audio Tumult 15" MK1 sealed 100L
Frequency response shows that the woofer has a very high inductance. No shorting ring either. Good max SPL capability (especially CEA 2010 test), even though the amp clipped during the highest sweep. Low compression up to 110 dB level. Low deep bass distortion, but quite high upper end distortion already at lower levels (could be high flux modulation distortion). Distortion has quite much high order components, which makes it pretty audible. Low group delay and fast decay. Very heavy and sturdy enclosure. It will be very interesting to see how the CSS SDX15 will do.

DIY Peerless XLS 12" ported 85L
Good frequency response for mid-sized and smaller rooms. Good extension. Port resonance at ~150 Hz. Quite gently sloping crossover. Relative good max SPL. Low distortion up to 100 dB, but the amp clips at higher levels. Low group delay down to 25 Hz. Fast decay too.

DIY Peerless XXLS 10" sealed 50L
Very good frequency response for smaller rooms. Quite limited max SPL. Low distortion at low SPL. Low group delay and fast decay.

DIY Rythmik Audio Direct Servo 12" sealed 56L
Extremely good extension. Very versatile frequency response adjustments. Can be used in larger and also in smaller rooms. Upper end of the frequency response rolls off above ~70 Hz. Quite high max SPL, but high deep bass distortion due to amp clipping. Brian says that he doesn’t want to use any limiters, but lets the amp clip/limit the output instead, so it doesn’t limit the dynamics. Low upper bass distortion, so the servo does its job well. Upper bass distortion mainly 2nd order distortion. Quite high deep bass power compression. Low group delay and fast decay. Good price/performance ratio.

DIY TC Sounds 2xTC-2000 15" sealed 140L
My own little subwoofer project. Frequency response shows that the drivers have quite high inductance. Workable with the help of EQ though. Really high max SPL at all frequencies. Extremely low compression. Could have gone higher but the amps clipped (two ~2000W amps). Low overall distortion. Low group delay and fast decay. Extremely “dead” though light enclosure.

DIY TC Sounds TC-2000 15" ported 270L
The very much discussed “LLT”. Very good extension and frequency response for larger rooms. Small rooms may have too much low end gain. Quite strong port resonance at ~160 Hz. High max SPL at all frequencies. Low compression up to 110 dB. The 115 dB was terminated due to amp clipping – not woofer bottoming. Low overall distortion, though the upper end could be cleaner. End cap to end cap resonance shows at ~75 Hz. Very low group delay for a ported subwoofer. Good decay too. The enclosure is naturally huge.

DIY TC Sounds TC-2000 15" sealed 90L
One more TC-2000 based subwoofer. A little bit flatter response, though T/S specs may be off (heavier cone). High SPL and low compression up to 105 dB. 115 dB sweep was terminated due to amp clipping. A little bit elevated deep bass and upper bass distortion. Low group delay and fast decay. The enclosure could be a bit heavier.
Ilkka is offline  
post #3 of 6 Old 07-30-07, 05:32 PM Thread Starter
Elite Shackster
 
Ilkka's Avatar
Ilkka
 
Join Date: Jun 2006
Location: Finland
Posts: 1,468
Re: DVDPlaza Subwoofer Tests Round 4, 5-6th of May 2007, Test Summary

HSU MBM-12
HSU’s mid bass subwoofer. Doesn’t go very low, but wasn’t meant to go. High max SPL above ~40 Hz. Low compression up to 110 dB. Relatively low distortion, though clearly rises up with level. Gently rising and quite low group delay. Fast decay. Pulled through the 105 dB SC test level. Works as it was designed to.

HSU VTF-3 MK3 ME
Traditionally lowered tuning frequency. Quite similar performance with the turbo version. Shows that the performance isn’t limited by the 4” port, but the woofer and the amplifier instead.

HSU VTF-3 MK3 MO
Best overall performance of the three different versions. Very flat frequency response. Suits well for larger rooms not having much low end room gain. Small rooms may have too much low end gain. High max SPL capability above 20 Hz. Quite a lot of power compression around the tuning frequency. Quite strong amp limiter. Low overall distortion but deep bass distortion grows pretty high at higher output levels. Quite high deep bass group delay. Some ringing around the tuning frequency.

HSU VTF-3 MK3 with Turbocharger
More extension and sub 20 Hz output compared to maximum output mode. Less mid and upper bass SPL. Port resonance at ~120 Hz. High deep bass power compression. Quite strong amp limiter. Low overall distortion but deep bass distortion grows high at higher output levels. Group delay stays under the 1 cycle curve. Some ringing around the tuning frequency.

Monitor Audio BRW10
Frequency response drops fast. Pretty much useless crossover. Strong port resonance at ~120 Hz. Reasonable upper bass max SPL but deep bass is totally missing. High overall distortion. Bad distortion spike at ~60 Hz. Low group delay and fast decay.

SVS 20-39PC+ 12 Hz (Plus 12.3)
More extension compared to 16 Hz and 20 Hz modes. Real 10 Hz extension. Naturally lower mid and upper bass max SPL. Really high deep bass power compression. Quite high deep bass distortion at higher output levels. Relatively low group delay. Considerable ringing around the tuning frequency.

SVS 20-39PC+ 16 Hz (Plus 12.3)
More extension compared to 20 Hz mode. Lower mid and upper bass max SPL compared to 20 Hz mode. High deep bass power compression. Low overall distortion, especially at reasonable output levels. Quite high deep bass group delay. Some ringing around the tuning frequency.

SVS 20-39PC+ 20 Hz (Plus 12.3)
Good extension, but the frequency response rises toward the low end. Small rooms may have too much low end gain. High max SPL capability above 20 Hz. Quite a lot of power compression around the tuning frequency. Low overall distortion. High deep bass group delay. Some ringing around the tuning frequency.

SVS PB12-NSD
Good extension and good frequency response for mid-sized and small rooms. High max SPL capability above 20 Hz. Power compression stays reasonable. Low overall distortion, also at higher output levels. Quite strong amp limiter. Group delay goes slightly above the 1 cycle curve at the low end. Not much ringing around the tuning frequency. Handles the SC test with low overall distortion.

SVS SB12-Plus
SVS’ smallest subwoofer. Pretty good extension and frequency response for smaller rooms. High upper bass max SPL capability but deep bass isn’t naturally nearly as strong. Quite strong amp limiter. Upper bass distortion stays low but deep bass distortion grows quite high. Group delay stays below the 1 cycle curve. Not much excessive ringing. Really small enclosure.

XTZ 99 W12 ME
Extension goes a bit better when one plugs one of the ports. Still no real subwoofer. Mid and upper bass max SPL goes naturally lower. Quite low mid and upper bass distortion at reasonable levels. Low group delay and fast decay.

XTZ 99 W12 MO
A Swedish subwoofer. Quite limited extension. Could be defined as a mid bass subwoofer. Lowest crossover setting not low enough. High upper bass max SPL capability. Quite low upper bass distortion at reasonable levels. Low group delay and fast decay. Quite good-looking and sturdy enclosure.
Ilkka is offline  
 
post #4 of 6 Old 08-11-07, 05:19 PM
Noah
 
Join Date: Jun 2007
Location: Mountain View
Posts: 75
Re: DVDPlaza Subwoofer Tests Round 4, 5-6th of May 2007, Test Summary

Illka,

Where are the complete test results w/power compression?

Your link in the Spring 2007 thread goes to a forum, and I'm not seeing which is the right thread.

Thanks
noah katz is offline  
post #5 of 6 Old 08-11-07, 06:04 PM Thread Starter
Elite Shackster
 
Ilkka's Avatar
Ilkka
 
Join Date: Jun 2006
Location: Finland
Posts: 1,468
Re: DVDPlaza Subwoofer Tests Round 4, 5-6th of May 2007, Test Summary

Quote:
noah katz wrote: View Post
Illka,

Where are the complete test results w/power compression?

Your link in the Spring 2007 thread goes to a forum, and I'm not seeing which is the right thread.

Thanks
Noah,

Each subwoofer has its own thread. There you can find the complete test results.
Ilkka is offline  
post #6 of 6 Old 08-12-07, 01:56 PM
Noah
 
Join Date: Jun 2007
Location: Mountain View
Posts: 75
Re: DVDPlaza Subwoofer Tests Round 4, 5-6th of May 2007, Test Summary

Thanks, I didn't notice thatr stickies had their own section and didn't scroll down far enough.
noah katz is offline  
 

Bookmarks

Tags
2007 , 56th , round , subwoofer , summary , test , tests

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in









Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome