Seaton MFW-15 Turbo SS - Page 12 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 159Likes
Reply
 
Thread Tools
post #331 of 365 Old 05-07-2017, 07:46 PM
Member
 
Join Date: Apr 2017
Location: St. Louis MO the gateway to the West
Posts: 36
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Liked: 13
Quote:
Originally Posted by Mark Seaton View Post
Good to hear everything arrived safely and you have it all connected.

Do double check the knob settings so the crossover is maxed clockwise, and the delay is at minimum (0ms). The controls and functions are given a brief overview in this thread on our forum.
Thanks Mark

I'll double check those settings before I run audyssey.

So far this subwoofer is now truly a beast, and can rattle my entire home... I can hardly imagine how much more it is going to be able to do once it has the new drop in turbo woofer... Right now it's pretty amazing since it was something that 2 original MFW - 15 's never could even when cranked to the max... I did have 2 of them here at 1 time and sold it ....

I got 2 movies I have to play tomorrow, you know which ones... Lol... Open Range and Saving Private Ryan.. I need to wait until everyone is out of the house to really turn it loose.. I got a feeling I might be breaking a few dishes in the cabinets........

Mac
St.Louis Mac is offline  
Sponsored Links
Advertisement
 
post #332 of 365 Old 05-08-2017, 12:33 PM - Thread Starter
AVS Forum Special Member
 
XBR11's Avatar
 
Join Date: Apr 2008
Location: Florida
Posts: 1,132
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 449 Post(s)
Liked: 243
What sort of improvement can be gained by replacing the stock AV123 driver with Seaton turbo driver (and getting the Seaton amp tuned for that driver)?

_______________________________________________
[Hey, what does that Acronym mean?! Click here to learn.]
XBR11 is offline  
post #333 of 365 Old 05-08-2017, 02:01 PM
Member
 
Join Date: Apr 2017
Location: St. Louis MO the gateway to the West
Posts: 36
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Liked: 13
Quote:
Originally Posted by XBR11 View Post
What sort of improvement can be gained by replacing the stock AV123 driver with Seaton turbo driver (and getting the Seaton amp tuned for that driver)?
I can tell you this much, just replacing the amp is a huge improvement with a stock driver. It is hitting harder, and digging deeper than it ever could muster.

I've had mine for many years and it's never gone as low as it does now, just with the new amp. Folks say that having the Turbo is like having 2x the output, and I can see that, but I think that it's going to be a lot more musical with faster attacks over the stock woofer.. Atleast that's how I read it

https://www.google.com/amp/s/tapatal...035/161218/amp


Mac
St.Louis Mac is offline  
 
post #334 of 365 Old 05-08-2017, 02:04 PM
AVS Forum Special Member
 
Mark Seaton's Avatar
 
Join Date: Jul 2000
Location: Chicago, IL, USA
Posts: 6,723
Mentioned: 101 Post(s)
Tagged: 0 Thread(s)
Quoted: 682 Post(s)
Liked: 1841
Quote:
Originally Posted by XBR11 View Post
What sort of improvement can be gained by replacing the stock AV123 driver with Seaton turbo driver (and getting the Seaton amp tuned for that driver)?
The new driver will have more than double the linear and mechanical excursion as the original MFW-15 driver. The 700W ICEpower amplifier and some creative use of the DSP processing allow me to further polish the response of the original and allow for a much more graceful overload which allows owners to get good sound much closer to the limits of the sub. The driver upgrade will be another significant bump in output, while also being lower distortion across the range, but especially at lower frequencies. I will post on our forum when we have a production date settled for the driver. We have many products in the pipeline right now, so along with finalizing the design, timing may be dependent on other items getting delivered first.
chucky7 likes this.

Mark Seaton
Seaton Sound, Inc.
"Make no little plans; they have no magic to stir men's blood..." Daniel H. Burnham

Last edited by Mark Seaton; 05-08-2017 at 02:07 PM.
Mark Seaton is offline  
post #335 of 365 Old 05-09-2017, 11:11 AM - Thread Starter
AVS Forum Special Member
 
XBR11's Avatar
 
Join Date: Apr 2008
Location: Florida
Posts: 1,132
Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 449 Post(s)
Liked: 243
Feet for AV123 Subwoofer

Back in April I wrote Mark Seaton and asked him
Quote:
For my AV123 MFW15 subwoofer, do you know the size of the screws that hold the feet onto the subwoofer?

When I bought the sub used, it came without any feet. I have since bought some feet, but I can not find a screw that fits. Never knew there were so many diameters and thread counts, and us and metric. I even took a foot screw out of my Seaton subwoofer, but it does not fit.

For those with the same sort of question, here is his answer:
Quote:
There were a few versions, over the life of the product with AV123, but if it's the large brass insert, it is likely an M8 thread. The problem is you won't find too many feet with a hole big enough for that (which is about 5/16"). For the originals I had found some M8 to M5 or M8 to #10-24 thread reducers like these.


IF there is anyone with old unwanted feet on their AV123 MFW15 subwoofer, please contact me.

_______________________________________________
[Hey, what does that Acronym mean?! Click here to learn.]
XBR11 is offline  
post #336 of 365 Old 05-09-2017, 12:32 PM
AVS Forum Special Member
 
Mark Seaton's Avatar
 
Join Date: Jul 2000
Location: Chicago, IL, USA
Posts: 6,723
Mentioned: 101 Post(s)
Tagged: 0 Thread(s)
Quoted: 682 Post(s)
Liked: 1841
Quote:
Originally Posted by XBR11 View Post
Back in April I wrote Mark Seaton and asked him

Quote:
For my AV123 MFW15 subwoofer, do you know the size of the screws that hold the feet onto the subwoofer?

When I bought the sub used, it came without any feet. I have since bought some feet, but I can not find a screw that fits. Never knew there were so many diameters and thread counts, and us and metric. I even took a foot screw out of my Seaton subwoofer, but it does not fit.

For those with the same sort of question, here is his answer:
Quote:
There were a few versions, over the life of the product with AV123, but if it's the large brass insert, it is likely an M8 thread. The problem is you won't find too many feet with a hole big enough for that (which is about 5/16"). For the originals I had found some M8 to M5 or M8 to #10-24 thread reducers like these.

IF there is anyone with old unwanted feet on their AV123 MFW15 subwoofer, please contact me.
I do NOT recommend using the original spikes. I had immediately recommended AV123 stop shipping with these once I saw them as they are too narrow and tall for a subwoofer this heavy. More than a few customers had the inserts break out of the bottom of their MFW, especially if they tried to tip the sub up on the feet at all. I recommend finding an M8-M5 or M8-#10 thread adapter and use rubber feet or spikes if you can find them with the correct threading.

Mark Seaton
Seaton Sound, Inc.
"Make no little plans; they have no magic to stir men's blood..." Daniel H. Burnham
Mark Seaton is offline  
post #337 of 365 Old 06-29-2017, 05:24 PM
Member
 
Blood Simple's Avatar
 
Join Date: Jan 2005
Posts: 156
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 74 Post(s)
Liked: 102
Quote:
Originally Posted by chucky7 View Post
we listened to Seaton MFW-15 Turbo SS shortly after PSA V1801. I found no audible difference between the PSA V1801 and the Seaton MFW-15 Turbo SS. IMHO, PSA V1801 is not worth $400 more than the Seaton MFW-15 Turbo SS.
Quote:
Originally Posted by Marc Alexander View Post
Once the B-stock MoHo cabs are depleted I believe Seaton's cabinet shop is already capable of building the cabs. Just know that the price new will likely be nearer to that of a PSA V1801 so if you are considering the MFW-15, jump on a B-stock cab. The value is tremendous.

Its crazy that these haven't sold out yet. The MFW is trading blows with an 18" sub that costs substantially more $. I absolutely love mine. I have thrown everything but the kitchen sink at it. And still I haven't been able to make it audibly chuff or break a sweat. Bar none, best value in the market.
chucky7 and tr4a like this.
Blood Simple is offline  
post #338 of 365 Old 06-29-2017, 08:49 PM
AVS Forum Special Member
 
CruelInventions's Avatar
 
Join Date: Mar 2004
Location: Chicago-ish
Posts: 5,578
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 630 Post(s)
Liked: 778
Quote:
Originally Posted by Blood Simple View Post
Its crazy that these haven't sold out yet. ..
They are, for all practical purposes. Or maybe for all purposes.

A few months ago, I think they were down to only a few drivers left and a few moderately ok condition cabinets.

Quote:
The first principle is that you must not fool yourself and you are the easiest person to fool. ~ Richard P. Feynman
CruelInventions is offline  
post #339 of 365 Old 06-29-2017, 09:20 PM
Advanced Member
 
WormInfested's Avatar
 
Join Date: Apr 2007
Location: Everett, WA
Posts: 501
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 96 Post(s)
Liked: 64
Quote:
Originally Posted by Blood Simple View Post
Its crazy that these haven't sold out yet. The MFW is trading blows with an 18" sub that costs substantially more $. I absolutely love mine. I have thrown everything but the kitchen sink at it. And still I haven't been able to make it audibly chuff or break a sweat. Bar none, best value in the market.
i don't think the mfw turbo is heavily advertised either but doesn't matter since the turbos are just as strong. i might not have the turbos but i'm waiting to get my hands on two of the newer drivers once available. until then i'm using an inuke 3000dsp to power my dual mfw 15's. i'm hitting nearly flat down to 9 hz in a small room with mine.

Pioneer Elite SC-05
JBL Studio speakers
Power Sound Audio V1800, 2 MFW-15's, DIY ported UM18-22, SVS PB10-NSD
Oppo BDP-103
BenQ W7500 & Silverticket 110" matte white 16:9
Benq HT2050 2nd system-pvc foam board screen
WormInfested is offline  
post #340 of 365 Old 06-30-2017, 07:22 AM
AVS Forum Special Member
 
Mark Seaton's Avatar
 
Join Date: Jul 2000
Location: Chicago, IL, USA
Posts: 6,723
Mentioned: 101 Post(s)
Tagged: 0 Thread(s)
Quoted: 682 Post(s)
Liked: 1841
Quote:
Originally Posted by Blood Simple View Post
Its crazy that these haven't sold out yet. The MFW is trading blows with an 18" sub that costs substantially more $. I absolutely love mine. I have thrown everything but the kitchen sink at it. And still I haven't been able to make it audibly chuff or break a sweat. Bar none, best value in the market.
While the testing shows just how much more there is to a subwoofer than just the CEA burst output, the recent GTG showed the MFW-15 Turbo delivering more in the 16-25Hz range while giving up some headroom above there to the V1801 that is 2" wider with same height and depth. I do think there are too many variables in the setup and time span to get too caught up in 1-3dB differences from those numbers, but it follows the subjective observations of barely more loudness in listening from the V1801.

With the two we shipped out this past week I am pretty well out of the MFW-15 Turbo units. I believe we have 1-2 drivers around the shop from my test units, but at this point we are waiting for the new turbo woofers which will lower distortion to a level comparable to our F18 driver while we will be able to deliver in known time frames after the first batch arrives. October to end of November time frame is most likely. I'm still looking at a few construction methods and port implementations to keep pricing attractive on a production version at some point in the future. The reasonable size of the MFW-15 with its impressive output and more great room friendly appearance still only has a couple options on the market to directly compare with.

Mark Seaton
Seaton Sound, Inc.
"Make no little plans; they have no magic to stir men's blood..." Daniel H. Burnham
Mark Seaton is offline  
post #341 of 365 Old 06-30-2017, 03:21 PM
AVS Forum Special Member
 
Marc Alexander's Avatar
 
Join Date: Aug 2001
Location: Inland Empire, CA
Posts: 9,729
Mentioned: 94 Post(s)
Tagged: 0 Thread(s)
Quoted: 2628 Post(s)
Liked: 2500
Attached is my CEA-2010 test report. Unfortunately the EMM-6 microphone's response falls of a cliff below 20Hz. Even though the mic is calibrated, the compensation raises the noise floor and affects the accuracy. I wouldn't use these numbers to make a direct comparison to numbers found elsewhere, only to other subs that I have tested with this same mic.
Attached Files
File Type: pdf MFW-15 Turbo SS.pdf (186.4 KB, 49 views)
Marc Alexander is online now  
post #342 of 365 Old 07-02-2017, 02:20 AM
AVS Forum Special Member
 
blake18's Avatar
 
Join Date: Feb 2005
Posts: 1,476
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 315 Post(s)
Liked: 191
Quote:
Originally Posted by Marc Alexander View Post
Attached is my CEA-2010 test report. Unfortunately the EMM-6 microphone's response falls of a cliff below 20Hz. Even though the mic is calibrated, the compensation raises the noise floor and affects the accuracy. I wouldn't use these numbers to make a direct comparison to numbers found elsewhere, only to other subs that I have tested with this same mic.
Can't see the image. How would you say the Turbo compares to the PB13, Rythmik fv15hp, and the HSU VTF-15h mk2?
blake18 is offline  
post #343 of 365 Old 07-02-2017, 07:52 AM
Advanced Member
 
B T C's Avatar
 
Join Date: Mar 2014
Location: Lansing, MI via Kentucky, Georgia & Tennessee
Posts: 655
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 479 Post(s)
Liked: 159
Quote:
Originally Posted by blake18 View Post
Can't see the image. How would you say the Turbo compares to the PB13, Rythmik fv15hp, and the HSU VTF-15h mk2?
Did you click the link? Doing so will download a PDF. You may need to install Adobe Acrobat Reader, which is free, in order to view the file.

https://acrobat.adobe.com/us/en/acrobat/pdf-reader.html
B T C is offline  
post #344 of 365 Old 07-03-2017, 06:53 AM
AVS Forum Addicted Member
 
basshead81's Avatar
 
Join Date: Mar 2013
Location: Fort Wayne, IN
Posts: 11,863
Mentioned: 126 Post(s)
Tagged: 0 Thread(s)
Quoted: 238 Post(s)
Liked: 6519
I honestly expected to see better numbers...especially since it was mentioned that it gave the V1801 a run for its money. The driver appears to have fairly high inductance with the 50hz peak and not that efficient with the upper end roll off.
basshead81 is offline  
post #345 of 365 Old 07-03-2017, 07:15 AM
Advanced Member
 
Docethic's Avatar
 
Join Date: Oct 2012
Location: Manchester, NH
Posts: 522
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 314 Post(s)
Liked: 272
Quote:
Originally Posted by basshead81 View Post
I honestly expected to see better numbers...especially since it was mentioned that it gave the V1801 a run for its money. The driver appears to have fairly high inductance with the 50hz peak and not that efficient with the upper end roll off.
It's definitely not suited for an MBM but for a sub its size its low end output is pretty good and is balanced in it's performance. It does appear to best the v1801 in the 16-25 hz range where the v1801 is supposed to improve upon the v1800.
Docethic is online now  
post #346 of 365 Old 07-03-2017, 07:23 AM
AVS Forum Addicted Member
 
basshead81's Avatar
 
Join Date: Mar 2013
Location: Fort Wayne, IN
Posts: 11,863
Mentioned: 126 Post(s)
Tagged: 0 Thread(s)
Quoted: 238 Post(s)
Liked: 6519
Quote:
Originally Posted by Docethic View Post
It's definitely not suited for an MBM but for a sub its size its low end output is pretty good and is balanced in it's performance. It does appear to best the v1801 in the 16-25 hz range where the v1801 is supposed to improve upon the v1800.
the V1801 hit 99, 106.4, 109.8db in the 16,20,25hz and is basically the same size as the Turbo SS overall.
basshead81 is offline  
post #347 of 365 Old 07-03-2017, 07:31 AM
AVS Forum Special Member
 
bscool's Avatar
 
Join Date: Mar 2013
Location: North Dakota
Posts: 1,108
Mentioned: 38 Post(s)
Tagged: 0 Thread(s)
Quoted: 692 Post(s)
Liked: 552
Quote:
Originally Posted by basshead81 View Post
the V1801 hit 99, 106.4, 109.8db in the 16,20,25hz and is basically the same size as the Turbo SS overall.
Hmm I know Marc has posted different PDFs the one I have shows lower numbers for the V1801 16 Hz 90.5,
20 Hz 102.7, 25 Hz 108.8.

HTPC, Sony 40es, 120" Silver Ticket, 7702mkii, Sunfire Amp 225w, JBL 590, JBL 520

PSA XS30, Seaton Submersive, 2 Um-18 8cf sealed, Outlaw Ultra x 12, Kappa Pro 18LF, BFM Tuba 60 horn, B&C 18TBW100 6cf 41hz, 34hz, 28hz tune

iNuke 3000 & 6000 DSP's, Crowson Motion Actuator
bscool is online now  
post #348 of 365 Old 07-03-2017, 07:31 AM
Advanced Member
 
Docethic's Avatar
 
Join Date: Oct 2012
Location: Manchester, NH
Posts: 522
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 314 Post(s)
Liked: 272
Quote:
Originally Posted by basshead81 View Post
the V1801 hit 99, 106.4, 109.8db in the 16,20,25hz and is basically the same size as the Turbo SS overall.
We must be looking at different numbers. I am only looking at Marc's recent test numbers which is the only source of MFW output numbers I believe, so just comparing apples to apples. If he posted updated V1801 figures, I apologize. The ones I saw were 90.5, 102.7, and 108.8 vs 94.8, 103.8, and 109.6 for the MFW.
Docethic is online now  
post #349 of 365 Old 07-03-2017, 07:38 AM
AVS Forum Special Member
 
bscool's Avatar
 
Join Date: Mar 2013
Location: North Dakota
Posts: 1,108
Mentioned: 38 Post(s)
Tagged: 0 Thread(s)
Quoted: 692 Post(s)
Liked: 552
Yeah, those # are for an offset SoCal/LAAVA.org Spring 2017 Subwoofer meet Chucky posted(I think he added that to compare them to Databass #s). If you compare the # with no offset the Seaton has more output below 31hz.

Edit: He states "So I did some number crunching to figure out the offset between Marc's RMS numbers and those on Data-bass. The following is the Marc's PSA V1801 RMS results adjusted for the offset."

HTPC, Sony 40es, 120" Silver Ticket, 7702mkii, Sunfire Amp 225w, JBL 590, JBL 520

PSA XS30, Seaton Submersive, 2 Um-18 8cf sealed, Outlaw Ultra x 12, Kappa Pro 18LF, BFM Tuba 60 horn, B&C 18TBW100 6cf 41hz, 34hz, 28hz tune

iNuke 3000 & 6000 DSP's, Crowson Motion Actuator
bscool is online now  
post #350 of 365 Old 07-03-2017, 07:58 AM
AVS Forum Addicted Member
 
basshead81's Avatar
 
Join Date: Mar 2013
Location: Fort Wayne, IN
Posts: 11,863
Mentioned: 126 Post(s)
Tagged: 0 Thread(s)
Quoted: 238 Post(s)
Liked: 6519
basshead81 is offline  
post #351 of 365 Old 07-03-2017, 08:07 AM
AVS Forum Special Member
 
bscool's Avatar
 
Join Date: Mar 2013
Location: North Dakota
Posts: 1,108
Mentioned: 38 Post(s)
Tagged: 0 Thread(s)
Quoted: 692 Post(s)
Liked: 552
Quote:
Originally Posted by basshead81 View Post
I thought those were the "no chuff" numbers?
From the V1801 PDF

CEA-2010 No Chuff
10 Hz
12.5 Hz
16 Hz 90.5 84.8
20 Hz 102.7 91.4
25 Hz 108.8 97.9
31.5 Hz 119.6 103.4

Edit from MFW-15 PDF

CEA-2010 No Chuff
10 Hz
12.5 Hz 84.8 76.2
16 Hz 94.8 87.6
20 Hz 103.8 93.9
25 Hz 109.6 99.6
31.5 Hz 112.7 100.5

HTPC, Sony 40es, 120" Silver Ticket, 7702mkii, Sunfire Amp 225w, JBL 590, JBL 520

PSA XS30, Seaton Submersive, 2 Um-18 8cf sealed, Outlaw Ultra x 12, Kappa Pro 18LF, BFM Tuba 60 horn, B&C 18TBW100 6cf 41hz, 34hz, 28hz tune

iNuke 3000 & 6000 DSP's, Crowson Motion Actuator

Last edited by bscool; 07-03-2017 at 08:25 AM.
bscool is online now  
post #352 of 365 Old 07-03-2017, 08:29 AM
AVS Forum Special Member
 
Marc Alexander's Avatar
 
Join Date: Aug 2001
Location: Inland Empire, CA
Posts: 9,729
Mentioned: 94 Post(s)
Tagged: 0 Thread(s)
Quoted: 2628 Post(s)
Liked: 2500
The confusion comes from @chucky7 applying a correction curve to correlate the numbers to data-bass.com (and the rest of his charts). Chucky's ajusted numbers for the MFW will be much higher down low.

I personally feel like my measurement numbers can only be accurately compared to each other. The margin of error is too great below 20Hz due to the inacuracy of the EMM-6 microphone below 20Hz. While it is calibrated by CSL down to 5Hz the compensation curve also raises the noise floor.
Mark Seaton likes this.
Marc Alexander is online now  
post #353 of 365 Old 07-03-2017, 08:49 AM
AVS Forum Addicted Member
 
basshead81's Avatar
 
Join Date: Mar 2013
Location: Fort Wayne, IN
Posts: 11,863
Mentioned: 126 Post(s)
Tagged: 0 Thread(s)
Quoted: 238 Post(s)
Liked: 6519
Quote:
Originally Posted by bscool View Post
From the V1801 PDF

CEA-2010 No Chuff
10 Hz
12.5 Hz
16 Hz 90.5 84.8
20 Hz 102.7 91.4
25 Hz 108.8 97.9
31.5 Hz 119.6 103.4

Edit from MFW-15 PDF

CEA-2010 No Chuff
10 Hz
12.5 Hz 84.8 76.2
16 Hz 94.8 87.6
20 Hz 103.8 93.9
25 Hz 109.6 99.6
31.5 Hz 112.7 100.5
That makes no sense...the V1801 I had never even came close to chuffing at 31hz. I had it playing over 120db. I do agree the 118HT bests the V1801 down low from what I read, but the numbers do not make any sense. Again I was able to get much more output then what is being claimed out of the V1801 without Chuffing.
basshead81 is offline  
post #354 of 365 Old 07-03-2017, 09:11 AM
AVS Forum Special Member
 
Marc Alexander's Avatar
 
Join Date: Aug 2001
Location: Inland Empire, CA
Posts: 9,729
Mentioned: 94 Post(s)
Tagged: 0 Thread(s)
Quoted: 2628 Post(s)
Liked: 2500
Quote:
Originally Posted by basshead81 View Post
That makes no sense...the V1801 I had never even came close to chuffing at 31hz. I had it playing over 120db. I do agree the 118HT bests the V1801 down low from what I read, but the numbers do not make any sense. Again I was able to get much more output then what is being claimed out of the V1801 without Chuffing.
Here is the list of GTG attendees that witnessed the V1801 behavior.

June 17th @Marc Alexander @fookoo_2010 @zaywop @Ese @ivanpino @Toc @kyzer soze @xcjago @chucky7 (Cap 1400) @dschulz @asarose247 (DIY) @bulls @zaywop @sdurani

Room size can make a big difference. Basically the room(s) in which we were testing amount to ~7500ft³ with 3 (2 large) openings to the rest of the house. You likely experienced much more room gain.

When I went to Bulls' house to confirm the behavior two V1801s in a slightly smaller space did not chuff badly at 31.5Hz. 25Hz performance was better but 20Hz & 16Hz were not good.
Marc Alexander is online now  
post #355 of 365 Old 07-03-2017, 09:15 AM
AVS Forum Special Member
 
Marc Alexander's Avatar
 
Join Date: Aug 2001
Location: Inland Empire, CA
Posts: 9,729
Mentioned: 94 Post(s)
Tagged: 0 Thread(s)
Quoted: 2628 Post(s)
Liked: 2500
Quote:
Originally Posted by bscool View Post
From the V1801 PDF

CEA-2010 No Chuff
10 Hz
12.5 Hz
16 Hz 90.5 84.8
20 Hz 102.7 91.4
25 Hz 108.8 97.9
31.5 Hz 119.6 103.4

Edit from MFW-15 PDF

CEA-2010 No Chuff
10 Hz
12.5 Hz 84.8 76.2
16 Hz 94.8 87.6
20 Hz 103.8 93.9
25 Hz 109.6 99.6
31.5 Hz 112.7 100.5
Please keep in mind that these numbers are all measurements outside at 2m GP so no room gain whatsoever. The no-chuff numbers are right before the onset of chuffing.

The MFW-15 chuffs but it is barely noticeable compared to the V1801. Unless you are specifically looking for it you may never notice a chuff out of the MFW-15.
Marc Alexander is online now  
post #356 of 365 Old 07-03-2017, 09:31 AM
AVS Forum Addicted Member
 
basshead81's Avatar
 
Join Date: Mar 2013
Location: Fort Wayne, IN
Posts: 11,863
Mentioned: 126 Post(s)
Tagged: 0 Thread(s)
Quoted: 238 Post(s)
Liked: 6519
Quote:
Originally Posted by Marc Alexander View Post
Here is the list of GTG attendees that witnessed the V1801 behavior.

June 17th @Marc Alexander @fookoo_2010 @zaywop @Ese @ivanpino @Toc @kyzer soze @xcjago @chucky7 (Cap 1400) @dschulz @asarose247 (DIY) @bulls @zaywop @sdurani

Room size can make a big difference. Basically the room(s) in which we were testing amount to ~7500ft³ with 3 (2 large) openings to the rest of the house. You likely experienced much more room gain.

When I went to Bulls' house to confirm the behavior two V1801s in a slightly smaller space did not chuff badly at 31.5Hz. 25Hz performance was better but 20Hz & 16Hz were not good.
I am not disagreeing that you experienced port noise, but the numbers do not add up far as the levels you start getting the sub to chuff is what I am saying. I was able to get around 120db @ 31hz in room with no port noise. I find it hard to believe that it had port noise outdoors hitting 103.4db. Again I was able to get port noise with REW sweeps at -5 or higher. I had to bump the sweep starting point to 20hz and it went away.


I just read back through the GTG thread and seen that the general consensus was the Turbo SS kept up well down low vs the V1801. That is pretty impressive for sure!
basshead81 is offline  
post #357 of 365 Old 07-03-2017, 09:34 AM
AVS Forum Special Member
 
Marc Alexander's Avatar
 
Join Date: Aug 2001
Location: Inland Empire, CA
Posts: 9,729
Mentioned: 94 Post(s)
Tagged: 0 Thread(s)
Quoted: 2628 Post(s)
Liked: 2500
Quote:
Originally Posted by basshead81 View Post
I am not disagreeing that you experienced port noise, but the numbers do not add up far as the levels you start getting the sub to chuff is what I am saying. I was able to get around 120db @ 31hz in room with no port noise. I find it hard to believe that it had port noise outdoors hitting 103.4db. Again I was able to get port noise with REW sweeps at -5 or higher. I had to bump the sweep starting point to 20hz and it went away.


I just read back through the GTG thread and seen that the general consensus was the Turbo SS kept up well down low vs the V1801. That is pretty impressive for sure!
The numbers are not in room. They are outside 2m GP RMS. And they are at the initial onset of chuffing, likely not audible inside so I get your point. We felt that was the best way to present the data across the board.
Marc Alexander is online now  
post #358 of 365 Old 07-03-2017, 09:55 AM
AVS Forum Special Member
 
chucky7's Avatar
 
Join Date: Apr 2002
Location: Rancho Cucamonga, CA
Posts: 2,665
Mentioned: 134 Post(s)
Tagged: 0 Thread(s)
Quoted: 1793 Post(s)
Liked: 1970
Quote:
Originally Posted by basshead81 View Post
That makes no sense...the V1801 I had never even came close to chuffing at 31hz. I had it playing over 120db. I do agree the 118HT bests the V1801 down low from what I read, but the numbers do not make any sense. Again I was able to get much more output then what is being claimed out of the V1801 without Chuffing.
Marc's numbers are CEA 2010 2M GP RMS numbers.

The 120 dB numbers you speak of were from 4 subs playing indoor with probably 15 dB of gain according to your buddy at PSA plus the other speakers while playing bassy clips.

They are apples and oranges. I don't know why you keep arguing.

Panasonic TC-P55UT50
Pioneer SC-1222-K
Polk Audio LSiM703 / LSiM706c / RTiA3
JTR Captivator 1400

Last edited by chucky7; 07-03-2017 at 11:41 AM.
chucky7 is online now  
post #359 of 365 Old 07-03-2017, 10:11 AM
AVS Forum Addicted Member
 
basshead81's Avatar
 
Join Date: Mar 2013
Location: Fort Wayne, IN
Posts: 11,863
Mentioned: 126 Post(s)
Tagged: 0 Thread(s)
Quoted: 238 Post(s)
Liked: 6519
Quote:
Originally Posted by chucky7 View Post
Marc's numbers are CEA 2010 2M GP RMS numbers.

The 120 dB numbers you speak of were from 4 subs playing indoor with probably 15 dB of gain according to your body at PSA plus the other speakers while playing bassy clips.

They are apples and oranges. I don't know why you keep arguing.
I know what his numbers are.

I am talking about playing the V1801 by itself, which is what I did for the first couple weeks I had it in my room. 4 subs hit well over 130db in my room.


I am not getting 15db of gain @ 31hz...factoring distance losses from 14ft, I would be lucky to get +6db.
basshead81 is offline  
post #360 of 365 Old 07-04-2017, 11:43 PM
AVS Forum Special Member
 
blake18's Avatar
 
Join Date: Feb 2005
Posts: 1,476
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 315 Post(s)
Liked: 191
Quote:
Originally Posted by bscool View Post
Quote:
Originally Posted by basshead81 View Post
I thought those were the "no chuff" numbers?
From the V1801 PDF

CEA-2010 No Chuff
10 Hz
12.5 Hz
16 Hz 90.5 84.8
20 Hz 102.7 91.4
25 Hz 108.8 97.9
31.5 Hz 119.6 103.4

Edit from MFW-15 PDF

CEA-2010 No Chuff
10 Hz
12.5 Hz 84.8 76.2
16 Hz 94.8 87.6
20 Hz 103.8 93.9
25 Hz 109.6 99.6
31.5 Hz 112.7 100.5
How does the MFW-15 Turbo compare to the HSU VTF-15h mk2?
blake18 is offline  
Sponsored Links
Advertisement
 
Reply Subwoofers, Bass, and Transducers

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


Forum Jump: 

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 code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off