NEW MFW-15 amps (May 2010) *pics* - Page 14

I believe distance has more to do with time delay.

I bought a v.2 around christmas do all the v.2's have the same phase? I've never bothered to adjust it because honestly I have no idea what it does. Although I'm searching the forum and googling right now. I read earlier someone said the v.2's are best at 180 degrees?

Some receivers have a phase setting which could compensate for a sub without one.

Phase refers to offset of an audio signal. So imagine a sine wave, now shift it, and overlay the shifted one, such that there are peaks on one where there are valleys on the other. They are 180 degrees out of phase.

The phase control compensates for situations where sub is out of phase with the other speakers. This could lead to less bass, due to canceling.

There are places online which explain how to adjust phase controls.

Here's one (I did not read it) -

http://www.soundonsound.com/sos/jul0...subwoofers.asp

KlipschHead281, I just read through this entire thread since I just purchased this sub. I'm just wondering if maybe you tightening down the transformer is causing your loss of power. I really have no idea if this could be a problem or not, but I notice no one else tightened theirs down. I did a quick Google search on tightening down this type of transformer and it seems that they can be damaged by doing this. Just wondering...

It's not a loss of power he's seeing (or hearing), it's a loss in gain. And as for over-tightening the toroid screw, over-tightening will only result in a loss of ALL power (and smoke!)

Ok, like I said, I have no idea...

I have V1 amps and a V2 (mid-'09?) amp. The V2 is 180° out of phases with the V1s.

just out of curiosity...has ANYONE ever tried an aftermarket driver in one of these MFW's with the stock amp? and if you did, please post your results???

I still have my 2 palisander rosa v1's and they pound, but i also from day one had to back off my gain to keep the drivers from bottoming out on bass heavy scenes. I have them dialed in pretty well now and they pound the **** outta my house...never really had any problems other than the slight hum....

but i always felt the drivers were underclassed for these amps and that a beefier more long throw cast basket driver would have done wonders for this sub. I don't think the amps (at least v1) are underpowered at all..in fact i think they are overpowered for the drivers that ship in these MFW-15's. I have told MLS and av123 this before...but i never heard of anyone actually putting a different beefier driver in the stock cabinet/amp.

i'd REALLY like to see some numbers to prove this. some before and after turbo upgrade if you have them.

in fact i'm stunned that Seaton or Kevin have not release some "official" numbers to justify the upgrade. and even more stunned that people are buying it without any proven numbers considering the costs. i'm sure it is better, but how much better?

Hearing is believing.

well i think i'm going to head over to Sandbaggers tomorrow to hear one for myself.

I asked Kevin about this some time ago, and he brought up a very good point: Which amp version would they compare - v1, v2, or this new v3? And should they decide which stock amp to compare against, they would need to have one that was working exactly as designed so that an adequate comparison could be done.

Food for thought...

Why not just use any version or all of them if that were an option and just state what version they used. I don't think it's a very good point at all.

I'm definitely interested in the upgrade but I hate to say it, and no offense to Kevin or Mark, it still will make people wonder why they haven't posted the numbers up for an A and B comparison. Like they're trying to hide something. Even if they really aren't trying to hide something.

Wow. I hadn't been here in a while, so I thought I'd pop in to catch the latest turns in the drama - something like the big guy being jailed or something along those lines. This new amp... you've got to be kidding... Glad I've never needed a replacement. Mine has worked flawlessly for some time now. I'll burn my MFW in the back yard before I ever install one of those. Just... wow.

Aside from the new amp not having some of the features the old ones do, and looking a little cheesy. They do work great so far for pretty much everyone. Seems as though only 1 person got a bad amp.

So if your amp dies and you'd rather not have a newer amp, I'll gladly take that MFW off your hands...

yadfgp,

If you heard a Turbo, you'd understand the hype. It's not just the output that has increased, but the SQ as well. You also have the piece of mind knowing that quality components are being used and not the pathetic junk that comes stock on the MFW.

I just take a pictures of my setup, one MFW-15 first model is in it, and problems at all for almost 2 years:

http://www.laneros.com/showpost.php?...&postcount=309

This is a page from Colombia, if you don´t know spanish just look at the photos xD, first is my previous tiny room and setup, and the others are my new setup.

LOL, I love this.

Let me get this straight... there have been three different amps versions, and the specs very from individual unit to unit from what they are supposed to be within those three amp variations? As none of they older amps work the way they were supposed too anyway, there is no need to compare measurements with a new setup, as who knows what you had to begin with.

LOL, that is too much.

I agree, I have been using my turbo for a while now and there is no comparing it to the original. For any measurements to show the significance of this upgrade they would have to include alot more than pure output. I find many measurements useless especially for subwoofers due to room interactions. However, mark designed the original enclosure so he of all people should know what it is capable of without the rescrictions that av321 put on the driver and amp. That has borne itself out in my experience with the turbo.

well i have 2 original v1 amps working perfectly and i could easily either bring it over to Kevin's house or he could bring his modded ones over here to do a side by side test. i'd be willing to do it.

Jinx that sounds like the best solution possible to shut the naysayers up. But they would still find something to bitch and complain about

actually i'm skeptical of the costs vs benefit as well. i'm sure it is more powerful and sounds great, but....at $700-800.00 i'm not sure it's worth the upgrade. of course, i would be happy to say it is IF i found that the performance really was THAT much better. it would have to be leagues better though.

It would be yours for the taking. Some nights, I lie in bed sleepless, wondering why it still works. What did I do to deserve this? Oh, how I wish I just had an excuse to take an axe to that satin black MDF box... Oh, how delightful, how liberating that would be.

Any driver will bottom out, new drivers will only do the same. Its been said before, these amps have a lot in the tank for the drivers, some scenes will bottom them out if you run them hot. I don't have any problems with bottoming mine out, but some powerful scenes do supprise me sometimes depending on the mix of the movie. Bottoming out has more to do with the suspension of the driver and Ex. limiting of the box.

I think you might be a bass head like me.

I think they'r just being nice.

Mostly it has been a lower priority for me as we work on the driver supply and kit availability. While I make a lot more on these kits than I did on the sale of original MFW-15s (that's not hard! ), this kit is more a matter of offering a solid, quality option to owners who want more from their MFW-15 than AV321 was able to provide. If Kevin wasn't doing most of the legwork, it likely wouldn't have happened given all I have on my plate with Seaton Sound.

Until we are confident in when we'll have a pile of kits available to ship out, appeasing the skeptics is of little concern, as those will be the same guys harassing us weekly and complaining why they can't buy one yet.

The irony is that all of you purchased the MFW-15 without such measurements, so all that really matters is the relative change. Kevin & I have described what the improvements are and what that translates to in real listening. We now have a handful of the first upgraders with the kit installed observing changes right in line with what was we suggested. My own MFW-15 has been Turbo'd and is at Kevin's so I don't have one handy to do the comparison. I *hope* and intend to have time to do a set of measurements on someone's MFW-15 vs. the Turbo version once we're set to deliver a bunch.

This kit wasn't intended to be an AV321 style bargain. It is intended as a premium option with very high confidence in delivering an obvious improvement in sound quality, performance, overall build quality, and attention to detail. Perceived value is always a personal measure. I had no expectation of Pure-Evil finding this to be a good deal when his reference point of value was obviously un-sustainable prices and quality from AV321. If he does find this of interest I take that as a very nice compliment to what is being offered.

Thanks Mark, I was eating my lunch at my desk when I read this and literally choked on a piece of chicken as I was cracking up!

Mark...I never said it "wasn't" a good value, I said that I would like to see some numbers to show the difference. It certainly is not a cheap upgrade, but...it might be worth it to do. I actually think the the upgrade is very interesting....just not sure about the cost vs performance ratio ..but then what do i know?

Mark Seaton... I guess my biggest question is why you can say the MFW-15 is not a performer when you were the one who designed it? Are you saying that AV1234 used a driver you didn't pick? changed the design from what you started with? used different specs? I'm confused here...so maybe you can clear that up.

I'm not saying it's your fault that the amps were faulty, but....as I understand it the cheap driver that is in the mfw was your choice as a "matched" driver to the amp...and IMHO there is NO WAY that those cheap asss drivers match or can handle the amounts of power that the mfw15 amp (when working properly) can put out.

Maybe you can clear that up a bit?

I'm thinking i'll order a more beefy driver to try in my working MFW-15 just for fun.

Overkill in the audio world?.....No!