NEW MFW-15 amps (May 2010) *pics* - Page 74

I wouldnt be so sure about that....

That to me is so silly. Some people just can't help but mention that the v2 has more output than the v3. But all you have to do is just turn the gain up a bit higher on the v3 to match the output of the v2!!!

agreed!

So when can I send you mine!

[quote=superbabyboy1984;21788287]Sorry about my English.

Any chance you could post links to the parts so I can buy them? Thanks!

Superbadboy1984 seems to have a pretty good grasp of the issue. Any comments Murrel or Sandbagger?

All he's doing is adding capacitance to the power supply. I should help theoretically, but power supply capacitance is the least of the V2 amps problems. It might help high power stablility and SQ but thats about it....

It looks like a interesting fix. Other than that I can't comment as I don't own a MFW or amp any more. Wouldn't hurt to try it. If you blow it up you could always run a external DSP amp.

Nick is also correct. Just fixes one of the problems.

Murrel

[quote=USlivingCanuck;21876619]
Until today, Im pretty sure that adding capacitors will solve the hump noise completely no matter how loud you turn the volume knob.Somehome the cheap original capacitors were not able to do their job which is smooth out the DC voltage(may be bad quality or the value of capacitor is too small).Adding capacitors also will make the output of MFW15 at high volume more stable.You can hear the big difference between before and after adding capacitors.

Hey Kevin. are you not doing the 'turbo' kits anymore? it was quite impressive...albeit expensive..but very impressive. if you have a Dayton Sa1000 lying around I'd buy it off ya. :-)

[quote=superbabyboy1984;21882152]
Got any pics of where you tied into the power supply board on the bottom?

[quote=NicksHitachi;21882767]
Here you go

[quote=USlivingCanuck;21876619]
I bought 4 3300uf 100v capacitors for mine but I think you should go for bigger value capacitors such as 4700uf or 6800uf(bigger is better).You can go with even number 4,6 or 8 capacitors(more capacitors is better).
http://search.digikey.com/us/en/prod...6110-ND/132316

The output capacitor I used to replace the one on audio board is 3.3uf 400v Jantsen audio grade capacitor.
http://www.parts-express.com/pe/show...number=027-920

I removed the foam in this hole and put two big straws into it .By doing that,the heat will not be trapped in the sealed cabinet anymore, which will help reducing the temperature in the amp's cabinet.

Not sure this is a good idea.......

Kind of like adding a little itty bitty additional port
Its got to whistle pretty good

Still trying to do Turbos, just got the new driver from the new supplier, gave up on AE, as he doesn't want the business doing AV drivers.

Had a few minutes with it last night and so far am very impressed.

Sorry dont have any amps laying around, although if you need one let me know and I can get an extra as I need to make an order this week.

I dont know how this can be considered a additional port while the amp's plate is still be sealed in the cambinet.??.There is only one way for the air go in and no way out while the sub is playing.

The original foam did not really seal the hole completely.What I saw it really does was secure wires to prevent vibration between the wires and the tube.

FYI ive sealed my upper and lower "pipes" proper a leaky sub sounds just that.......

I wouldnt count on the plate amp being air tight..... Yes theres a foam seal, but all those through holes and the line level inputs are not.

Assuming the amp were sealed youd be effectively increasing the cab volume and therefore changing the tuning of the cabinet.

Having said all that there would not be enough cooling from the warm air diffusing through those small straws to be significant. Since its a closed system diffusion would be the only air transfer through those tubes.

Just not convinced the tradeoff(s) are worth it in this case IMO.

Thats the best news ive heard in a while on the turbo, Good Luck!

And, ill be keeping my eyes out for monkeys......

got it. I forgot about the the cab volume will be increased when I did that.

Ok MFW owners......I had two plates left to build V3 amps with. I spent hours searching through the stuff QSC had to find enough parts for them. We were able to build the last two over the weekend. So the very last two V3 amps are up on my web site if anyone is interested.

I am still available to the MFW owners and will help as much as I can.



Murrel

Sorry these are now sold

Murrel

That was quick!

[quote=sandbagger;21884730]Still trying to do Turbos, just got the new driver from the new supplier, gave up on AE, as he doesn't want the business doing AV drivers. QUOTE]


Kevin,

What is this supposed to mean? AV's been out of business for quite some time now and a lot of customers were screwed when this happened. Fortunately for some, you folks and these forums have been of some help. But not for everyone. Why would AE care where the drivers go? They're not going to AV, they're going to regular schmucks like me, who've been waiting for an awefully long time for a resolution to a not so good audio investment we made in our subs some time ago.

I've still got 4 MFWs and I'm still waiting for your turbo solutions. I hope you can help us soon.

Murrel, does this mean there will no longer be any V3 or other amps for people who need replacements?

Chu Gai,

No more V3 amps.......as far as amps from other sources I really do not believe that anyone is working on a replacement.



Have a good day
Murrel

[quote=patmacav;21896951]
Hi patmacav,

What we have here is over-assumption on acronyms.

Kevin's reference to "AV drivers" was in no way pointing to AV123. Kevin was referring to the driver Acoustic Elegance has produced called the AV-15. The original Turbo woofers were based on the same size voice coil and shared many parts with the AV-15 drivers. Acoustic Elegance has had to shelf the driver due to inconsistent and sometimes malfunctioning parts supply and is focusing on its paper cone Lambda series drivers for the time being. I am Acoustic Elegance's largest customer and continue to receive woofers based on other models.

Less than 2 weeks ago I received a woofer sample of a 15" woofer customized to my specification for the MFW-15 which both I and Kevin have done a good deal of testing with and thus far find this to be a great solution. There are a few custom parts involved in the production which have lead times, and we won't be making any projections on availability until a first test batch of a couple doze drivers are on their way to us. Once those are received and confirmed to work as the sample, we will push the copy button and have many available to meet the interest.

For those who just need an amplifier, the capacitor fix murrel has posted has been workable for most, and it appears there will be a few external amplifiers both pro and consumer oriented which can nicely drive 1-2 original MFW-15 cabinets, and Kevin has the block off plates with terminals to make the connection for an external amplifier easy, or you can re-wire the binding posts on the original amplifier (disconnecting from the internal amplifier).

Hi Mark,

Sorry about the over-assumption Mark, that's why I asked for clarification. And I'm very happy to know that you are still working on a turbo solution. I'll be even happier if I still have the cash to do the mod when it becomes available. Gotta spring for a new roof and repair some rotting window trim this month. There go the turbos for a while for me. Good thing they're not ready just yet.


I have two MFWs in my HT, they've both had the ground loop hum forever. I just live with the hum, which goes away if I disconnect my satellite receiver. Had to swap out the original amp in one unit that went south right away with a replacement from AV123. As long as they're still working, I see no reason to take them apart until it's time to do the turbo mod. I also have an MFW in my LR and one in my BR system. Never heard a hum from either of those units.

Good to know things are moving in the right direction with the turbo solution.
Thanks for the update and the clarification.

[quote=Mark Seaton;21897963]
Hey Mark, I would love to know when this comes out as I have a crackling noise coming from my amp that seems to come and go. But I would also like a driver that doesn't bottom out as easy also. Any ideas on the price range?