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NEW MFW-15 amps (May 2010) *pics* - Page 83

post #2461 of 2590
Quote:
Originally Posted by JimWilson View Post

I might be able to give you some insight in the not too distant future.
I have no doubt that any official review of the Turbo will be nothing but high marks all around. I also hope it also convinces any "fence sitters" out there to make the investment, as this Seaton/MCCA design really kicks some butt. I have nothing but praise and thanks for Mark and Kevin for coming to the rescue, when us MFW owners experienced the premature amp death syndrome...

FWIW, I'll be reintegrating my v1 Turbo back into my media room today, and hope to get it dialed in to a fairly flat curve with the Velo SMS-1. I'd be happy to post up some before/after graphs if anyone is interested. I did post some graphs for my stock MFW a few years ago, over at the Seaton/MCCA forum IIRC.
post #2462 of 2590
Quote:
Originally Posted by mak99 View Post

FWIW, I'll be reintegrating my v1 Turbo back into my media room today, and hope to get it dialed in to a fairly flat curve with the Velo SMS-1. I'd be happy to post up some before/after graphs if anyone is interested. I did post some graphs for my stock MFW a few years ago, over at the Seaton/MCCA forum IIRC.

I'd love to see your graphs.
post #2463 of 2590
hi guys,
i'm new to the forums. i bought some av123 speakers back in 2009 i believe. my two mfw-15's did me right for about six months before one amp blew. i got a replacement free of charge at the time. a year later the other one started making the humming noise more or less constantly, and then the first one that had been "fixed" started doing it too. in the meantime my man cave and speakers were closeted to make room for one kid after another. now i'm ready to address these monsters. i'll admit i haven't read through 83 pages of the thread but can anyone tell me briefly if there is a quick and painless fix? they are otherwise in beautiful condition. if there is no easy fix and someone out there thinks they can make something of them, you can have them for pretty much just the shipping cost.

appreciate any comments!
post #2464 of 2590
Quote:
Originally Posted by spartandmd View Post

hi guys,
i'm new to the forums. i bought some av123 speakers back in 2009 i believe. my two mfw-15's did me right for about six months before one amp blew. i got a replacement free of charge at the time. a year later the other one started making the humming noise more or less constantly, and then the first one that had been "fixed" started doing it too. in the meantime my man cave and speakers were closeted to make room for one kid after another. now i'm ready to address these monsters. i'll admit i haven't read through 83 pages of the thread but can anyone tell me briefly if there is a quick and painless fix? they are otherwise in beautiful condition. if there is no easy fix and someone out there thinks they can make something of them, you can have them for pretty much just the shipping cost.

appreciate any comments!

There are a few fixes and the cheapest is replacing the capacitors as discussed on this forum. It's fairly simple and most have reported good luck for a while after replacing them. I'm afraid the fix options get quite a bit more expensive from there forward though. If you decide to part with them I want to call dibs on your offer but I think you should search the forum for the posts that describe how to replace the capacitors and give it a whirl for a few bucks. Could get you back up and running for several months or more.
post #2465 of 2590
There was a guy named Murrel Gray who was deeply involved in repairs/upgrades for the amps, but he's no longer able to assist as he once did (due to personal reasons he's pretty much stepped away from all things HT related, even shuttering his own company Simple Sound Audio). As such, all the "contact Murrel" posts you can safely ignore.

When you do search for repairs and fixes one you'll undoubtedly come across is the Turbo upgrade supplied by Seaton Sound. Since you still like the cabinets it's perhaps the best alternative for you.
post #2466 of 2590
Thanks guys. I did read about three pages deep regarding capacitors and such. I'll give it a whirl once I find the free time. The turbo upgrade is simply outside my budget for now. If I can't get them running with my limited DIY time/skill, I'd rather see them in a new home with someone who can. Jeremy you'll hear from me if that's the case.
post #2467 of 2590
So I have a pair of MFW-15s up front and three Cambridge Soundworks PSW-1s (sealed 12" woofer) behind our seats. One of the MFWs is running on a v3 amp and the other a third time cap fixed v2 amp. I am considering a Turbo to replace the v2 amp and driver but here is my concern:

I already have plenty of bass. Its already about 3-4 db hot from calibrated levels using Multi XT32 and there is plenty of room to go with no distortion from any of the subs. I wouldnt necessarily be getting the upgrade to add bass. If I wanted more bass, I could simply increase the sub levels in my Processor.

What advantages would the Turbo upgrade add to my setup?

More generally speaking, I understand that multiple subs can provide a more even response but there must come a point where the advantage will only be seen when pushing the subs to their limits which rarely happens during normal movie watching.




Edited by FoSheezy - 5/7/13 at 4:27pm
post #2468 of 2590
Quote:
Originally Posted by spartandmd View Post

Thanks guys. I did read about three pages deep regarding capacitors and such. I'll give it a whirl once I find the free time. The turbo upgrade is simply outside my budget for now. If I can't get them running with my limited DIY time/skill, I'd rather see them in a new home with someone who can. Jeremy you'll hear from me if that's the case.

Sounds good. Just PM me if anything changes.
post #2469 of 2590
Quote:
Originally Posted by FoSheezy View Post

What advantages would the Turbo upgrade add to my setup?

Given your situation the primary advantage would probably be getting far better quality bass, with more precision and accuracy. You would more than likely be in the position to get rid of the other 3 subs and just use the pair of Turbo's, without losing any of the total output you currently have.
post #2470 of 2590
Just wanted to comment to let everyone know that the Crown XLS 1000 or 1500 work great as a replacement amp for when your V1/V2 eventually dies (if they haven't already). If you have more than one MFW-15, I would suggest getting the Crown XLS 1500 as it drives 525 watts into 2 channels at 4 ohms. Pair it with a Behringer MIC 2200 to protect the driver with a high pass filter below 19 hz and to do any necessary EQ for your room.
post #2471 of 2590
Quote:
Originally Posted by micah3sixty View Post

Just wanted to comment to let everyone know that the Crown XLS 1000 or 1500 work great as a replacement amp for when your V1/V2 eventually dies (if they haven't already). If you have more than one MFW-15, I would suggest getting the Crown XLS 1500 as it drives 525 watts into 2 channels at 4 ohms. Pair it with a Behringer MIC 2200 to protect the driver with a high pass filter below 19 hz and to do any necessary EQ for your room.

In your opinion, how does the Crown XLS 1500 compare to the Behringer NU3000DSP? I have two of these so if I can get a single amp for both to save some money then even better.
post #2472 of 2590
I dont see any advantage with that crown and that external EQ over the Behringer. Generally speaking crown amps are better built but in this case for sub duty the nu3000dsp with internal dsp is a better choice imo. Cheaper and simpler. The more links in the signal chain the more complex gain structures get, more sources for hum, more cabling, and more boxes.

The inukes are solid performers and the dsp software is pretty intuitive.

Both amps put down a little more power than the MFW really needs so be nice with the power and either should work fine.
post #2473 of 2590
Quote:
Originally Posted by jeremyhelling View Post

In your opinion, how does the Crown XLS 1500 compare to the Behringer NU3000DSP? I have two of these so if I can get a single amp for both to save some money then even better.

I only own the Crown XLS 1500 and so can only compare the specs. Seems both should be capable of running two MFW-15 drivers each, one from each channel. The built in DSP on the Berhinger sounds like a nice feature as well. I don't have a MIC 2200 at this time and my MFW-15 still sounds great but plan to add one later primarily for the high pass filter and because I can use the amp and behringer for a future DIY upgrade if I ever blow the MFW-15 driver or get tired of it. Go with whatever fits your budget and needs best. One other observation, the input/output options on the Behringer NU3000DSP aren't as flexible as it only takes speakon connectors for both ins/outs.
post #2474 of 2590
Quote:
Originally Posted by micah3sixty View Post

Quote:
Originally Posted by jeremyhelling View Post

In your opinion, how does the Crown XLS 1500 compare to the Behringer NU3000DSP? I have two of these so if I can get a single amp for both to save some money then even better.

I only own the Crown XLS 1500 and so can only compare the specs. Seems both should be capable of running two MFW-15 drivers each, one from each channel. The built in DSP on the Berhinger sounds like a nice feature as well. I don't have a MIC 2200 at this time and my MFW-15 still sounds great but plan to add one later primarily for the high pass filter and because I can use the amp and behringer for a future DIY upgrade if I ever blow the MFW-15 driver or get tired of it. Go with whatever fits your budget and needs best. One other observation, the input/output options on the Behringer NU3000DSP aren't as flexible as it only takes speakon connectors for both ins/outs.

Good point about the speakon connectors. I saw the back panel & was wondering where the RCA & speaker inputs/outputs are. What will need to be done to make that work? Currently RCA feeds the amps from the receiver which then feed the subs via speaker wire. I'm not very versed on speakon connections other then a quick search showed me what they look like & they have 4 leads instead of two. I'm not sure why anyone would make a sub amp with those given the simplicity of subs & their amps.
post #2475 of 2590
Quote:
Originally Posted by jeremyhelling View Post

Good point about the speakon connectors. I saw the back panel & was wondering where the RCA & speaker inputs/outputs are. What will need to be done to make that work? Currently RCA feeds the amps from the receiver which then feed the subs via speaker wire. I'm not very versed on speakon connections other then a quick search showed me what they look like & they have 4 leads instead of two. I'm not sure why anyone would make a sub amp with those given the simplicity of subs & their amps.

You'd have to get Speakon to RCA adapters for the input(s) and then a Speakon to Banana or bear wire for the sub lead. I don't know whether the Behringer can use unbalanced inputs, but I assume it can, though may benefit from a line driver like the Crown XLS lines do, but which I'm not currently using but have to turn the gain up nearly 3/4ths for a balanced level.
post #2476 of 2590
Quote:
Originally Posted by micah3sixty View Post

You'd have to get Speakon to RCA adapters for the input(s) and then a Speakon to Banana or bear wire for the sub lead. I don't know whether the Behringer can use unbalanced inputs, but I assume it can, though may benefit from a line driver like the Crown XLS lines do, but which I'm not currently using but have to turn the gain up nearly 3/4ths for a balanced level.

This might be a deal breaker on this amp then because I don't like the idea of proprietary connectors for both input and output. Now, maybe this is the norm for high-end stuff but I don't see a $399 amp as 'high-end' and not one of the five A/V receivers I own have speakon connectors for the sub output. I searched and I can't find a Speakon to RCA adapter nor can I find a Speakon to bare wire adapter so that $50 savings may not be worth it unless I'm just aware of something obvious when it comes to installing this amp.
post #2477 of 2590
^The inputs on the behringer are balanced. You need an unbalanced to balanced cable for that. A couple bucks at monoprice.

The outputs are speakon. speakon plugs are a few bucks and screw right to your speaker wire easy peasy. Just get the two pole ones.

If any of this sounds too complex you prob shouldnt get a pro amp, much less try outboard EQ with a pro amp.
post #2478 of 2590
I looked at the Behringer again and the inputs can accept 1/4" TRS or XLR connects. You can probably find RCA adapters to either of those.
post #2479 of 2590
Quote:
Originally Posted by NicksHitachi View Post

^The inputs on the behringer are balanced. You need an unbalanced to balanced cable for that. A couple bucks at monoprice.

The outputs are speakon. speakon plugs are a few bucks and screw right to your speaker wire easy peasy. Just get the two pole ones.

If any of this sounds too complex you prob shouldnt get a pro amp, much less try outboard EQ with a pro amp.

No, it doesn't sound complex... if I can find all these adapters. I searched Monoprice as well as Amazon and Google in general looking for these adapters before I posted that I couldn't find them. I even searched Monoprice for 'unbalanced to balanced cable' just now and came up blank. If you can post direct links to the items you're talking about to get me started on my research I would appreciate it. Saying something may be to complex for me when I can't even find adapters/cables isn't very fair. I'm not a moron but I can't make adapters out of thin air to connect everything to my existing equipment and I've searched and am coming up blank.

Edit: After doing some Google searching I found another forum that was discussing this and someone addressed the parts needed specifically. For the input they suggested getting an XLR to RCA male adapter from Monoprice. Easy enough. They then suggested getting a 2-pole Speakon connecter from PE for the output. "On the inside of the Speakon end, you have two metal inserts with a screw on the outside of the insert to tighten the cable. The inserts are labled with a 1+ and 1-. Red to the 1+, black to the 1-. Insert your Red and Black wire, tighten the screws down and done." Seems simple enough but means I will have to buy more parts to make this work which eats into that $50 savings.
Edited by jeremyhelling - 5/14/13 at 8:49am
post #2480 of 2590
Search Amazon on the following: XLR 3 Pin Male To RCA Male Cable
post #2481 of 2590
Quote:
Originally Posted by jeremyhelling View Post

Quote:
Originally Posted by NicksHitachi View Post

^The inputs on the behringer are balanced. You need an unbalanced to balanced cable for that. A couple bucks at monoprice.

The outputs are speakon. speakon plugs are a few bucks and screw right to your speaker wire easy peasy. Just get the two pole ones.

If any of this sounds too complex you prob shouldnt get a pro amp, much less try outboard EQ with a pro amp.

No, it doesn't sound complex... if I can find all these adapters. I searched Monoprice as well as Amazon and Google in general looking for these adapters before I posted that I couldn't find them. I even searched Monoprice for 'unbalanced to balanced cable' just now and came up blank. If you can post direct links to the items you're talking about to get me started on my research I would appreciate it. Saying something may be to complex for me when I can't even find adapters/cables isn't very fair. I'm not a moron but I can't make adapters out of thin air to connect everything to my existing equipment and I've searched and am coming up blank.

Edit: After doing some Google searching I found another forum that was discussing this and someone addressed the parts needed specifically. For the input they suggested getting an XLR to RCA male adapter from Monoprice. Easy enough. They then suggested getting a 2-pole Speakon connecter from PE for the output. "On the inside of the Speakon end, you have two metal inserts with a screw on the outside of the insert to tighten the cable. The inserts are labled with a 1+ and 1-. Red to the 1+, black to the 1-. Insert your Red and Black wire, tighten the screws down and done." Seems simple enough but means I will have to buy more parts to make this work which eats into that $50 savings.

I wasnt trying to insult you. What I mean is using pro amps is not plug and play. Even after you have all the right hardware setup is not plug and play like home consumer equipment. There will be other hurdles and the info is out there you just gotta spend some time finding it and making it work. You sounded reluctant so I thought I'd warn ya thats all.

Yes, the cabling you linked looks fine.

IDK what $50 savings your referrring to? Even IF you get the crown you will have to buy an external DSP and associated cabling. Its highly unwise to run a sub tuned to 19Hz without a highpass. If it were tuned considerably lower you might get away without it but its not. Even IF you don't kill the driver it will sound like crap. Theres just too much content in the 10-20Hz band not fo filter it out.
post #2482 of 2590
I have 2 MFW-15's,...One works fine, the 2nd Hums along...Before I put solder to joint
I'm looking for some guidance.....

There was a fellow member whose MFWs died like so many of ours... I only wish I remembered his name. Never the less, he took it upon himself to make the repairs many of us ( not me yet) performed to bring life back their MFW-15 ( without HUMS).

He then went on to try different Values of CAPS and other Components to see the effect and his results (according to him) were quite acceptable and to the best of my recollection is still operating. He kept us members informed as he tried various combination of caps and other components.

I lost contact with that Fellow and his posts..... He appeared to have a grasp of electronics which led him to try various combinations of CAPS etc.

Does anyone recall reading any of his posts? Or know his member name ? ? ?

Can any of you MFW junkies ( like me ) offer me trail to him?

Almost Desperate in Colorado ! ! !confused.gif

Thanks for any help you can offer....

p.s. FYI, No its not "MORRELL:, though I wish it were.
post #2483 of 2590
daveds50 repairs MFW-15 amps.
post #2484 of 2590
Ginovino just go to this post. http://www.avsforum.com/t/1250559/new-mfw-15-amps-may-2010-pics/2160. It's what you are looking for.
post #2485 of 2590
As Murrell can always be counted on to get the job done right, Provide correct information and never misguide you with bloviated information or just plain BS.....

Before I forge ahead... I again test my 2nd MFW-15 to make sure its operating without hum... Then put it aside ( for a rainy day). And tyr the changes suggested by our talented member.

As I progress, I hope to share my efforts (success ?)

Thanks once again Murrell!smile.gif
post #2486 of 2590
Good luck Ginovino! And please remember have a bit of fun hell it is just a subwoofer! And thank you for the kind words!

Murrel
post #2487 of 2590
So one of my MF-15 amps quit about a year ago and I purchased one from a forum member. (Thanks). Now tonight, my other MF-15 amp quit. Ughhh. What's my options. I have an amp from my last blown 15, now I have another. Can they both be repaired or do I just buy an SVS STA-800 to run them both? https://www.svsound.com/outlet-specials?page=shop.product_details&flypage=flypage.tpl&product_id=191&category_id=5#.UbfcRKa9LCQ. Any sugestions would be awesome. I have a SVS PB-13 and a PC-13 Ultra, but I'm used to having the two 15's also.
post #2488 of 2590
Quote:
Originally Posted by travis-g View Post

So one of my MF-15 amps quit about a year ago and I purchased one from a forum member. (Thanks). Now tonight, my other MF-15 amp quit. Ughhh. What's my options. I have an amp from my last blown 15, now I have another. Can they both be repaired or do I just buy an SVS STA-800 to run them both?

What about the Turbo upgrade?
post #2489 of 2590
I thought about that, but the price is a little steep. I think shipped its about 850.00? If I go with the stand alone amp it would run both subs for 750.00, because the other MFW-15 with the replaced amp is bound to fail eventually, and 2 turbo kits would be 1700.00 I think. It is something to think about though. Hmmm.
post #2490 of 2590
Quote:
Originally Posted by travis-g View Post

I thought about that, but the price is a little steep.

If you like the MFW cabinets you currently have it might not be as bad a deal as you think, value wise, when compared to other subwoofers in it's price class. It's a very impressive driver, to say the least...







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