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Poll Results
 
 How many amps would you PURCHASE at this pricepoint
 1 amp ( I only need a little rumble) 57 60%
 2 amps ( I like to go boom) 29 30%
 3 amps ( I like my neigbors to hear me go boom) 5 5%
 4 amps ( I am a base head and can never get enough) 3 3%
Total votes: 94   Please or register an account to vote.


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Irishlord82

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Reply with quote  #81 

One of my two MFW-15's has developed a buzzing sound and after checking all the connections, seems to be the amplifier. I am interested in a new amp before I destroy this sucker and place it in the trash. My purchase was in May, 2008 so I think I got the "good" driver. How do I confirm this? Thanks.

Carp

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Posts: 3
Reply with quote  #82 
Thanks Mark and Kevin for working on this for all of us that feel taken.  I'm anxiously waiting for the new and improved "Right" amp availability.  Mine's been dead now for 2 months and missing the boom

Thanks again

nanok

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Reply with quote  #83 

Quote:
Originally Posted by Mark_Seaton
Quote:
Originally Posted by Murrel
I would think that if anything the UFW is harder to drive than the MFW driver as the UFW driver is very stiff excursion wise

Murrel


The suspension has little to do with how hard a speaker is to drive.  The impedance curve and the spectral content of the signal used matters much more.  From an amplifier's perspective, the UFW-12 is a very easy load to drive, especially between 25-50Hz.  With most of these types of amps, at high output the amps are happier as more of the power gets dissipated across the load and not the output devices.   It would be more useful to test in an MFW-15 box at moderate level as the small chamber is what likely highlighted this weakness in the amps.

There were a few sources of hum which had been noted over time.  One was related to the umbilical up to the control panel and its proximity/orientation to the power transformer (a few ways to reduce this).  Another was a matter of grounding and ground loop issues, and the third was only loosely documented, but seemed to be a progressive problem as the amp died and was likely related to some of the parts with poor tolerance combined with sensitivity to heat. 

I am still pursuing a few promising options from different suppliers to insure we'll have a solution sooner than later.

The highlighted portion seems to have just bitten me in the arse. I've been running mine for ~1 year, and all has been fine. I started notice a slight hum (not the typical ground loop sub hum) the other evening. It wasn't that lound and was easily browned out by the rest of the system. However, I didn't feel confortable leaving it plugged in with the problem if I wasn't going to be there, so I discconecyted it from the wall before I went to work. When I remembered it was unplugged last night, I plugged it in in front of my wife, and the hum was back, but even louder. Watching TV last night I came to these forums checking onthe upgrade, and found there are lots of people like me, and now AV123 is gone.
Perhaps I will get on the list for the upgrade, but might pull the trigger on this if it happens sooner than my number is called.
paw

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Posts: 44
Reply with quote  #84 
nanok

Contact Murrel. He's able to repair the bad components.
Moikey

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Reply with quote  #85 
I was just recently pointed to this as an option and am anxiously awaiting the final product. I have two MFW15s. I had AV123 replace one amp almost immediately after purchasing and now the other needs replacement. I am sure the first one that was replaced will die soon.  I am so glad there is a good economical option moving forward, thank you Seaton!  The turbo option is very tempting as well.  Maybe if there was a poor man's turbo
boober

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Posts: 67
Reply with quote  #86 
Apparently there is a poorman's on the horizon. Which is good because we're obviously not rich if we bought MFW's... Still patiently waiting for updates on this from Mark and Kevin.
jparkhur

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Posts: 7
Reply with quote  #87 
As i find my new v3 amps developing issues, i would like to wait and get two new replacement amps.  Q: could i just hook them to a triad 500 dsp and run them fine?  What is the ohm on the driver?  How long till we see amps from Motor City????
THanks
Timeless_Tech

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Posts: 12
Reply with quote  #88 
Quote:
Originally Posted by jparkhur
As i find my new v3 amps developing issues, i would like to wait and get two new replacement amps.  Q: could i just hook them to a triad 500 dsp and run them fine?  What is the ohm on the driver?  How long till we see amps from Motor City????
THanks


The v3 amps now, too? You have more than 1 it appears. Are they exhibiting the same symptoms? Please tell us more . . .
jparkhur

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Reply with quote  #89 
Morning,

I have two of the v3 amp versions.  Yes, the unusable controls at top.  I have tried everything.  I have removed all electronics, changed RCA's, moved outlets, used jumpers etc.  One of my subs has a constant hum when only plugged in to power, no rca attached.  The other has yet to have this issue, but i am hedging my bets.  If i have to fix one, i'll have to fix both to have similar sound.  I am currently using a ACI Meastro  XL that Mike Dzurko gave me and the two MFW 15's.  So I have no issues, i just want to replace the two amps with either drop ins, or and external 500 or 1000 watt amp to use with both drivers.  I am not sure the second is going to work due to ohm load.    Time line on amps???  

FYI:  I have taken amp apart and moved coil some, checked all connections too.  Nothing seems to work.
boober

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Posts: 67
Reply with quote  #90 
Out of boredom 1 day, I hooked up a Samson S1000 stereo amp to 1 of my MFW's and ran it like that for about an hour and it did fine. The Samson was giving it basically 500 watts at 4ohm. I didn't push it that hard out of fear, but it did work ok for as long as I had it that way. I'm hoping that maybe 1 of the options Kevin and Mark come up with is an amp that can be hooked up externally like my Samson 2 channel amp. I don't care either way if I use a plate amp. It's irrelevant to me, I'm just looking for the cheapest method which would be a good 2 channel amp. Since I have 4 MFW's, the CHEAPER the BETTER
sandbagger

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Reply with quote  #91 
Quote:
Originally Posted by boober
Out of boredom 1 day, I hooked up a Samson S1000 stereo amp to 1 of my MFW's and ran it like that for about an hour and it did fine. The Samson was giving it basically 500 watts at 4ohm. I didn't push it that hard out of fear, but it did work ok for as long as I had it that way. I'm hoping that maybe 1 of the options Kevin and Mark come up with is an amp that can be hooked up externally like my Samson 2 channel amp. I don't care either way if I use a plate amp. It's irrelevant to me, I'm just looking for the cheapest method which would be a good 2 channel amp. Since I have 4 MFW's, the CHEAPER the BETTER


I thought you were doing 4 Turbos??

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Kevin
Motor City Custom Audio
http://motorcitycustomaudio.com/
Worlok

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Posts: 1
Reply with quote  #92 
Put me down for 1.  I am in the same boat as many others who have posted.  Sent my amp in for repair at the end of July and never received a replacement or the original humming unit back.  Now I have an amp-less cabinet taking up floor space in my living room, hoping to find a way to bring it back to life.



Rod
boober

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Posts: 67
Reply with quote  #93 
Quote:
Originally Posted by sandbagger
Quote:
Originally Posted by boober
Out of boredom 1 day, I hooked up a Samson S1000 stereo amp to 1 of my MFW's and ran it like that for about an hour and it did fine. The Samson was giving it basically 500 watts at 4ohm. I didn't push it that hard out of fear, but it did work ok for as long as I had it that way. I'm hoping that maybe 1 of the options Kevin and Mark come up with is an amp that can be hooked up externally like my Samson 2 channel amp. I don't care either way if I use a plate amp. It's irrelevant to me, I'm just looking for the cheapest method which would be a good 2 channel amp. Since I have 4 MFW's, the CHEAPER the BETTER


I thought you were doing 4 Turbos??


I had been considering maybe doing 1 or 2 Turbo's. And maybe selling 2 of my MFW's to help pay for the 2. But then av123 went out of business, and no one seems to be having that much luck selling these things now for a halfway decent price. I dunno what the hell I'm gonna do, just waiting to see what you and Mark finally come up with before hopefully being able to make up my mind.
ASAL

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Reply with quote  #94 
You could count me in for one of these.  I'm on the current turbo list but this might be a little more economically sound as long as they become available.
synergytheory

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Posts: 2
Reply with quote  #95 
On my third MFW-15 amp that has blown. Count me in for a replacement also.
rfglock

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Reply with quote  #96 

any chance the new amp will have a balanced input?

sandbagger

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Reply with quote  #97 
As of right now that is a good question.

There is a balanced input on one of several options we are looking at.  I dont know if it will the amp we go with or not yet.

So to answer your question.... its a big MAYBE

Quote:
Originally Posted by rfglock

any chance the new amp will have a balanced input?


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Kevin
Motor City Custom Audio
http://motorcitycustomaudio.com/
rfglock

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Reply with quote  #98 
Thanks. Not a deal killer but would be nice
poormonkey

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Posts: 1
Reply with quote  #99 
Well, one of my MFW-15 amp's now has the hum again.  I already replaced it about a year ago via warranty and now the replacement one is going.

I can dream about the turbo upgrade, but right now it isn't an option for me.

The question I have is their anyone out there that can isolate and repair the amp?   I have the original one that went bad in my closet, and now I have the second bad one in the sub.   If anyone has any info on someone who is qualified to repair them, please let me know.

Thanks.....
boober

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Posts: 67
Reply with quote  #100 
Quote:
Originally Posted by poormonkey

The question I have is their anyone out there that can isolate and repair the amp?   I have the original one that went bad in my closet, and now I have the second bad one in the sub.   If anyone has any info on someone who is qualified to repair them, please let me know.

Thanks.....


http://av123info.us
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