NEW MFW-15 amps (May 2010) *pics* - Page 92 - AVS Forum | Home Theater Discussions And Reviews
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post #2731 of 2738 Old 05-16-2016, 09:32 AM
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Quote:
Originally Posted by musicmaniac View Post
Ok, finally got a chance to work on this and of course I'm having a problem on a relatively easy procedure. Can someone tell me how to take the big clips off the board? I got the two small clips easily but I can't seem to get the two bigger clips to cooperate. Also, I'm assuming the board should be removed from the panel correct? Any other tips would be appreciated as I'm a novice for the most part at this.

I used a third hand to hold the board vertically. I melted the solder and used a solder sucker to get what I could on both legs, then would melt one side and carefully pull one out as far as it would go, then go to the other leg, until it was out. Used the same method for replacing the cap...long leg first, then short...back and forth.
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post #2732 of 2738 Old 06-20-2016, 08:27 PM
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Glad to see this thread still breathing some life! I'm still enjoying my v1 Turbo Kit that I got back in Mar 2011. My friends are constantly amazed at how much their seats vibrate during some good LFE scenes. This past weekend saw a double-feature of Deadpool and Pacific Rim...yep, the house was definitely rockin'!

Kevin, I might have to peruse the Seaton website about adding a second MFW to my system...
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post #2733 of 2738 Old 07-24-2016, 04:18 AM
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Friday we finally got my Theater back up and running. I upgraded both of my MFW-15's using Mark Seaton's kits.

I am blown away. even at very low volumes you feel the rumble. I am still working out how to use REW to measure my room but I am very confident that I have lows well below 20hz.

The subs are also very musical. When I did the upgrades I plugged an ipod into them to make sure they were working and you could hear decent rhythm.

At about $800 each including shipping this was one of the best values of my room upgrades. Mark claimed a 50% increase (as I recall) in performance. I won't lie, I was skeptical. You can believe it. I think the performance upgrade is closer to 100%.
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post #2734 of 2738 Old 08-28-2016, 09:39 AM
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Originally Posted by murrel View Post
Most of the ones that I have done have not hummed again....although a hum can happen on the V1 amps that has nothing to do with the power supply board. The hum fix is cheap and for most of the folks out there worked and is still working today....Good Luck!

Nice to see that there is a drop in replacement now! Shows how long I have been away!


Murrel
I guess I'm the unlucky one - mine started to hum again after only 5 weeks.
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post #2735 of 2738 Old 08-28-2016, 09:50 AM
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Originally Posted by datguy85 View Post
Definitely replace all 4. I tried swapping out only the swollen ones and ended up having to do all 4. There were a couple 1uF ceramic caps that were blown in 2 of the amps that I had to replace, and a surface mounted cap or something that I had to redo. Easy fix as others have said and getting rid of that humming is so satisfying. Good Luck!
Hi

I replaced all four, plus the fried disc, and five weeks later it hums again. Murrel mentioned that may be the output transistors need to be replaced. What other components may cause the hum?
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post #2736 of 2738 Old 08-28-2016, 09:54 AM
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I have duals, and it is 100% worth it!!
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post #2737 of 2738 Old 08-28-2016, 10:12 AM
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INUKE DSP 1000 vs SEATON

I was using my pair of the MFW-15s mostly for music, I'd say about 80%, because I found them to be very musical. One has a V3 amp, I think (it has a toroidal trans and says "version A4" or something like that on the board). The other has an old humming amp. I replaced the caps as per Murrel's instructions, but five weeks later hum is back. I would like to replace the amp altogether. One option is the SEATON way (expensive, but apparently very good), the other - Behringer DSP 1000 (cheap: they are on sale now at Sweetwater for $149.99) Question is: will Behringer sound as musical, or will just give slam - bam? I had some Behringer gear in the past and was not too impressed.
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post #2738 of 2738 Old 08-29-2016, 05:40 AM
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V2 hum

This is a trace of my "new" hum. A very strange waveform, imho...
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