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MFW-15 "Bad" Amp Return

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  • MFW-15 "Bad" Amp Return

    Had this e-mail exchange with Mark Joslin:

    From: Robert Kirk [mailto:[email protected]]
    Sent: Thursday, March 05, 2009 9:06 AM
    To: [email protected]
    Subject: Return of "bad" MFW-15 Amp



    I still have the bad amp out of one of my MFW-15. Do you guys want it back? Address to send it too? Thanks



    Bob kirk

    Do not resent growing old. Many are denied the privilege.


    rom: Mark Joslin / AV123 ([email protected])
    Sent: Thu 3/05/09 1:33 PM
    To: 'Robert Kirk' ([email protected])

    Hi,

    Actually, we received credit from our manufacturer, so you can just dispose of the “bad” amp. thanks



    Kindest regards,



    Mark Joslin

    Technical Care Manager

    (303) 543-7500 x 312 direct

    (720) 494-1751 fax

    [email protected]

    www.av123.com


    Anyone else throwing these bad amps away?

  • #2
    sounds like we can take a look and see if we can figure out what's wrong! lots and lots of pictures! :rock:

    Comment


    • #3
      Hmm, anyone want to dispose of one to me? I wouldn't mind :poke: at it.

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      • #4
        PM me your address and I'll send it off to you. Let us know what you find!

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        • #5
          Mark indicated to me on the phone a couple of days ago (mine died for the second time) that the primary cause of premature death for these is capacitor failure. The question I guess becomes "did anything else get fried when it went." I'm about to have two of them sitting here that I keep thinking I'll investigate further.
          Angel City Audio
          East Street Audio

          ACA, Melody, Onix, NuForce, KR Audio

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          • #6
            caps are usually easy to spot when they go bad. replacing a cap shouldn't be too difficult.

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            • #7
              Originally posted by soloz2
              caps are usually easy to spot when they go bad. replacing a cap shouldn't be too difficult.
              Mine was pretty easy to find. It was the only cap that was sitting alone on the floor inside the amp cavity. :)
              Blogging on audio, home theater and life in general here. My relationship with AV123 described here.

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              • #8
                Originally posted by woofersus
                Mark indicated to me on the phone a couple of days ago (mine died for the second time) that the primary cause of premature death for these is capacitor failure. The question I guess becomes "did anything else get fried when it went." I'm about to have two of them sitting here that I keep thinking I'll investigate further.
                I had another MFW-15 amp go out, a couple of days ago. Talked to Mark Joslin and I'm on the list for one of the new amps when they come in. Hopefully at the end ofarch.

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                • #9
                  Originally posted by dweekie
                  Hmm, anyone want to dispose of one to me? I wouldn't mind :poke: at it.
                  Dweekie, did you get the MFW-15 "bad" amp I sent you?

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                  • #10
                    Originally posted by woofersus
                    Mark indicated to me on the phone a couple of days ago (mine died for the second time) that the primary cause of premature death for these is capacitor failure. The question I guess becomes "did anything else get fried when it went." I'm about to have two of them sitting here that I keep thinking I'll investigate further.
                    Failing capacitor is the same reason I was given for the hum and standby thump with my x-sub amp.

                    Did the MFW amps come from the same manufacturer?

                    Comment


                    • #11
                      Originally posted by uw69
                      Dweekie, did you get the MFW-15 "bad" amp I sent you?
                      Yes, I got it. Sorry for not updating you on that. Ordering some new parts now; hopefully it'll come alive once again. So far, the power supply tests fine. Working through the amp board now.... I didn't see any failed capacitors. Anybody that's had one, do you remember what color it was?

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                      • #12
                        Any news??

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                        • #13
                          Originally posted by DavidJames
                          Mine was pretty easy to find. It was the only cap that was sitting alone on the floor inside the amp cavity. :)
                          By any chance, did you try to solder it back into the circuit board?....or was it otherwise damaged?

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                          • #14
                            Originally posted by JimP
                            Any news??
                            I Pm'ed (Dweekie) the same question either he elected not to respond or didn't get it:scratchchin:

                            Lance
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                            Whatever

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                            • #15
                              Ah, I got 2 PMs (not PMS) about the amp. I'm a bit slow with those. I need to replace the fets; also got some insulators to fit between the fets and the chassis since they weren't originally there. I'm making some slow progress...... None of the caps seem blown, but I feel like I should replace them with the reports that some of them have blown up .... hmmm....

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