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amp boards

  1. A

    MAC4100 channel imbalance and clipping light on meter

    Here is the deal. this Mac 4100 works great as a preamp but when used as an amp... one channel is weak. originally the left channel. Audio and Meters, weak meter also has red clipping light on. When I swap the amp boards the weak channel changes along with the meter reactions. So I assume it has...
    • Artopsy
    • Thread
    • 132188 132189 amp boards channel unbalanced mac4100 weak channel
    • Replies: 4
    • Forum: McIntosh Audio
  2. C

    Definitive Technology Mythos STS crapped out... worth repairing?

    Greetings... I dipped my toes into the world of higher end (?) audio eight years ago through a pair of Definitive Technology Mythos STS speakers. These speakers have integrated subwoofers and I loved the bass output and overall sound. But after dropping around $3000 CAD on them (at a time the...
    • chuckasaurus
    • Thread
    • amp boards def tech definitive technology failure
    • Replies: 7
    • Forum: Speakers
  3. N

    New and in need of help

    Hey all! Electrician trying hobby with audio repair. Couple vintage components I'll probably post about, but today is an Integra DTR 70.4 I bought as not working on eBay. No standby power. 2 relays have 120v at the line contact, nothing at the load. Looks like the coil shorted (supposed to be...
  4. MBuras

    Basket Case KA-7002 need some guidance

    I bought it cheap knowing it didn't have sound output. Didn't know until I got it that there were literally parts missing on the amp card and definite signs of being worked on. I've subbed in proper replacements where needed, making sure to check, recheck orientation and pinouts as needed. It...
  5. MBuras

    Kenwood KA-7002 amp board picture request

    Good morning fellow AK'ers. It's a long shot but hoping someone out there might have an early model KA-7002 they could post close up pics of the amp board and maybe the relay wiring for bonus points. I have one that someone has been into. Some parts were missing and others have been changed but...
  6. T

    Diagnosing problem to repair vintage amp

    I hope I'm posting this in the right forum. I recently acquired a nice stack of Nikko separates (Alpha II, Beta II, Gamma I) and the amp has an issue. I am hoping to narrow down the likely culprit before just replacing all the capacitors. I tested the amp by connecting it pc > preamp > amp >...
    • Tinsleysboy
    • Thread
    • amp boards nikko repair help
    • Replies: 7
    • Forum: DIY
  7. S

    DBX-BX3 - Help!

    I have a DBX-BX3 that seems to be in melt down mode! Background: I bought amp awhile back and had it sitting in the pile project. Decided to dust it off and clean it up. It had what seemed to be classic issues with dirty controls and dirty relays making use somewhat intermittent and...
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