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Recent content by stpeteshepherd

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    Klipsch Promedia 5.1's - Amp repair

    The solution I like the best may not be practical for many, but I can also provide a good alternative. 1) My preferred input cable uses Hosa double-shielded (copper braid) 20 gauge CMK microphone cable paired with Neutrik's REAN gold-plated plugs. Some sound cards may be too narrow for the...
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    Klipsch Promedia 5.1's - Amp repair

    Glad you found the cause. For the benefit of others who may read of the issue you reported: The factory input cables and the mechanical connection of the plugs to the sockets at the sound card and at the ProMedia amplifier are the weakest links. The input cables have very fine, fragile wires. I...
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    Klipsch Promedia 5.1's - Amp repair

    Hi, Yes, since 2020 I have been only using Noctua 92mm fans. They have a 150,000 hour mean time to failure (mttf) rating, which is 17 years of 24/7 use. The fans I originally used 20 years ago were ball bearing, but those are so noisy (audible outside the enclosure) that I eventually went to...
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    Have an old Klipsch 4.1 speaker system? Did it die? I bet you can fix it!

    There are three common causes for noise, including static, for the ProMedia 4.1, as well as some less-common causes. 1) A failing 50k potentiometer will cause noise, which will be noticeably affected by adjusting volume. This is common for both the main (4-gang) 50k potentiometer, as well as...
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    Hi, I apologize that I did not see your message, until now, many months later. If I can still be...

    Hi, I apologize that I did not see your message, until now, many months later. If I can still be of help in some way, please reach out to me. Perhaps email or text would be better: htkclk@juno.com or 952-393-5786 Henry
  6. S

    Hi, I apologize. I see that I did not seem to be getting notice, or seeing notice of some...

    Hi, I apologize. I see that I did not seem to be getting notice, or seeing notice of some messages here. I do not have GMX subs. I have not worked on them, but may be able to help. Do you think you could remove the amplifier panel from the sub? I would likely need to borrow a control pod to...
  7. S

    Hi, I apologize that I did not see your message until now. The capacitors you want to replace...

    Hi, I apologize that I did not see your message until now. The capacitors you want to replace are not in those photos. Here's a photo of the four to check. Hopefully I replaced all four. If I only replaced two, then I would suggest you replace the other two originals.
  8. S

    Klipsch Promedia 5.1's - Amp repair

    If anyone does decide to move on from their ProMedia 5.1, please let me know. There continues to be interest in the systems, since the consumer market the past decade has gone away from the power, clarity and compactness that Klipsch combined in the ProMedia 5.1. I can likely find a new owner...
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    Hi, I can help you with your ProMedia 5.1. I just have a busy day ahead, and may not be able to...

    Hi, I can help you with your ProMedia 5.1. I just have a busy day ahead, and may not be able to give any detailed answers until later in the weekend.
  10. S

    Hi, This is Henry, stpeteshepherd on ebay. You may reach me at stpeteshepherd@gmail.com. I...

    Hi, This is Henry, stpeteshepherd on ebay. You may reach me at stpeteshepherd@gmail.com. I have an older email address cited a couple of places on this forum, and I did not want to post my new gmail address in the chat, to confuse people who still reach me via juno.
  11. S

    Klipsch Promedia 5.1's - Amp repair

    Just to clarify: you have shared pictures of a 4.1 ProMedia (with purple and green input plugs), but are referring also to the 2.1 and 5.1. All three of these ProMedias are quite different, and the 2.1 itself has gone through more than three significant redesigns. It can be confusing. The 5.1...
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    Klipsch Promedia 5.1's - Amp repair

    Hi, The discoloration under the 2N5551 transistor, 22v zener and two resistors is normal. The heat has caused the transistor and zener diode to become heat-sensitive & intermittent eventually on quite a few of these, but still less than 10% of repairs I see. The 680 ohm and 5110 ohm resistors...
  13. S

    Klipsch Promedia 5.1's - Amp repair

    Hi, I've repaired the hiss on hundreds of ProMedia 5.1 amplifiers, and once properly repaired and upgraded, it can be solved. The noise could be from a number of places in the AC-DC converter board, or even (not the most likely) the BASH HC1011 board that you replaced on the digital converter...
  14. S

    Klipsch Promedia 5.1's - Amp repair

    I would not replace cables that are still working fine. However, if you ever do have issues with noise or loss of one or more channels, the first place to look would be the input cables. A bad cable, especially if it is intermittent, can cause many headaches trying to track down the source. The...
  15. S

    Klipsch Promedia 5.1's - Amp repair

    The Klipsch individual amplifier boards fail only very rarely (about one in 500 repairs), and then it is a single board that fails, not a pair. The input cables fail so frequently that I won't reuse them, and the static you describe is consistent with a failing cable or oxidized...
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