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Found 3 results

  1. Hello, Not sure if I've posted this in the right forum possibly should be in the DIY section. I recently bought a second hand Rotel RA-12 to use as a pre-amp. The Rotel randomly relay clicks and drops sound for a split second which seems to become more and more frequent over a couple of hours of use. I am guessing it is heat related. It is also gets quite hot towards the back right of the amp. I removed the monoblocks I was using and used the Rotel as an integrated thinking maybe it doesn't like having no load even though the speaker switch is off. And that seemed to reduce the clicking considerably but then I didn't use it for as long so who knows. I have taken the lid off after letting it run for quite a while with no speakers connected and found 2 transistor heat sinks (Q905, 906) under the location where it was getting quite hot. The heat sinks are untouchable for more than a second, they're that hot. Is this irregularly hot? Does anyone know what would cause this? Thanks for any help.
  2. Hi, I've noticed recently that my old 1970s Sugden P128's get very hot, too hot to touch after about 4-5 hours of light use. I'm wondering if anyone has had similar experience with vintage amps and whether its a problem or not. And also whether anything of this age would have thermal protection? Regards, Byron.
  3. A search of the Head-Fi subforum gave no results for "commuter". So there might be room for a thread on tips and fails relevant to daily travel, whether by bus, train, tram, or executive jet. Not hot: Beats headphones. $20 of parts for a product that costs 10 times as much. Not value for money, nor is the reproduction accurate. Also they break. A lot. Tip - find something else. Anything else. Spend more than 3 minutes on your audition. White earbud headphones. A personal dislike is white earbud headphones because they leak sound really really badly. Today on the train I listened to the radio news through an iphone. The owner of the iphone was sitting in the seat one over from me, a complete stranger with an empty seat between us, and he had his white earbuds in. I heard the broadcast due to leakage. Hot: I didn't expect noise-cancelling headphones to work. They do, at reducing or, for some sound, eliminating noise below 1000 Hz. Such as the sound of air conditioner vents. I'm happy with my Sennheisers. Koss earbuds at the $150 mark. Excellent reproduction.
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