Nice to see such a reasoned and considerate response to the situation from Roger. Always good to see a company that continues to support their customers and their products especially when a problem arises. I'd like to see more manufacturers act in such a responsible manner.
Magtech amplifier over heating.
I bought a magtech amp a few years ago and have had to send it back twice in less than a year. The Motorola thermal track transistors are not reliable. When the thermal sensor goes the amp will become very hot even in idle. The left channel failed back at the beginning of 2015 and then the right channel failed in October.The amp still worked but the heat sinks were very hot even at Normal listening. Roger has no problem with fixing the amp. But how often is this going to happen. I have an Aragon amp that I've had for 30 years and only had it repaired once due to my negligence. Has anyone else have this problem.
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Yes, Ive had a pair of the monoblocks for some years now, serial #00352, that I run some Magneplanar 3.7 speakers with. I noticed a few weeks ago one side of one monoblock running extremely hot, initially thought it might be a ventilation issue but after eliminating most of the variables it still runs very hot. Even with no load, it warms up very fast from off state. The amp still works OK and no other indications of any problems. It sounds like I might have the same thermal track tranny problem. I hope my local support, Bill McCleans Hi Fi, can fix it. I'm in Australia. |
gmon5748 Knowing Bill I’m sure if you point him to this thread he will get the replacement of the unreliable thermal sens transistors done with new ones and instructions Roger will send him. From what I see, they could be the little ones mounted by themselves on the heat sink on either side near the back of the amp, and don’t look too hard to replace, maybe without a dismantle job if that's them. http://184.168.208.58/assets/images/image/AMPLIFICATION/Sanders%20Magtech/SandersMagtech-5(1).jpg Get both amps done, and I suggest you don’t use them till they’ve been fixed, as over heating in the longer term spells slow degradation for any amp. Cheers George |
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