mission cyrus II destroyed my woofer - diyAudio
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Old 24th May 2004, 03:23 PM   #1
roebas is offline roebas  Belgium
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Join Date: Jan 2004
Location: Gent
Default mission cyrus II destroyed my woofer

Hello, I recently got a non-working mission cyrus II from a friend. I am repairing mainly tube amplifiers (just as a hobby), but I could not throw away this amp. So last weekend I opened the amplifier, and saw that one of the fuses was blown (the most outside one). So I replaced the fuse with a F4A fuse. I connected my test speaker to the right channel and switched on the cyrusII. But it suddenly destroyed the woofer of my test speaker (a cheap 3way speaker). The midrange and tweeter acted normal. So probably there is something wrong with one of the output transistors? Can you advise me some things to check?
Kind regards,

Roeland De Vriese
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Old 24th May 2004, 03:49 PM   #2
Did it Himself
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Join Date: Nov 2003
Location: Gloucestershire, England, UK
The output transistors have blown. You should have checked for DC at the output before connecting anything to it!

See my reply to "Why are these fuses blowing" thread started by Darin P-B. Search the forum next time
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