2. amps-preamps
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Why are my mosfet fuses blowing?

I have a Classe CA-200 Power Amplifier/200 watts per channel into 8 Ohms (side heat-sink version)which is driving a pair of Thiel CS2.3s with upgraded coaxial tweeter/midrange. Sound is very good. I listen at relatively high volumes and recently (over the last year) the amplifier is getting hot within 60 to 90 minutes of listening and the mosfet fuses (2AG 1/2 PT, 1/2 amp fast blow) have been blowing. Do I need a higher powered amplifier to listen at high volume? Should I look for a used CA-200 and use one to drive each speaker (700watts into 8 Ohms)? Thanks.
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Showing 3 responses by bcarr38

bcarr38's avatar
bcarr38 OP
9 posts
 
Thank you all for the input. I did contact Classe, and they thought it may be a short in the speakers. I am not highly tecnical but if any one knows of a way to confirm if there is a short, I would greatly appreciate it. Thank you for all the help!
bcarr38's avatar
bcarr38 OP
9 posts
 
Thank you all for the great input. The speakers sound excellent (until the fuses blow) so it may be a power issue. I do have another set of speakers (Tannoy Monitors)which I can try to see if the amp still gets hot. P.S. Thanks for the link to the Stereophile article!
bcarr38's avatar
bcarr38 OP
9 posts
 
Thank you Afc. I found a Stereophile article which seems to indicate that it is Class A/B (http://www.stereophile.com/solidpoweramps/297classe/) but I don't know how to verify. I will try the Tannoys and see what happens. Thanks!
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