paulo m
Well-known member
As usual, I left my system playing relatively loud when I went out this past Sunday, to continue the break-in process of my Vantages (got them some 3 months ago). I made different CDs with sounds in various regions of the spectrum to exercise either the woofer, the panel or both. My last CD has a continuous 15 kHz sine tone with some minor and slow modulation of a few Hz and some harmonics for variety. I have left this CD playing on some three occasions now.
On that fateful day, I left the system going with that CD at a volume squarely in the middle. After we came back, some two hours later, no sound was coming out: The power supply fuse had blown. No matter, just replace it and off we go for a nice relaxing listening session, I thought. Replace, switch the amp on, nothing. The new fuse also blew. Hmmm was it defective? Let's try another one. Blown again.
I think the low impedance of the speakers at such a high frequency coupled with the relatively loud volume (I get 90 dB SPL with the volume at about a third, using typical CDs, even though some play at a somewhat lower intensity) over the extended period just fried some internal component in my amp. I opened it and gave a thorough look, nothing seemed burnt or melted, however, although on the previous two occasions it ran considerably hot, which I figured is normal for an amp in class A operation.
I am taking it this Saturday to the shop. I am coming out with a loaner if repairs are not obvious or trivial, so at least then I will be able to listen to some music again.
Oh well. Maybe I should start looking for an amp that handles 2 ohm and lower loads more nimbly.
//p
On that fateful day, I left the system going with that CD at a volume squarely in the middle. After we came back, some two hours later, no sound was coming out: The power supply fuse had blown. No matter, just replace it and off we go for a nice relaxing listening session, I thought. Replace, switch the amp on, nothing. The new fuse also blew. Hmmm was it defective? Let's try another one. Blown again.
I think the low impedance of the speakers at such a high frequency coupled with the relatively loud volume (I get 90 dB SPL with the volume at about a third, using typical CDs, even though some play at a somewhat lower intensity) over the extended period just fried some internal component in my amp. I opened it and gave a thorough look, nothing seemed burnt or melted, however, although on the previous two occasions it ran considerably hot, which I figured is normal for an amp in class A operation.
I am taking it this Saturday to the shop. I am coming out with a loaner if repairs are not obvious or trivial, so at least then I will be able to listen to some music again.
Oh well. Maybe I should start looking for an amp that handles 2 ohm and lower loads more nimbly.
//p
