Amp advice sought for Coincident Total Victory


I had driven my Coincident Total Victory II's with 100 W el34's. Now It's a 12 W 300b. I like the tonal accuracy and low level detail much more but do miss two things about the higher powered amp. One is the ability to occasionally turn it up. The other is the headroom needed to to accurately reproduce the fast rise of, for example, a piano or drum. For me, the TV II's are just below the efficiency needed for 300b amplification. Does anyone have experience with a sub $4k used tube amp or amplifier topology that would be a good compromise?

Thanks in advance,

Dave
dbrewer12345

Showing 2 responses by almarg

02-13-11: Dbrewer12345
After the above post, it dawned on me that I should be taking the electrical data while playing a 60 Hz test tone. The results with MAX GAIN FROM THE PREAMP (emphasis added):

Voltage across the amp inputs- 3.7 V AC.
Voltage across the speaker terminals - 8.5 V AC
Current through the speaker cable - 0.7 mA AC or 0.0007 A AC
Not a good idea. You're probably clipping the amplifier severely, which if the amp were more powerful could destroy your tweeters. A severely clipped 60Hz (or other) waveform contains high frequency spectral components at significant energy levels, that would be routed by the crossover network to the tweeters.

The voltage reading at the amp input would appear to confirm that is happening, the reading being about 14db higher than the amp's 0.7V sensitivity rating that you indicated above. I have no idea what to make of the very low current measurement, assuming it is not a mistake. What did you hear while you were doing this?

Greg (Allchemie), could you elaborate on your experience with and impressions of the Dragon? I have been considering that amp myself, as I indicated in this thread. Thanks!

Regards,
-- Al
Greg, Mike, Montejay, thanks very much! Excellent info, particularly that a Dragon Mark II is in the works, as I wasn't intending to purchase immediately. Hopefully the price won't increase commensurately with the weight :-)

Best regards,
-- Al