Amp advice sought for Coincident Total Victory

Thanks everyone, now I am more confused than ever:).

After reading the replies, I took some measurements. WIth full gain (0.7 V AC input) to one amp and the other turned off, my Extech spl meter (c weighting, slow response) read only 85 dB both at 1 m from the drivers in front and at the same distance from the side mounted woofers. According to my knowledge, if the speakers really are 97 dB, then at -12 dB, the speakers are only seeing about 1/16th of a watt. Under the same circumstances a voltmeter placed across the speaker terminal read about 1.4 V AC. The current through the speaker cable was about 0.05 A AC. I am not sure if the electrical measurements have any meaning, as they were taken with an ordinary multimeter and the AC settings may only work for 60Hz. Is this an indication that I am not getting the power I should be from the amps?

The amps are original version Cary Cad 300se's. From what I can find they are somewhere between 15 and 18 years old. All tubes are new with the exception of the rectifier tube. As far as I know, the rest of the parts are original.

I would appreciate any insights.

Thanks again,

Dave

Dave
One point to keep in mind is that Israel Bloom used your speaker(mine also) heavily for the design and circuit of the Frankenstein MK2.He`s adamant that it will easily drive any Coincident speaker he has built.The fact is all 300b amps are`nt equal, they range all over the map. As Azaud mentioned above the 6em7 driver tube is ultra high current and requires it`s own PS seperate transformer.It`s very extended and powerful as per design. I hope you`ll get the chance to hear one and judge for your self. The Cary may have different design parameters.

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:

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

I can see no reason why the Coincident Technology Frankensteins wouldn't be great. If you feel you need more power I would go with the Coicident Technology Dragon. At 75 watts per channel, they might almost be overkill.

If you want, you should also call Mr. Israel Blume, as he is the designer of all things "Coincident".

In my mind, he is the best designer in the high-end and gives the best bang for the buck. Both of his amps are the best in their price range and his linestage is easily the best at, or even much over its price range. One would probably have to go up to the Einstein The Tube Mark II to either meet or possibly exceed its performance. And it is over 3 timnes the price.

Greg

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