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90db 4 ohm with tubes?

Hi - I'm thinking of upgrading my speakers. On my list of things to check out is the Usher Mini Two Dancer, which is rated at 90db @ 4ohm. My amplifier is a Cary V12R running at 100W in ultra-linear. In theory at least, would this combination work? I've always had the notion that tubes would work best with an 8ohm load, but I though it was worth asking about.
grimace
thuhaile
105 posts
 
I'm driving them with a much lower power 30w output Mastersound Compact 845 int amp and the sound is great, to my ears :)
atmasphere's avatar
atmasphere
11,850 posts
 
Al, the amp will be fine on that speaker if it employs negative feedback of sufficient amount. At that point it will behave as a voltage source as far as the 28 ohm peak is concerned.
almarg's avatar
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almarg
9,670 posts
 
Hi Ralph,

The manual for the V12, which appears to be very similar to the OP's V12R except for differences in the input section, indicates that it is a zero feedback design. (The manual for the V12R is silent on that question, though). Also, JA's output impedance measurements of the V12, and his measurements and statements about the sensitivity of its frequency response to load impedance, seem very consistent with the use of little or no feedback.

Best regards,
-- Al
zd542
5,339 posts
 
I know on some Cary amps, they allow you to switch feedback on and off. I don't remember if the V12 was one of them.
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