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Old 12th March 2007, 01:53 PM   #1
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Default To SRPP or not?

I have searched the threads but of course the debate rages... Whats the lowdown on SRPP... vs Cathode follower (with regards to a 6sn7 preamp) and what if you convert the srpp into a true ccs? what then. Is this all about cancellation of the second harmonics and harshness (read odd order harmonics)
what are the ads/disads?
Thanks for your help
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Old 12th March 2007, 02:45 PM   #2
EC8010 is offline EC8010  United Kingdom
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Default Briefly...

SRPP has gain; a cathode follower generally has about 1dB loss. SRPP doesn't have the full gain of mu, so it has significantly higher distortion than a mu-follower. The distortion of the lower valve has to be very low before there's any cancellation with the upper valve (effectively a cathode follower), so that means that only mu-followers need apply for cancellation, and even then the effect is barely noticeable.
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
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Old 12th March 2007, 03:01 PM   #3
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They have low output impedance BUT that doesn't mean they can source unlimited current.
Due to economical cutbacks, the light at the end of the tunnel has to be switched off.
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