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In Reply to: RE: Audio Research SP16 Phono Stage Question posted by AGolski on August 23, 2012 at 18:31:53
My Audio Research Sp-15 is solid state except for the three tube phono section.
I now use a different preamp, but keep the SP-15 around just to use the phono stage in it. It's phono stage is very good.
I would have to spend $,2500. or so to better it.
I do not know how close the phono stage in the SP-16 is to my SP-15.. but it must be similar.
Edits: 08/24/12Follow Ups:
The SP-15 is based on the hybrid SP-11, with the line stage of the latter (with three 6DJ8s) replaced by a FET circuit. I don't think its circuit is at all similar to that of the SP-16, despite the similar model numbers - it came out almost fifteen years later. I haven't seen the detailed schematic of the SP-16, but I suspect it is a much simpler design.
Alex
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The SP15 uses 6922/E88CC tubes and, given the rest of the design, I suspect it makes use of FET's in supporting roles.
The SP16 is probably closer to the simple 3 tube 12AX7 circuit in the SP3 and SP6 preamps - which is probably not a bad thing.
I think the SP16's phono sounds quite good, but I much prefer the (modded) Cary PH302 I use with my SP16.
System Details
Edits: 08/24/12 08/24/12
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