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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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Vinyl Asylum Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ. |
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In Reply to: They confuse material value with sonic accomplishment. The Slee circuit is actually....................... posted by viridian on October 18, 2009 at 11:26:57:
Active RIAA in a single gain stage using series feedback topology is the classic Lipshitz network. This is actually a very common topology due to the ease of implementation - Musical Fidelity implement this network (with a slight modification to include elements of Baxandall's solution) in their V-LPS, X-LPS, X-LPSv3.
The advantage is decent noise performance by having the gain in a single amp and the penalty in RIAA deviation is minimal (with the small error introduced by the non-inverting gain) plus a decent overload margin. Extraordinarily good performance can be squeezed out of said circuit using the NE5534 op amp. When used correctly, you don't need to go to the expense of using such high speed opamps as used in the Graham Slee. The quality of the signal path capacitors is the main determinant of the sound quality (assuming the designer has implemented the basic circuit correctly).
Polystyrene capacitors are my preferred choice rather than metal film polypropylene. However, given the cost of those, the SLee might even double in price!
Regards Anthony
"Beauty is Truth, Truth Beauty.." Keats
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- RE: They confuse material value with sonic accomplishment. The Slee circuit is actually....................... - flood2 16:51:41 08/31/15 (0)
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