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Audio Research SP9 MK2

Hello everyone,
I have an Audio Research SP9 MK2 preamp, does anyone have any sudgestion to improve sonic sound similar to SP9 MK3? Like fast recovery rectified diodes, coupling capacitors?
Thank you in advance.

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Topic - Audio Research SP9 MK2 - der451b@yahoo.com 14:43:13 12/22/08 (16)


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