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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

RE: Audio Research SP9 MK2

Thanks for your feedback, I do have a strong electronic backgound so hand on modification is not an issue. Just need a sudgestion from anyone own AR preamp with mod to bring more beautiful sound to my ears. I am thinking to replace yellow 5MF/250VDC output coupling cap to same value Paper oil cap, Wonder cap 0.47MF to Paper oil same value. All Bypass caps should keep it or removed permanently?
For the rectified diode , AR used 1N4006 on the High voltage supply but I think replace fast recovery diode NTE580 will do any better??? For the tube filamenton 6DJ8 AR used 1N4005.Should I replace all with fast recovery diode? Need more advise please.



Edits: 12/24/08 12/24/08 12/24/08

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