Lack of bass with SP-9 MK3


I've just acquired an AR SP-9 MK3 and my short-lived excitement quickly faded. While the depth and highs are crisp and more detailed than my old GTP-500II (Adcom), the lows are uneventful to say the least.

Granted the Adcom had the Contour enabled, this preamp's lows seem non-existent. I suppose there's a chance that I've been listening to exaggerated lows, but I've tried running various genres through the unit with same results. Is the unit faulty or will new valves fix the issue?

Any suggestions would be much appreciated!
fourrings000bfd

Showing 2 responses by sherod

I would compare your output impedance of the preamp to match with the input impedance of your amp. A simple adjustment of cap values in either might be just the ticket, assuming you are going to keep the amp.
Have you talked to a representative at Audio research about this lack of bass issue? I think that also there is a modifier, Great Northern Sound( Steve Huntley) that specializes in tweaking AR gear.


http://www.greatnorthernsound.com/