2. amps-preamps
  3. 1017348444

Why is my Audio Research SP6-b noisy?

I have an Audio Research SP6b pre-amp and it is very noisy-has a very loud hiss.I do have it hooked to a very large
pair of altec lansing VOT horn loaded speakers.I have used
4-5 amps and it stills has the hiss.Is this normal?
I know the horns amplify the hiss because when I hooked it
up to my klipsch speakers it was not as noticable.
Any suggestions.I just replaced the tubes.It does it with
the new tubes and old tubes.Go figure.
Anyone else have this problem?
89vett
128x12889vett

Showing 1 response by jvogt

jvogt
212 posts
 
The previous posts are correct...it likely needs new tubes.
That being said, I will also say that I owned an SP-6B
a number of years ago, and despite it's exalted reputation,
I found it lacking, especially in the relatively high
noise floor. I later owned an SP-14 which I found superior
in most regards. In it's day (late 70's) the SP-6 series
was quite good, but more recent designs substantially
better the SP-6's.
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