2. amps-preamps
  3. 1137965724

CD output voltage too high for preamp: what to do?

I have an Audible Illusions preamp which is designed for a 1.5v input signal. I am told that this is standard. My Ayre CX-7e puts out 2.25v. They play beautifully together but I have too little control over volume: I cannot use the preamp vol controls beyond 9 o'clock because it is way too loud. Likewise it is hard to get just the right volume in the limited range available. This is worse with some CDs for reasons I do not know.
Audible Illusions will change the preamp attenuation board for $275, but before I do so I wonder how others have dealt with the problem of newer CD players with higher outputs than their preamps were designed for.
gmargo
dacostab
84 posts
 
If your AI preamp is out of warranty and you have the schematics, you can probably get a good tech (if you know one) to change a couple of resistors on the premap attentuation board....come to think of it, AI should do this for you at a very low cost.
downunder
1,329 posts
 
Endler attenuators r the best and easily crap on the Rothwell's. I have both and the Endlers are transparent and flexible as you can set the exact attenuation you need.

Go for these. BTW, just a happy customer

http://mysite.verizon.net/vze4c5pt/id2.html
restock
831 posts
 
I have similar problems: A tube preamp with 23 db gain, a fairly high output CDP with 2.3V, a very sensitive amp. Overall this results in about 10db too much gain.

As for solutions:I also read about mixed results with the Rothwell attenuators and therefore ended up looking at the following attenuators:

- Endlers variable stepped attenuators
- EVS fixed volume attenuators

Overall the EVS seem like the best solution. Another alternative of course is to go completely passive.

Rene
clio09
3,355 posts
 
In looking at the Endler attenuators they appear to be a replacement to the active preamp, not used with it. Am I understanding this correctly? If they indeed can be used with an active preamp to reduce the gain, these might be worth a try.
hiend3
38 posts
 
Ive owned the audible illusions M3A 3 of them. the stepped attens are not a good thing for CD. I say sell the M3A, I switched the a eastern electric mini-max (used 500.00 and dont miss the m3A at all.
The Add on attn units ive tryed also roll off frequency extremes. You just cant win with that m3a's curve. even when you can get it matched the steps are still too far apart. I had a Tjoeb 4000 and reduced the level to .75 volts and still wasnt heppy...
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