2. amps-preamps
  3. 191984-194577

Audible Illusions Modulus 3A troubles

Just purchased a used Audible Illusions Modulus 3A preamp for my system but only getting very very faint sound when turned all the way up.  Plus the very very faint sound is very fuzzy as well. 

I popped off the top & re-seated the 4 tubes but that was no help.

My 2 amps are both rated at 50k ohms input sensitivity, so this is the right preamp for them at around 1.2k ohms output sensitivity, running a biamp configuration.  AI documentations confirms this.

I've tried each amp on its own, using both output RCAs on the preamp, to no avail.

How to tell what is wrong...looking into the return policy, but at least the shipment was insured.

Any ideas?

Thanks-Kevin

kevinshunt
wheezer1
4 posts
 

Hello Kevin,

Happy to hear the seller will return it to functional state.

Please understand you cannot use ANY NOS tubes in an unmodified AI. You'll be good with the aforementioned Russian tubes.

Regards,

-W

laginz
44 posts
 

I have used Tungsram 6922 NOS tubes with Audible Illlusions preamps for close to 30 years and have never had a problem. They sound great. I do agree with previous poster that generally NOS tubes do not work well with AI preamps.

kevinshunt OP
17 posts
 

So it sounds great in my system, actually there is a noticeable difference that I appreciate, highs and mids are clearer and presented in space more vividly. Bass is pretty much the same (great).
 

Kevin 

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