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

Showing 2 responses by wheezer1

wheezer1
8 posts
 

Greetings,

It sounds like the push-buttons, one or more.

Push them several times and try that. Then use compressed air. Then Deoxit.

Less likely is the selector but spin that gently.

Even less likely are the tubes. Post pics or contact me via PM.

I've been repairing and referbing them for over 10 year.

Cheers,

Wheezer

wheezer1
8 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

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