2. amps-preamps
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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
kevinshunt OP
15 posts
 

Yes it was advertised in full working order

hiend2's avatar
hiend2
418 posts
 

Did you at least contact the seller.

I hope it works out but

Id thing new tubes might not be the problem..

They are great preamps I have owned 4

kevinshunt OP
15 posts
 

Contacted them last Friday, hoping to hear back Monday, they are a reputable reseller out of CO.  Yeh I'm disappointed as I really wanted to hear it in my system, it's replacing a Peachtree Nova pre that's out of rca inputs.

kevinshunt OP
15 posts
 

Yeh it’s the very very faint sound when at full volume that may be a non-tube issue

laginz
35 posts
 

If it was just the phono section, it could be you are running a very low output moving coil cartridge. Unless it has the optional John Curl phono board, the regular Audible Illusions phono board does not have much gain.

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