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
 

Sending the unit back - can have refund, fixes, or store credit.  Was wondering if trying to let them fix it is worth it?

hgeifman
2,186 posts
 

@kevinshunt, you should ask for a full credit refund on your Audible Illusions Modulus 3A preamp.  The preamp was preowned, and you have no clue else might go wrong. Sometimes you repair one thing and something else breaks.  Others on this Forum may have a different opinion but THIS is my opinion. 

I have heard that common issues with the Audible Illusions Modulus 3A preamp include problems with the tubes, which may need replacing with high-quality ones to prevent excessive noise or distortion.  

 

kevinshunt OP
15 posts
 

They give a 90 day period, if they can even get it working, so gonna go ahead and risk it

jew16384's avatar
jew16384
59 posts
 

Measure power supply voltage.

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