Stepped Attenuator for AI Modulus IIA

ditubo · 11th February 2011, 05:38 AM

What would be the best affordable stepped attenuator to replace the volume pots (continuous type) on an Audible Illusions Modulus IIA and what other mods can I do to it? I will be receiving the preamp any time tomorrow (Friday Feb 11, 2011) and am very excited. I want to hear how it will sound compared to my for mer pre (Counterpoint SA 7.1). Also need to know which value for the pots, 50K or 100K. Thanks in advance.

Is it even worth the time to modify the volume pots?

mastodon · 11th February 2011, 09:45 AM

Why not just listen to the amp 'as-is' for a while, and then decide if it requires improvement and in which areas?

kstagger · 11th February 2011, 12:34 PM

Cheap volume pots can suffer from channel imbalance. I've had it happen with "Blue Alps" (note - could be counterfeit knockoffs), I've replaced it with a stepped attenuator and it did sound better. - better balance between channels and a 'smoother' volume grade.

But as mastodon noted, give it a listen before you modify.

DF96 · 11th February 2011, 01:36 PM

Quote:

Audible Illusions

What a wonderful name for audio equipment! Are they admitting that it is not what it seems?

I agree with the others. Listen to it before you start fiddling with it. Assuming, that is, that it was bought in order to listen to music rather than as a platform for bragging to friends.

Wavebourn · 11th February 2011, 05:31 PM

My friend from Israel shipped me some ladder attenuators. I can't think about anything better. He made for 10K, 50K, and 600 Ohm. PM me if you want more info.

nsx51 · 28th December 2011, 03:53 PM

ditubo, I also have a Modulus 11a, and am curious as to what you have done to yours. Did you change the volume pots? Anything else?

11th February 2011, 05:38 AM	#1
ditubo diyAudio Member Join Date: Sep 2010	Stepped Attenuator for AI Modulus IIA What would be the best affordable stepped attenuator to replace the volume pots (continuous type) on an Audible Illusions Modulus IIA and what other mods can I do to it? I will be receiving the preamp any time tomorrow (Friday Feb 11, 2011) and am very excited. I want to hear how it will sound compared to my for mer pre (Counterpoint SA 7.1). Also need to know which value for the pots, 50K or 100K. Thanks in advance. Is it even worth the time to modify the volume pots?

11th February 2011, 05:31 PM	#5
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	My friend from Israel shipped me some ladder attenuators. I can't think about anything better. He made for 10K, 50K, and 600 Ohm. PM me if you want more info. __________________ If I disappear suddenly, that means I finally created a time machine and pushed wrong button that brought me to Stalin's Russia. In any experiment any result is the result. Even if it is negative.

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11th February 2011, 09:45 AM	#2
mastodon diyAudio Member Join Date: Jan 2011	Why not just listen to the amp 'as-is' for a while, and then decide if it requires improvement and in which areas?

11th February 2011, 12:34 PM	#3
kstagger diyAudio Member Join Date: Dec 2003 Location: Grand Rapids	Cheap volume pots can suffer from channel imbalance. I've had it happen with "Blue Alps" (note - could be counterfeit knockoffs), I've replaced it with a stepped attenuator and it did sound better. - better balance between channels and a 'smoother' volume grade. But as mastodon noted, give it a listen before you modify.

28th December 2011, 03:53 PM	#6
nsx51 diyAudio Member Join Date: Dec 2011 Location: Oak Ridge, TN	ditubo, I also have a Modulus 11a, and am curious as to what you have done to yours. Did you change the volume pots? Anything else?