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Old 7th June 2006, 03:34 PM   #1
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Default Tweaking Mcintosh

I noticed some of the carbon resisters presumably ABs in my Mc2100 have changed a fair bit in value. I am thinking of changing the whole lot with Riken carbon resistors. Anybody tried that? Any advice would be appreciated.



ckt
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Old 7th June 2006, 03:43 PM   #2
anatech is offline anatech  Canada
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Hi diyman,
That is not uncommon to find with carbon composition.

My advice. Use metal film in the critical signal path positions. Make sure they are not inductive designs. Metal Oxide resistors in other positions work very well. I use them when rebuilding McIntosh units, and others. Far more stable and quieter than carbon composition types.

I only use carbon composition in RF circuits. Inductance is the main consideration there.

-Chris
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Old 7th June 2006, 05:34 PM   #3
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Default Tweaking Mcintosh

Thank you for your advice but then wouldn't replacing the carbon resistors with the metal film variety alter the "romantic sound" of the MC2100?

Regards,

ckt
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Old 7th June 2006, 05:48 PM   #4
anatech is offline anatech  Canada
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Hi diyman,
In my honest opinion - no. What you will do is lower the background noise. You will also eliminate some resistance vs voltage changes. The actual "sound" of this amp should only improve.

You will change the sound possibly, just by correcting the off value problems. When that amp was shipped, those parts were in tolerance, so the sound has changed from what the designers intended (and "voiced") anyway. In other words, you are not listening to a McIntosh right now.

-Chris
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