2. amps-preamps
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McCormack DNA-2 DLX balanced input impedance

I recently upgraded my pre/pro and now have balanced outputs. I would like to use balanced cables between this and my McCormack DNA-2 DLX. Upon inquiring about doing this, it has come up that I should send my amp back to Conrad Johnson/McCormack Audio of Virginia and have some mods done to change the input impedence from the current "high" level to a "low" level. Apparently they're saying that this provides a more stable amp.

Does anyone have any experience or similar experiences with their McCormack amps and XLR interconnects?
bundy

Showing 2 responses by bundy

bundy OP
127 posts
 
I am aware of the SMC upgrades. This was an inexpensive mod to alter the input impedance only. They seemed to indicate that I should not use the XLR inputs until doing this.
bundy OP
127 posts
 
Thanks Steve for the great information. I am a very clueless electrician but have access to a multimeter. Could you (or anyone else) describe with a little more detail on how to test the XLR input's resistance? For instance: Should the amp be on or off? Do you check pins 2 & 3 together or individually to pin 1? That kind of stuff.
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