In Reply to: AGI 511 posted by sergio p on September 17, 2014 at 04:43:15:
> Which are the differences between the AGI 511 with green buttons and the AGI 511 with white buttons?
Mine has green buttons; never seen white.
> How can you check if you own a 511 or a 511a ?
Very difficult to tell. Seems like the silkscreen for the front & rear panels were never updated to add the "A" suffix.
I suspect that most AGI 511 preamps are the A version even though there may be no markings to indicate it. In an IAR comparison in 1978, the 511A was judged to be the "most accurate (neutral) tonal balance" preamp beating 13 other units, and that helped make it popular.
> Which are the best upgrades for the AGI 511?
Supposedly replacing the ribbon cable and rear panel with discrete wiring and better RCA jacks.
Regards
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Follow Ups
- RE: AGI 511 - blue_z 00:49:20 09/19/14 (0)