A80 Mk-1 - A80 has slower, rounder timber and not as transparent. Good tape handling
A820 - A820 has a bigger stage, slower, lay-back and not as transparent. Best tape handling
ATR-102 by ATR Service - 102 has a bigger stage, darker but better timber. Good - tape handing
ATR-102 by Bernie...
Yes, I did. I own ATR-102 by ATR Service, ATR-102 by Bernie Grundman Mastering, A80 Mk-I and A802. Nagra T-Audio and 4s with QGB. The Ballinger is very closed to Nagra T.