Conrad-Johnson factory model upgrades install the same parts and circuits that were incorporated in the latest or upgraded model version. An upgraded unit is electrically the same as the original production model.
We offer the following model upgrades:
Preamplifiers
ACT2 to ACT2 S2 (includes C1 Upgrade)
ART to ART Series 3 (includes C1 Upgrade)
ART Series 2 to ART Series 3 (includes C1 Upgrade)
Premier 16 to Premier 16 S2
Premier 17LS to Premier 17LS2 (includes C1 Upgrade)
ET3 to ET3SE (includes C1 Upgrade)
GAT to GATs2
ET7 Series 1 to ET7 Series 2
Classic 2 to Classic 2SE
Phono Preamplifiers
Premier 15 to Premier 15 Series2
TEA2 to TEA2SE (includes C1 Upgrade)
Amplifiers
Classic Sixty to Classic SixtySE (includes C1 Upgrade)
