What should you pay particular attention to when choosing tubes for Aesthetix?

For Aesthetix, the right tube set depends on the specific model. The Rhea mainly uses 12AX7 / E83CCS and 6922, while the Io also uses these types plus 6SN7. In the Atlas, one 6SN7 per channel is used as the tube gain stage. Across models such as Janus, Calypso, Pandora and Romulus, 12AX7, E83CCS, 6922 and 6SN7 are therefore key tube families. Since Aesthetix refers to matched tubes and correct socket positions, replacement should always be model-specific. BTB offers many suitable types in selected quality, also as matched pairs or quartets depending on the unit.