Mullard 12AX7 has opulent luscious sonics and great resolution. Mullard 12AX7 has a long plate design that gives it dense low-mids in audio application. Mullard 12AX7 also provides full bodied tone in guitar amps.
Mullard 12AX7 is our go-to 12AX7 for audio application. As such, we have tried it in many amps from Jolida to McIntosh. We found Mullard 12AX7 delivered articulation and clarity. Mullard 12AX7 also provides warmth that matches with both vintage and modern recordings.
Mullard 12AX7 is designed and constructed for low noise. Mullard 12AX7 has low microphony due to precise assembly. The filaments are also completely encased. This eliminates electric noise caused by stray electrons. Although it does make it hard to see if the filament is on.
An excellent all rounder, Mullard 12AX7 is one of the top choices for upgrading any stock 12AX7 tubes.