
The Lee Custom Amplifier 12AX7PRE is a compact vacuum tube-based preamp and booster pedal built around a 12AX7/ECC83 triode tube. It features an all-tube amplification stage with tone controls (Treble, Bass, Volume) and internal band-frequency switches, giving a warm, amp-like dynamic response and natural overdrive characteristic. The dual tube stages and tone shaping provide a rich, tube-driven preamp boost rather than a typical solid-state buffer.