Used Park P50 Classic 50-Watt Head (1966 Black Flag Plexi)

The Park Amplifier P50 Classic delivers the unmistakable voice of a late-’60s British plexi circuit with the feel, response, and craftsmanship that made original Park amps legendary. Built around a tube rectifier design and loaded with EL34 power tubes, the P50 brings together aggressive upper-mid bite, warm harmonic saturation, and the kind of dynamic compression that makes every note feel alive under your fingers. From articulate vintage crunch to full-throttle classic rock grind, this amp captures the raw energy of the coveted “Black Flag” era circuits that helped define British guitar tone.

The dual-channel layout offers added flexibility, with one brighter channel that still retains impressive low-end fullness, making it easy to dial in rich, balanced tones without needing to jump channels. Modern enhancements from Mitch Colby—including selectable bright cap voicings, an upper-mid boost, and a Post Phase Inverter Master Volume—expand the amp’s range while preserving the touch sensitivity and openness of the original design. Handwired construction, oversized transformers, and pure old-school simplicity make the P50 Classic an inspiring amp for players chasing authentic British tube tone with boutique-level build quality.

Condition: Excellent.