The PX4 Valve Amp

Inspired by our revered designs from the 1940s and 1950s, this amplifier pays homage to the legendary British PX4 valve – a beacon of acoustic excellence that prioritises revelation over raw power.

At its heart are two pairs of Direct Heated Triode PX4 valves - chosen not for their power output, but for their unrivalled ability to reveal musical truth. Delivering 10 watts per channel of exquisite sound, this amplifier embodies our philosophy that true fidelity comes not from brute force, but from purity of signal reproduction.

Every element has been meticulously considered, from the custom-wound transformers crafted in Dorset to the point-to-point wiring that eschews printed circuits in favour of a construction method that enhances both reliability and sonic qualities. The chassis, precision-machined from aluminium and finished with a bespoke powder coating, completes an instrument that is as beautiful to behold as it is to experience.

When paired with Lowther's full-range drivers, the PX4 amplifier creates a synergy that must be experienced to be fully appreciated.