These classic amplifiers are capable of excellent sound. With our upgrades fitted you will get far more detail throughout the frequency range, greater transparency and a toe-tapping performance with fantastic PRaT. Dynamics are improved dramatically too, and this allied to a much more open and controlled delivery really lets you hear into the recordings.
Stage 2 adds in more noise-reducing techniques, improves signal path capacitors to Mundorf MCap EVO Oil and improves the bridge components. The result: More detail, openness and clarity. Much more air & space around instruments. Deeper & warmer bass performance.
Stage 2 Upgrade
This pgrade replaces the original, noisy Zener Diode voltage regulation circuit with our Clarity-R voltage regulators. The decoupling capacitors are also upgraded to the superb Elna Cerafine. This is a massively lower noise psu.
The addition of our discrete low-noise voltage regulators reall..
The Quad 34 is one of our favourite Quad preamps to upgrade. There is space to fit superior power supply components and signal paths are kept short.
An upgraded Quad 34 has more detail, more naturalness and improved tonality.
Stage 1 Upgrade
Panasonic FC Low-ESR/ESL power supply smoothin..
The Stage 2 Upgrade replaces the original, undersized power supply with a far superior, higher current and massively lower noise psu. The new power supply arrangement has dedicated positive & negative supplies replacing the original noisy "rail splitter" type. The transformer is replaced wi..
Quad 34 Preamp Upgrade - Stage 3 replaces the original, undersized power supply with our offboard, low noise psu. The new power supply arrangement has dedicated positive & negative supplies replacing the original noisy "rail splitter" type.
The transformer is replaced with a larger, higher cu..
The vintage Quad 405 is still a great sounding amplifier, combining the very best of Quads' legendary design skills and build quality. As with all old hi-fi though, the capacitors inside the Quad 405 will be getting pretty long in the tooth. Electrolytic capacitors really only have a lifespan of aro..