Quad Upgrades

Quad Upgrades

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.

Quad Upgrades

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Quad Elite CDP / CDS Upgrade - Stage 1
The Quad Elite CDP & CDS cd players produce good sound in standard form. With our upgrades fitted you get a smoother, more detailed & dynamic sound. Stage 1 Upgrade Massively improved power supply capacito..
£275.00
Quad 303 Power Amplifier Upgrade - Stage 2
Quad 303 Power Amplifier Upgrade - Stage 2 Quad 303 amplifiers are incredibly robust. The design is stable into any load and with our upgrades fitted is capable of stunning sound quality. The Quad 303 delivers good deta..
£230.00
Quad 306 Power Amplifier Upgrade - Stage 1
A much under estimated little amp, the Quad 306 is a great performer even in standard form; punchy and more detailed than a standard 405 to these ears. With an upgrade applied however, it really is a great sounding amp. ..
£165.00
Quad 306 Power Amplifier Upgrade - Stage 2
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 instr..
£275.00
Quad 34 Preamp Phono Stage PSU 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 no..
£80.00
Quad 34 Preamp Upgrade - Stage 1
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 tonali..
£165.00
Quad 34 Preamp Upgrade - Stage 2
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 replac..
£330.00
Quad 34 Preamp Upgrade - Stage 3
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 "r..
£500.00
Quad 405 Upgrade - Stage 1
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 lo..
£195.00
Quad 405 Upgrade - Stage 2
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 lo..
£340.00
Quad 405 Upgrade - Stage 3
Our Zero-Compromise upgradel of the Quad 405 featuring the finest components available for the ultimate 405. Quad 405 Upgrade - Stage 3 Red Hill Audio Quad 405 Dual Mono Power Supply Circuit Board 4 x Mundorf Mlyti..
£430.00
Quad 44 Preamp Upgrade - Stage 1
Upgrades for all versions of the Quad 44. Our upgrades again use the finest-sounding components to give a much more detailed and smooth sounding preamp which keeps you listening for hours Quad 44 Preamp Upgrade - Stage 1 ..
£165.00
Quad 44 Preamp Upgrade - Stage 2
Upgrades for all versions of the Quad 44. Our upgrades again use the finest-sounding components to give a much more detailed and smooth sounding preamp which keeps you listening for hours. Quad 44 Preamp Upgrade - Stage 2 ..
£285.00
Quad 44 Preamp Upgrade - Stage 3
Our Quad 44 Preamp Upgrade - Stage 3 really does have to be heard to be believed! It consists of again replacing critical signal path components and opamps with far superior sounding modern audio types. The main upgrade ho..
£500.00
Quad 606 Mk1 Upgrade - Stage 1
Quad 606 amplifiers represent one of the best hifi bargains around. With its roots in the amazing 405, the circuit has been refined for improved sound-quality. With a large transformer and space for larger power smoothing ..
£275.00
Testimonials
Marantz CD94 Mk2
«Stage 2 upgrade - very impressed. It was always good but the difference is marked. The detail and the tightness is wonderful, vocals are now so go ...»


Steve B... Chester...

Quad 306 Stage 1 ...
«
Hi Lee

Ive been playing the quad 306 power amp after getting it back off you today, sounds really a lot better, clearer and its  ...»


Steve A...

Audiolab 8000c Se...
«Hello Lee,

The Audiolab arrived last Friday and I have had a chance to burn the new components in and assess the results.  I do n ...»


Michael...

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