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 77 / 99 CD Player Upgrade - Stage 1
The Quad 77 & 99 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 capacitors for i..
£275.00
Quad 77 / 99 CD Player Upgrade - Stage 3
Taking things even further, the Stage 3 adds three of our discrete low-noise voltage regulators for the main supplies. Again, this improves every aspect of the sound quality. Stage 3 Upgrade Massively improved power ..
£775.00
Quad Elite 77 / 99 CD Upgrade - Stage 2
The Quad 77 & 99 cd players produce good sound in standard form. With our upgrades fitted you get a smoother, more detailed & dynamic sound. Stage 2 Upgrade Massively improved power supply capacitors for i..
£575.00
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
Based on 1 reviews.
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
Based on 1 reviews.
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
Based on 1 reviews.
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
Based on 4 reviews.
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
Testimonials
Arcam Alpha 9 CD ...
«Doing business with Red Hill Audio is pretty easy! My CD player had suffered the hum problem, from decaying electrolytics in the power supply, and ...»


Stephen... Ipswich

Audiolab 8000a Up...
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Hi Lee,
 


James Lisk

Quad 66 CD & ...
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Hi Lee,
Having given the CD player & pr ...»


J Laidler

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