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Quad Power Amp Upgrades

Upgrades for the whole range of Quad Power Amplifiers

Model: Quad 303 PSU PCB Module
Due to a lack of availability of 35mm diameter capacitors needed to fit the original capacitors clips inside the Quad 303, we have developed a new, high quality power supply enabling the use of modern, smaller and higher quality capacitors.High quality PCB with thick copper tracesPower & Ground ..
£99.00
Model: Quad 303 Upgrade - Stage 1
QUAD 303 POWER AMPLIFIER UPGRADE - STAGE 1Quad 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 detail and great rhythmic drive combined with an almost valve-like fluid quality.With o..
£265.00
Model: Quad 306 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.As always, replacing the ageing original electrolytic capacitors improves all area..
£165.00
Model: Quad 306 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 instruments. Deeper & warmer bass performance.STAGE 2 UPGRADEAdditional PPS ..
£275.00
Model: Quad 405 Stage 3 PCB Module (Pair)
Quad 405 Stage 3 PCB Module (Pair).Incorporating all of our upgrades into a new design has enabled us to product the finest sounding Quad 405 upgrade available.Due to their complexity, it was becoming increasingly difficult & time-consuming to incorporate the upgrades onto the original pcb's so ..
£285.00
Model: Quad 405 Transformer Replacement
QUAD 405 TRANSFORMER REPLACEMENTReplace a buzzing/humming mains transformer with a high quality toroidal type.Comes with custom aluminium mounting bracket.High Current 300va Toroidal TransformerCustom Mounting BracketIncludes Fitting and Testing..
£150.00
Model: 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 long in the tooth. Electrolytic capacitors really only have a lifespan of aro..
£199.00
Model: 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 long in the tooth. Electrolytic capacitors really only have a lifespan of aro..
£340.00
Model: 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 3Red Hill Audio Quad 405 Dual Mono Power Supply Circuit Board4 x Mundorf Mlytic AG smoothing capacitorsPower Cabling Upgraded to Red Hill Audio Teflon Insulated S..
£430.00
Model: 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 capacitors it is a robust sounding candidate for upgrade.With our upgrades appl..
£275.00
Model: Quad 606 MK1 Upgrade - Stage 2
QUAD 606 MK1 UPGRADE STAGE 2Quad 606 Mk1 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 capacitors it is a robust sounding candidate fo..
£395.00
Model: Quad 606 mk2 707 909 Power Amp Upgrade - Stage 1
Quad 606 Mk2 / 707 / 909 / Elite amplifiers represent one of the best hifi bargains around. With their roots in the amazing 405, the circuit has been refined for improved sound-quality.With a large transformer and space for larger power smoothing capacitors it is a robust sounding candidate for..
£285.00
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