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.

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  • Quad 606 Mk1 Upgrade - Stage 2
    Quad 606 Mk1 Upgrade Stage 2 Quad 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 cand..
    £425.00
  • Quad 606 Mk2 / 707 / 909 / Elite 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..
    £295.00
    Based on 1 reviews.
  • Quad 606 Mk2 / 707 / 909 / Elite Upgrade - Stage 2
    Quad 606 Mk2 707 909 Elite Upgrade Stage 2 Quad 606 Mk2 / 707 / 909 / Elite Upgrade 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 smoothi..
    £425.00
    Based on 3 reviews.
  • Quad 66 Preamp Upgrade - Stage 1
    The Quad 66 really benefits our upgrade packages. An upgraded Quad 66 has more detail, more naturalness and improved tonality. Bass depth, definition and overall naturalness are improved markedly. Stage 1 Upgrade Panasonic Low-ESR/ESL power supply smoothing capacitors Elna Cerafine dec..
    £165.00
    Based on 1 reviews.
  • Quad 66 Preamp Upgrade - Stage 2
    The Quad 66 really benefits our upgrade packages. An upgraded Quad 66 has more detail, more naturalness and improved tonality. Bass depth, definition and overall naturalness are improved markedly. Quad 66 Preamp Upgrade - Stage 2 Rubycon Low-ESR/ESL power supply smoothing capacitors El..
    £275.00
    Based on 2 reviews.
  • Quad 66 Preamp Upgrade - Stage 3
    The Quad 66 really benefits our upgrade packages. An upgraded Quad 66 has more detail, more naturalness and improved tonality. Bass depth, definition and overall naturalness are improved markedly. This Stage 3 Upgrade dramatically improves dynamic ability. Bass becomes much deeper, better defi..
    £499.00