Quad Preamp Upgrades

We provide a huge range of upgrades for the majority of Quad preamp models.

Unfortunately, due to the increasing number of failing switches inside the old Quad 33 we can no-longer support these units.

 

 

Sort By:
Show:
Display: List Grid
  • 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 noise psu. The addition of our discrete low-noise voltage regulators reall..
    £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 tonality. Stage 1 Upgrade Panasonic FC Low-ESR/ESL power supply smoothin..
    £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 replacing the original noisy "rail splitter" type. The transformer is replaced wi..
    £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 "rail splitter" type. The transformer is replaced with a larger, higher cu..
    £500.00
  • 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 Once upgraded the Quad 44 has more detail, more naturalness and improved tonality. Quad 44 Preamp Upgrade ..
    £185.00
  • 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 Increased capacity Low-ESR Power Supply Capacitors Output sign..
    £285.00