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 upgrade.
With our upgrades applied, the Quad 606 Mk2 / 707 / 909 / Elite gets smoother, slightly more detailed and has more air & space around instruments. The improved and additional capacitors remove more noise and ripple from the power rails improving every aspect of the sound. You get greater transparency and a cleaner sound which keeps you listening for long periods with no listening fatigue.
STAGE 1 UPGRADE
Mundorf MLytic AG Low-ESR/ESL power supply smoothing capacitors
Elna Cerafine audio-grade electrolytic capacitors
Additional High Quality PPS Film Capacitor decoupling added
Improved signal-path wire using Audio-Wire Super-Silver OFC
NOTE: This standard upgrade is for the power amp section only. By default, we bypass the opamp input and wire direct to the power amp input, just like in the Quad 405, 606, 707. This brings gains in transparency, detail and smoothness. If you'd like us to leave the original circuit in, please emai or call and let us know.