This simple to fit upgrade PCB will transform the Quad 303 into a very detailed, transparent amplifier with superb bass control, holographic midrange and smooth unfatiguing treble - a very neutral sound full of air, space and
dynamics.
Only basic soldering skills are required to remove the original four wires and then reconnect them to the upgrade board.
An upgraded 303 with this board fitted would easily beat a 405-2 on sound quality and a lot of other more expensive amps. Once you have fitted one and you do not agree, a full money back guarantee is given (excluding postage charges) if you are not completely satisfied.
These PCBs now use improved OPA604 opamps, are fully built, tested and ready for shipment.
The
Hi-Fi World March 2005 Quad 303 upgrade review is available here
by kind permission.
Mini reviews by customers can be read here.
If you require any more information please email me by clicking here.
P+P is £1.85 Recorded Delivery.
Please click here and follow the links for
more information on Upgrading Quad Amplifiers.
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