Due to retirement (closing business and moving to another home) For sale, a Quad Hifi Set, consisting of a Quad 44 preamplifier - an FM4 tuner and a 405-2 power amplifier. A beautiful whole with the latest version of the 405 (405-2). Each module is completely overhauled according to DaDa specs (see website DaDa Electronics). These are the devices the customers could listen to after the overhaul. All modules have been extensively tested and adjusted according to the factory specs. All capacitors and obsolete parts have been replaced by quality parts (Nichicon, alps etc...). The old op-amps of the preamplifier and the power amplifier were replaced by Burr Brown op-amps which still give a better signal-to-noise-ratio. The battery of the FM4 has been replaced. Power amplifier capacitors replaced by KEMET (Audiovox) capacitors of 15,000 uF each. Comes with all cables and manuals.