The total line gain is 15dB, with a high quality potentiometer controlling the output levels. Reminiscent of the original QC-22 control module, there is a simple balance control allowing for variation from left to right of up to 12dB.
Amplification is provided courtesy of a twin triode 6111, new old-stock valve - originally designed for use in the guidance systems of missiles and manufactured to exceptionally high tolerances. The remarkably long expected life-span of this valve means we can comfortably build it into the PCB without the compromises usually experienced when using valve seats.
Two buffered tape loops are provided as standard.
Ken Kessler, Hi-Fi News
“Quad has succeeded where few of hi-fi’s gamblers dare: They’ve followed the ESL-989 with not just a worthy amplifier, but with a silent smooth and precise control unit as well.” -
Peter Walker always believed that an amplifier should be as simple as possible - engineer with the fewest possible components and with a performance largely independent of those components.
The QC-twenty-four, a low-noise RIAA curve phono stage has an understated elegant simplicity, although we use high quality components wherever these appear in the signal path.
Bifurcated contact relays (crossing each other at right angles to make a better contact) are used on each input to maintain the best possible signal conduction. Gold- plated connectors and a carefully screened enclosure are further examples of the attention to detail throughout the construction.
