Small Mixers
The mixers on this page are relatively simple but high quality circuits that run on 9VDC supplies but that have an internal supply of 17.5VDC from rail to rail on the opamps (Analog Devices AD826, one of the most transparent opamps on the market).
The PCBs inside are custom made for these designs, and feature military spec plated-through double sided boards with top-notch components and layout.

MIX 2.1 : Two Channel Mono Mixer
with Relay-Controlled Loop, Transparent Buffered Split,
and Dry Kill Switch
$220

