I don't have the 102 but I'm pretty sure the left switch is mute, and right shifts between class A and class AB (not sure which is up/down). You can download the manual at www.pliniusaudio.com, or just see which gets hottest/sounds best.
>Elb are you planning on checking out some higher Plinius poweramp? sa201, 250mkIV, odeon or ref? and this 102 you just auditioned - no trouble running your speakers? power-wise that is
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