Every few months a kind customer submits this question into my help form.
And I kindly reply... perhaps we're not the best fit for you. Please try a beefier amplifier because the Quads can present a 1 ohm load at times and we're only safe for 4 ohms.
This customer used his ONE.3 in mono configuration (all current to one output chip) and blew away one of the power traces on the TP2051 chip as shown below.
Please don't do it.
Seth
