Yup, used it to test this new chip-amp that is not sorted out, somewhere something is wrong... just buy the pcb's from Rudi... At first I thought it was playing too soft, as they are won't to do into line-level, but it is actually fine, very low output impedance probably the cause.
The gain should be high-ish afaik to get it to sound nice, You could prolly use the clip+ volume control, but I just do a volume control in front of the inputs on the lm3886 and bob's your uncle...