i looked at this amp and at the v3; unless one really needed balanced inputs, i don't see why one wouldn't simply buy the v3.
sinad on the v3 is 88db vs the za3's 89db, but distortion specs are half, snr is 4db better, and power is 50% more. (at least per mfr; it seems asr's/amir's v3 measurements indicate the specs are optimistic? i've not seem measurements of the za3's).
retail prices (15% discount coupon is offered at present) are $90/32v; $110/48v; $140/48v-gan for the v3, vs $130/32v; $150/48v; (no gan ps offered?) for the za3.
does the za3 sound better than the v3? i've just started reading the asr reviews, and haven't seen that. if you want two amps, just buy the two v3's; and only use one channel; it will still make similar (or more?) power than za3's bridged. and, the subwoofer out "feature" is worthless, imo, as subs should be run in stereo, w/the mains hi passed, so they and their amp(s) won't see the low frequencies.
comments appreciated.
thanks,
doug s.