Hello Will, good day. I've enjoyed Fosi products quite a lot. I own a pair of ZA3 as monoblocks and 2 V3 mono. Wonderful sound. I'll be getting the ZP3 pre amp. Regarding the S3 lite, that will kick out your competition as no one offers that solution and we're eager to get the core function, please consider USB out. Regarding normal S3, I don't see why a streamer should have a USB input (for PC or cellphone connection), but a USB out is a must. Other than that, the truth is that subwoofer out, bass management and room correction (PEQ per chanel) are great features implemented in Wiim Ultra, but if you'll offer Airplay 2, you'll crush Wiim as there are millions of Apple Music subscribers.
Take care and keep with the excellent job you're doing.
Take care and keep with the excellent job you're doing.
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