Mine is due Wednesday.
Thanks for all your help with multichannel source options over the years. The Topping DM7 looks like it could be a nice option in the SNR vs availability vs affordability juggle.
May I ask if your DM7 has been sent to you from Topping? One handpicked as measuring the best for sending for review and measurements. Or did you anonymously buy one like we would from a reseller, that represents the standard build?
A barrier for many of us with the Topping is we dont have four stereo balanced input power amps. Do you have an unbalanced RCA input power amp? Could you please try RCA for us and listen for noise eg stop a track and turn volume right up? If you do can you ask JA if he will measure the floating unbalanced FFT please? @amirm seems a bit too busy .......
The cheapest conversion is leaving the negative balanced pin floating. This $5 adapter should do that:


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Anyone using an adapter should test for open between the TRS male collars and then continuity from the TRS pins to the RCAs to confirm one RCA is positive polarity and one negative and then label them. Make sure you turn on and power off the system sequentially to save thumps.