Hello there, some questions...

If I've understood this correctly the Opus has a maximum output of 2 VRMS, but is this per channel or total for the chip? Will balanced output in dual mono mode output 2 or 4 VRMS?

Secondly:

The Opus can supposedly with bypassed lowpass capacitors drive a Joshua Tree without a buffer, is this also true if the Opus is run in dual mono or would a buffer then be needed?

A little footnote, what eventually I'm planning to is a DAC to use with a subwoofer to handle 20-35 hz. If this DAC module is unsuited for this ( or less suited than another of your DAC kits ) me would be happy to know =)

Thanks in advance
Olle