A replier said something about a brand called "Schiit Audio", but I've researched them and they only offer stuff with RCA outputs which are sadly not balanced at all.

If you're on a budget you could get the AG03 which is the same interface, but with less input channels.

Also, the DSP is totally optional on those, If you don't use it you'll bypass it totally, not coloring or changing your signal in any way.

Btw you mentioned your speakers are Mackie, right? Before buying, research if your speakers actually support balanced input (they use XLR or P2/TRS "stereo" (2 black bands) for that, because each speaker is actually receiving 2 polarity-inverted copies of the signal). If all they have are RCA inputs (mono), you're out of luck.

Hope I could help!

EDIT: I have researched your monitors and they do have all three types of input: XLR and TRS (balanced) and RCA (unbalanced). yay \o/

Now go get yourself a nice audio interface with support for balanced output and go make yourself some nice XLR cables.

The Yamaha AG03 AG06 output balanced TRS signals, but for that extra "click" factor no the monitors I have built a custom cable that is TRS on the DAC and XLR to the monitors. That way it stays put :-)

Have a good one mate!