Z3ta+ 2.0 test request.

I'm looking at getting this upgrade, but before I do can somebody who has it perform a little test for me?

1) Initialize a fresh patch.
2) Add a single voice of type SINE (synced sine if possible).
3) Listen to playback using a low octave bass line, anywhere between c0 and c2, perhaps a run from top to bottom.
4) Answer the following question...
 
Is it still audible or did it lose volume the lower you went?
 
I've yet to find a synth that does sine's well in low registers, but if I find one, it'll be an inst-buy.
 
Thanks for the time spent performing this test, if you choose to do so.