Originally Posted by holland
From AMB's Beta22 "other options" page.
Unfortunately, this is not quite the same situation. In AMB's case there is just ONE ground channel for both outputs. In the CTH there are, effectively, TWO ground channels and they are built in to the amp. How well the channels match depends on two things:
1. What the exact LV is. There is variation in regs and they will not be the same. This matters because the LV determines the OG (ground channel) voltage.
2. The actual splitter behavior (mostly determined by the TLE). These devices have tolerances too and they don't exactly split the rail in half.
So, the OL and OR or each amp will match the OG. Two amps tied together will have a DC offset across the headphones determined by how far apart the two OG's are.
This is not to say that it can't be done, only that some matching may be required.
If you guys really want a balanced version the designer should design one.