I cant find much on these, looks tempting on first glance. Here is CL ad.
Onix A2150 Amp and Hafler SE100 Pre-amp - $250
Both are high end pieces of gear that sound fantastic together. The Onix is a full dual mono amp with two power supplies etc... It puts out 120 watts into 8 ohms but with it's high current design feels much more powerful and will drive just about any loudspeaker. It is currently running a pair of notoriosly difficult to drive Magnepan Mg-1 speakers in a large room with the kind of poise expected from a well designed amp. The dual VU meters glow a soft blue which is a nice touch. The review below compares it to Creek and Krell.
The Hafler is an evolution of the famous DH110 but with JFET transistors. It is very lively and dynamic with lots of detail without sounding harsh or artificial. I am only selling this combination to fund a tube amp purchase.