To say I'm bown away would be an understatement, Its taken the standard Nord One NCore NC500 (pretty much same sound as the NCore NC400) to another level. The standard version is superb, highly powerful and acurate and equualed the Abrahamsen beacuse it was different more powerful, cleaner. If you asked me to sit in an average room which you would listen to for hour on end I would pick the Abrahamsen, full stop. Not now, after trying the new input buffer board. We tried both