Legacy Wavelet which at full use is a DAC, pre-amp and RoomEQ is an outstanding example. It can also be utilized only as a RoomEQ device with your own DAC and Pre-amp in front of it. I've used it twice now with 2 generations of Legacy speakers with great results. I have heard that Bill is starting to open up its use (or will) to pair with other speakers. Best to talk to Legacy direct about this and see where they are with this.