@ surfmuz Interested to hear your review. As an owner of a pair of 901's, I have no doubt you will love the sound and experience of the 451's. There's a huge difference in power between the M8's and 451's however. I'm curious to learn how this difference in power affects your system. The hybrid Mac amps sound incredible and integrate very well. It's actually amazing how well the two amp sections blend. I've put together a couple dozen different bi-amp configurations over the years and none have come close to the 901's in integration and performance. I've used the internal crossover and run w/o as two separate full range amps with excellent results either way. Currently using the internal crossover to Analysis panels with no passive crossovers in line.
