I just bought a new (used) amp. It is a Dynacord reference 4000. It's rated 420 watt @ 8 ohm. It is also biampable: 2 channels (210 watt each), selectable crossover frequency. It can also store a lot of settings through midi. I do not intend to use the biamp-mode (yet..maybe later) but i do wonder if it can handle a 4 ohm load... can someone tell me?