What impedance Speakers can I use with the EDGE M?
You can use speakers with an impedance between 4-8 Ohms with the EDGE M. The EDGE M outputs 200W RMS into 8 Ohms and 350W RMS into 4 Ohms.
What amplification class does the EDGE M use?
The EDGE M uses Class XA amplification. For Class XA, the crossover point is moved so that both sets of transistors are always on until the signal reaches a loud enough level.
This means that for low level signals, the amplifier is essentially operating as a Class A amplifier and it is only when the signal is sufficiently loud enough that the transistors switch over. Any crossover distortion is therefore masked within the signal.