Since I run a 3 cabinet system I will spout off on this. Your amp is not stable at 2Ohms. Hence the 4/8Ohm option. Putting your 3 cabients onto your amp will or may work for a bit, but it will eventually damage the amp and the cabients. Like was earlier stated, with 2x8Ohm and a 1x4Ohm cabinet, you are working with 2Ohms which your amp will not support. Even if you were to rewire your Traynor to 16Ohms, that would give you like 3.3Ohms and your amp still will not support that. Really, your best option is 2x8Ohm cabinets or 1x4Ohm cabinet.
