After a two week's search I still can't find a straight answer as to how many ohms my Quantum can handle. Hopefully someone on here finds a free minute to answer a few questions. My particular amp has two speaker jacks on the back. Does this mean that the amp can be run at 4 ohms, and each jack is an 8 ohm jack? Also, can I run a power amp out of the "pre" jack? If so, can the power amp be run in conjunction with the Guilds power amp? My Regards.