Just noted that the pro bias of my srm-t1 is 366 volts and the normal bias is 176 volts. Any thoughts?
Here the multi-meter is by the way: http://www.extech.com/instruments/resources/datasheets/MN25_MN26.pdf
DC offset is 2v and 8.5v, measured between the channels. 1.1v and 8v between + and ground. Should I adjust the offset?
You can't directly measure the bias because there is a large series resistance with it, and that acts as a divider with the resistance in the meter. You need a high impedance meter (ideally an electrostatic volt meter), or knowing both the impedance in the amplifier as well as in the meter and doing the math.
As for the offset, I personally wouldn't care about numbers that low. You certainly could adjust it, though.