series one 100 and cab help

[shush]

Hi everyone,
This may seem like a stupid question I have a series one 100 head and have just bought a ht212 cab to go with it (was using a marshall 2 x 12 before) question is this: if i take 2 leads from the back of the amp into the two inputs into the cab what should I set the amps impedence selector to ?
Many Thanks in anticipation

[korek]

Hi,

If You using 2 speaker patches and HT212 is 8Ohm mono - 160W and 16 Ohm stereo - 2x80W then setup impedance to 16/4 Ohm on amp. If cab is second hand, worth to check speakers impedance as well.