The stated impedance is 4 Ohm - however, TC Electronic they say they are confident that you can connect 3 of THEIR 8 Ohm cabs
Because the impedance of other manufacturers cab can vary from the published, they don't recommend doing that with any other make of cab.
[quote name='stevie' post='1178909' date='Mar 27 2011, 10:29 PM']What is the lowest impedance the TC Electronic 450 amp can handle? I know what the official line is, but has TC actually explained why the amp is OK with 3 of their 8-ohm cabs?[/quote]