How I connect head to cab? (pic inside)

[alonl6]

I used to play combo before.. I read horror stories about ohms and blowing up your amp
is this right? I mean, the amp works fine so far.
pic (ignore the erotic warning ) https://imgur.com/a/zPiU0yJ

[donkey tugger]

Should be in the 1 x 8 ohms slot on the amp (usually the left one if it's mono operation like this)!

[zerocrossing]

Middle two from the power amp into left and right and switch to stereo.

[BertKoor]

Tube heads are sensitive to have their speaker impedances matched up indeed. It won't blow up immediately, but I suspect one of my tube heads sounds like a wood fire when the guitar is silent, due to having a not ideal impedance cabinet connected to it. One of my cabinets is supposed to have 4x 16Ohm speakers. But one is replaced by a 8 Ohm I had lying around, which makes the total impedance around 13 Ohm. Oh well..

Did you know you can attach pictures here as well? Yours was just a tiny bit too large.

EnglCabinet.jpeg

Anyway, you cabinet can be used mono or stereo.
The label on the back says: 8 Ohm @ mono - 16 Ohm @ stereo.
I see you have one speaker lead, so you're going for mono.
That would be either one of the middle "1 x 8 Ohm" outputs of the amp.

When two cabinets are plugged in to the same output of the amp, the resulting impedance is half of that of a single cabinet. So if you have two cabinets of 8 Ohm each, these need to be plugged into the 4 Ohm output of the amp.