Re: Deacy Amp
If it doesn't have an external speaker jack on the amp, you'd need to pull the wires off the speaker and attach them to a female jack. Then use a speaker cable to connect it to the cab.
If you're using another amp as a slave amp, you'd use the Deacy's DI output, into the FX return of your slave amp, and plug that one into the 2-12 cab.