There are two ways to use the Torpedo C.A.B with an amplifier, either by using the FX send if your amplifier have a loop, or by using a 3rd party loadbox or a Torpedo Reload.
 

Using the FX send on the amplifier

Please note that some FX loops need the power amp section of the amp to be ON. In other words, you won't get any signal until the standby will be OFF. In that case, always connect a suitable load to your amp's speaker output (a loadbox or a cabinet).

Using a 3rd party loadbox or a Torpedo Reload

Please make sure to use the a loadbox without any speaker simulation, the signal you send to the C.A.B. has to be as clean as possible. Sometimes that kind of output is called "Uncompensated".

2- Effects routing

The location of your effects (pedals or multi-FX) is very important. You can follow the usual rules concerning the effects layout, with the ones that should be placed before a preamp (OD, fuzz, compressor...), or in the amp loop (time-based effects like chorus, delay, reverb...).

An interesting option is the possibility to place some effects AFTER the Torpedo C.A.B.. This is what we call the "studio setup" in the user's manuals: in a studio, most of the time, the time-based effects will be placed in auxiliary, meaning AFTER the miking, or directly in the DAW. This will lead to a cleaner sound of said effects, that will not be touched by any potenial modification like when they are in an FX loop (distortion and compression from the power amp stage for example). The other interesting option with putting the effects after the Torpedo, you can change the Mono output signal of the Torpedo into a Stereo signal (if you are using Stereo effects).

You will note that we put DI boxes after the Torpedo. It is very common to use DI boxes on line level products, especially on stage (even if it's not mandatory because the signal is strong and balanced), to prevent any phantom power supply to be sent from the mixer to your Torpedo (you should avoid that as much as possible). 

Two Notes AE would like to thank Cyril Cazin from Le Son Du Bout Des Pieds for the awesome connection diagram you can see here.