You cannot hook two amps to a single set of speaker terminals because the amps will see each other and usually blow up, blow fuses, or go into protection. If you speakers have biwire terminals and you remove the jumpers then you can safely hook up an amp to each pair of terminals.

Can I daisy chain amplifiers?

Daisy-chaining guitar amplifiers is certainly possible. The simplest way to achieve this is by connecting the guitar to the input of one amp, then outputting the signal to the input of another amp. Daisy-chaining guitar amplifiers is essentially the process of sending the guitars output to multiple amplifiers.

What is the benefit of bridging an amp?

Bridging an amplifier increases the power that can be supplied to one loudspeaker, but it does not increase the amplifiers total available power. Because a bridge amplifier operates in mono mode, a second identical amplifier is required for stereo operation. For bridged amplifiers, damping factor is cut in half.