My monoblock amp has two sets of speaker output terminals. Is this amp bridgeable?
No. Monoblock amplifiers have only one channel, so bridging does not apply. Many PG monoblock amplifiers provide two sets of speaker outputs for wiring convenience. The two outputs are internally connected in parallel. If both are used, a parallel connection of the two speakers will result. Two 4 ohm speakers become a 2 ohm load.