Some of the Mc amps are mono bridge and some are mono parallel. For modern (i.e., low impedance) speakers, the latter is the clear and obvious choice. Lucky for you, you have mono parallel switched amplifiers. Monoblocking will give you vast improvements in all aspects of sound quality compared to a single amp, IMO.
Also, be sure to try the high sensitivity switch. Moving it from 2.5V to 0.75V will improve dynamics and detail by a considerable amount in many cases. Just be sure to turn your preamp volume all the way down before turning everything back on because they will play much louder than before.
Play with the gain controls too. I had a 2125 that sounded best with them all the way up but I've since heard some that sounded best at like 2:00. Experiment and see what you get.
Enjoy your new amps! They will sound incredible once you figure out the right settings.
Arthur
Also, be sure to try the high sensitivity switch. Moving it from 2.5V to 0.75V will improve dynamics and detail by a considerable amount in many cases. Just be sure to turn your preamp volume all the way down before turning everything back on because they will play much louder than before.
Play with the gain controls too. I had a 2125 that sounded best with them all the way up but I've since heard some that sounded best at like 2:00. Experiment and see what you get.
Enjoy your new amps! They will sound incredible once you figure out the right settings.
Arthur