Alesis Monitor One (M1) MKII Active | Audio Forums
Repairing Alesis M1 Active mk2 Monitor Speakers « Keith's Electronics Blog
Alesis M1 Active MK3 - Premium 65 W B-Amplified Active Studio Monitor with 5-Inch Aluminium Driver, 1-Inch Silk Dome Tweeter, Optimised Waveguide and XLR/1/4-Inch Combo Inputs: Amazon.co.uk: Musical Instruments & DJ