ATC SCM45A PRO [PAIR]Mid size very high performance active 3 way studio monitor Ideally suited to: critical near field listening applications in all control rooms LCR surround monitoring in medium control rooms surround channels in medium to large contol rooms ATC hand built 6. 5 164mm carbon paper cone bass driver. ATC 25mm 1 Dual Suspension S Spec Tweeter Discrete MOSFET class A B tri amp pack with 150W 60W 25W continuous power output Drivers: HF 1 25mm Dual Suspension