JBL Professional C2PM Control 2P Compact Powered Monitor, Master Speaker Only, BlackStudio quality transducers for accuracy, and rich bass response: 80 Hz - 20 kHz35 Watt power amplifier and high sensitivity drivers produce exceptional output: 111 dB peak SPLBalanced XLR, ¼”, and unbalanced RCAinputs allow connection to a range of signal sourcesStereo headphone jack allows monitoring using headphonesErgonomic, side-mounted volume controlMagnetically-shielded transducers for use near CRT monitors and magnetically sensitive equipmentInternal peak limiter and overload protection circuit - protects the system from damage caused by continuous over-driving