JBL Professional C2PS Control 2P Compact Powered Monitor, pair (master and extension speakers), Black Includes 1x powered master speaker and 1x passive extension speaker Studio quality transducers for accuracy, and rich bass response: 80 Hz - 20 kHz 35 Watt per-channel power amplifier and high sensitivity drivers produce exceptional output: 115 dB max SPL per pair Balanced XLR, , and unbalanced RCA inputs allow connection to a range of signal sources Stereo headphone jack allows monitoring using headphones Ergonomic, side-mounted volume control Magnetically-shielded transducers for use near CRT monitors and magnetically sensitive equipment Internal peak limiter and overload protection circuit - protects the system from damage caused by continuous over-driving Included snap-on pedestal to optimize listening angle for desktop applications Wall-mount capable using optional JBL mtc-2p mounting kit (sold separately)