The legacy of JBL's legendary 4310 and 4311 Control studio monitors is at the heart and soul of our Control Series Loudspeaker Systems. The Control Series is pure JBL, combining high performance, compact design and rugged construction into a line of loudspeaker systems with unprecedented versatility. The Control Series is also one of the easiest systems to install available anywhere. Perfect for applications where tight corners and tough angles are all too common, the Control Series features a wide variety of available mounting systems allowing enclosures to be easily positioned for optimum performance. Control 5 Compact Control Monitor LoudspeakerIdeal for portable studios and location recording or anyplace where space is limited.