so that audio may be heard optimally in work centers with fluctuating ambient noise, including multitask areas, individual offices, departments and conference areas. Models feature a baffle mounted volume control knob, which can be removed to protect sound level settings from tampering and/or for aesthetic preference.  (less)

a stereo amplifier in one of the speakers (the master) which in turn connects by a cable to the other speaker (the slave). The amplifier utilizes two RCA audio inputs, a 1/4 inch input for the speaker cable, and a volume control knob. The Powerhouse speakers are easy to setup and simple to use! For the ultimate compact speaker where space is at a premium, the PH3-S is unbeatable. Optional accessories include two types of mounting brackets: C-Clamp style (MB-3) or swivel mount wall or ceiling bracket (SWB101).  (less)