The Monitor Audio Pro-80LV Trimless In Ceiling Speakers (Pack of 4) is the ideal solution for installations thanks to its discreet design & high-quality audio that remains intelligible for both public addresses & ambient music. The Pro-80LV features an internal matching transformer that provides a 70V or 100V input for powering multiple speakers on one amplifier channel. A 16ohm switch features that offer versatility to wire one two three or four speakers in parallel per channel. With the robust build high-performance quality & trimless aesthetic the Pro-80LV is the perfect choice for your installation.