The Monitor Audio Bronze B4 speakers are 2.5 way floorstander because one of the two 6.5" bass units handles deep bass, while the other handles the upper bass and lower mids, crossing over to the tweeter at 2.6khz. The B4 stands 33.5" tall, and is 7.25" wide. The depth is 10". The cabinet has ports an both the front and the back. You can plug the rear port to increase bass extension. It has a frequency response of 36 Hz - 22 kHz and 150 watt peak power handling. It features an impedance level of 6 ohm and 91 dB sensitivity.