Pair of3 8 OHM Low Profile Ceiling Speakers PLEASE NOTE This listing is for a 2x pair of speakers (4 speakers). Packs of 2 are also available.Technical Specification: Woofer Size 75mm (3 ) diameter Frequency Response 200Hz-20kHzImpedance 8OhmsMax Power 20WRMS Power 10W Mounting Depth 57mmDimensions 57mm x 100mm Weight 0.36kg EachCut-out in Ceiling/Wall Required 90mmSupplied in Pairs Efficient two-way crossover Gold-Plated Spring TerminalsFlared Baffle for wide dispersionExtremely low profile for a sleek and contemporary lookSupplied with 3 Way Dog Ear Mounts for easy mounting. Overview:A 2-way ceiling speakers which is ideal for use as main or surround sound speaker in the wall or ceiling. The concentric directional tweeter allows the higher frequencies to be focused at the listener to help create a better soundstage. This speaker can be used in Low Impedance systems but are not compatible with 100V line systems. 8Ohm Systems:1). If you have an 8 Ohm amplifier, up to1 pair of speakers can be used (2 speakers).2). If you have a 4-8 Ohm amplifier, up to 2 pairs of speakers can be used in parallel (4 speakers).3). If you have a 2-8 Ohm amplifier, up to 4 pairs of speakers can be used in parallel (8 speakers). Fitting easy to install, the speakers are supplied with 3 way dog ear mounts and flush / extremely low profile flat mesh grilles for a sleek and professional finish