Component speakers are the building blocks of installed and desktop sound: computer speaker sets, bookshelf and wall-mount units, in-ceiling speakers for rooms and paging, and the replacement drivers and satellite units that keep existing systems whole. They serve everything from a single desk to a building-wide install.
Buy by where the sound has to land. Desktop sets are judged at arm's length; room and classroom speakers by coverage at the farthest seat; installed and paging speakers by how many a zone needs and what the amplifier behind them can drive. The electrical match matters for installed work - impedance and power handling must agree with the amplifier, and constant-voltage paging systems use different speakers than ordinary stereo lines. Mounting and wiring are part of the order, not an afterthought. COLAMCO quotes speakers from single rooms to campus paging for business, government, and education facilities.