CSA140Z 70V Amplifier + (4) MS81 Metal Ceiling Speakers

This package pairs the JBL CSA 140Z 40W Commercial 70V Amplifier with 4 Rockville MS81 8" 70V/25V Metal In-Ceiling Speaker speakers, giving offices, schools, and retail floors needing background music and paging a complete 70V sound system without sourcing amp and speakers separately. The JBL CSA 140Z anchors the system with a single 40W channel built on Crown's DriveCore technology, which replaces hundreds of discrete parts with one chip to cut down on points of failure while keeping the sound clean. Built-in 70V and 100V operation lets it power a distributed system straight out of the box, and a universal power supply accepts 100 to 240 VAC so it works on nearly any electrical service. The fanless 1U rack design stays quiet enough for a dining room, and a sleep mode disable function keeps the amp always ready for paging or background music. The package also includes the 4 Rockville MS81 in-ceiling speakers, built with a metal housing that blends into a standard ceiling grid. A front-facing volume knob is camouflaged into the grille, so power can be tweaked without pulling the speaker down, and an 8-ohm transformer bypass covers standard 8-ohm applications alongside 70V and 25V taps. The 8" cone moves more air than a 6.5" or 5.25" option, giving it a deeper bass response for retail floors and school hallways. Because both pieces are matched for 70V operation, wiring the 4 speakers to the amplifier is a matter of running positive and negative leads with no impedance math, and the amp's power still has headroom for expanding the zone later.