The JBL's CONTROL 52 is a fashionable installation loudspeaker that generates high-quality audio from a compact shell and is sold as a pair. This passive speaker is designed to work with the C50 subwoofer and can be used in systems with two or four speakers. Contractor 40 series ceiling speakers can also be mixed and matched with the loudspeaker. A 2.5" driver with an efficient magnet structure, as well as a rubber half roll surround for improved bass performance, are included in the speaker. The voice coil is copper-clad aluminium wire on a vented Nomex former for great fidelity and reliability, while the copper-capped pole piece provides stable impedance and extended HF response. The speaker is versatile enough to function with 70/100V distribution lines and low impedance systems, and the accompanying wall mounting bracket allows you to position the speaker up to 45 degrees off-axis.