The Pure Resonance Audio LA21000 is a powerful and efficient 2-channel rack mount amplifier that operates at low impedance. This compact and lightweight stereo power amplifier is housed in a rugged 1U 19" rack-mounted chassis. Combining a robust 1000 watts of Class D power with a switched-mode power supply allows for a lighter-weight unit, enhanced efficiency, and ensures stable and continuous operation. With XLR inputs, LINK, and SpeakON NL4 outputs, the LA21000 accommodates 4Ω or 8Ω in mono or stereo mode, as well as 8Ω or 16Ω bridged, catering to various live and installed applications. The LA21000 is an economical and reliable professional power amplifier that provides exceptional performance, durability, and sound quality.