Most modern installations for digital signage,corporate boardroom audio system, classroom audio systems,retail merchandizing kiosks, etc.need a compact and robust audio amplifier that is easy to hide.The SIWA-236™ is a very good fit for such applications as it can be installed in a standard single-gang junction box.If offers audiophile quality of high-performance,high-efficiency 36 watts of clean power into speaker loads as low as 4 ohms, allowing the installer to connect multiple speakers to the same amplifier. This small yet powerful package delivers true high-fidelity performance that actually rivals the sound quality of large stand-alone mono-block amplifiers.Its mono-block amplifier design provides extremely clean state-of-the-art power and unprecedented sound depth and musical clarity. The amplifier has a 26dB gain, thus an external preamplifier like the PreAmp9™ can be used to boost the input signal when using modern audio sources such as computer sound card output,portable CD players, MP3 players, satellite radio receivers, HD music servers, Digital Signage players, etc.This miniature yet powerful package delivers high performance and quality at an affordable price. The unit accepts a line level audio signal on gold-plated RCA phono input jacks on the front panel and provides amplified signals on pigtail speaker wires in the back.The advanced protection circuitry guards against system damage from overload, over-temperature or short circuit load. The unit operates from a regulated 13.8VDC high-efficiency switching power supply which is included in the package. Pragmatic offers high quality digital amplifiers that contain numerous advantages over the competition.The Pragmatic amplifier boasts high efficiency and spread-spectrum high clock frequency. It also has very linear gain and phase characteristics.The amplifier has a flat frequency response from 10 Hz to 50 kHz. There is no ripple in the pass band and very low change in distortion versus out power levels (usually between 0.01 and 0.05%).It maintains very low and uniform distortion on all frequencies and very high signal-to-noise ratio and dynamic range.