Highly Efficient Mixer Amplifier are a professional tool with a sleek industrial look that is designed and built for commercial sound applications. They are highly efficient, fanless and just 1U rack space high. They offer unmatched ease of use, with a clean, front panel featuring only volume controls for each channel, master volume adjustment, adjustable bass and treble controls and a power switch. All the volume controls are surrounded by an illuminated ring, making them easy to see and operate in darkened environments. Their highly efficient DriveCore design reduces power consumption and yields much more efficient operation -- up to 80 percent more efficient than previous designs.