Solid Drive 50 Watts Per Channel Class D Amplifier The Solid Drive SD-250 is an ultra compact 2-channel amplifier with extra heat sink surfaces for extended duty at full power. The amp is rated at 50 watts per channel and can run in stereo, mono, or bridged mono. But most importantly it has custom electronic EQs for glass, sheet rock, wood, or bypass. Having the correct power and the right EQ will make the AD sound its best. The amp can utilize balanced stereo euro block, stereo unbalanced mini jack, or high level euro block inputs. The SD-250 is 50-watt per channel (4 ohm) Class D amplifier with maximum gain of 34 dB. The amplifier has built-in, selectable equalization settings for use with the Solid Drive products on wood, glass, drywall and flat setting. Input options include balanced stereo euro block, unbalanced line level mini jack, and a stereo speaker level (amplified) Euro block input for applications with low wattage speaker outputs. The SD-250 has three operating modes: stereo, dual mono, or bridged mono. In stereo, each input channel flows directly to its corresponding output channel. In dual mono, the left input is fed to both output channels. In bridged mono, the left input is fed to the bridged output. System includes selectable 12-32 v external trigger input or auto standby to conserve energy. Applications Small, powerful and cost-effective, the SD250 is engineered for external amplification with Solid Drive transducers.