Introducing the all new SSA DM100.4 amplifier. An old school approach, with updated components, for the most discerning of ears. If your front stage is lacking warmth and clarity, its time to upgrade. Our first 4 channel amplifier in our high-end, sound quality, Class- A/B - Demon amplifier line. The SSA DM100.4 is the elite choice for that high end active front stage, premium passive components, and especially a sound quality sub (SSA Demon in a 3-way set up). Stellar looks to match the design and components. Don't let your speakers or your ears down, #levelup to the all new SSA DM100.4 amplifier.