The Mackie TH12A was designed specifically to deliver great midrange response. This means that it does an excellent job pushing out crystal-clear vocals and guitars. Keyboards and acoustic piano patches also benefit hugely from the carefully balanced frequency output of the TH12A powered speaker. The amplifier employs Mackie's proprietary Class-D Fast Recovery amplification, with 400 watts of total system power. These amps are custom designed as a perfect sonic match to the 12-inch high-precision neodymium LF woofer and 1-inch HF compression driver tweeter. The overall design is true 2-way bi-amplified sound, with separate amps powering each cone inside. Each TH12A has a single balanced XLR line-level input.