These mixers also include dual DSP engines that allow multiple simultaneous effects assignable to any channel via aux 5/6. Onboard effects include reverb, reverb enhanced, delay, compression, expander, de-esser, chorus, flanger, tube emulator, vocal enhancer and gate. Chain two processors together on each of the two available effects windows. The digital output processing section includes Feedback Ferret®, dual 5-band Parametric EQ or dual 28-band Graphic EQs, digital delay lines, and dynamics/limiters. The output section can be configured for Stereo, Dual Mono or Subwoofer mode with a built-in electronic crossover. The mixer features dual USB 2.0 ports, and the "A" USB connector allows streaming of digital audio directly to a computer or memory stick as well as exclusive, built-in MP3 compression.