Introducing the M4 Best in class o quality, speed, and metering o Quality Equipped with the same ESS Sabre32 Ultra™ DAC Technology found in o interfaces costing thousands, the M4 delivers an astonishing 120 dB Dynamic Range on its main outputs. ESS converters also drive the headphone output, which rivals dedicated headphone amplifiers costing hundreds. Ultra-clean preamp circuits produce a measured -129 dBu EIN on the mic inputs. Capture and monitor your o with pristine clarity. & 9745; ESS Sabre32 Ultra™ DAC technology for superb analog sound & 9745; The same converter technology used in o interfaces costing thousands & 9745; Measured 120 dB dynamic range on outputs & 9745; Measured -129 dBu EIN on mic inputs & 9745; ESS-driven headphone output Speed The M4 provides best-in-class speed for monitoring live inputs (mic, guitar or keyboard) through your computer, thanks to MOTU's expertly engineered USB drivers, which deliver class-leading, ultra-low 2.5 ms Round Trip Latency (at 96 kHz with a 32 sample buffer). Metering When recording and mixing, nothing is more critical than achieving optimum levels. The M4 is the only o interface in its class with a full color LCD featuring clear, detailed level meters for all inputs and outputs. Enjoy professional-level volume control and feedback to get your sound just right.