Equipped with the same ESS Sabre32 Ultra DAC technology found in numerous high-class audio interfaces, the M4 delivers an impressive 120 dB dynamic range at its main outputs. Premium ESS converters are also present on the headphone outputs, which feature separate headphone amplifiers. The crystal-clear preamplifier circuits achieve a measured -129 dBu EIN value on the microphone inputs, allowing you to record audio with unaltered authenticity. The M2 offers the highest speed for monitoring live inputs (microphone, guitar, or keyboard) through your computer, thanks to MOTU's specially designed USB drivers that enable class-leading, extremely low 2.5 ms round-trip latency (at 96 kHz with a 32-sample buffer). Please note: the MOTU M4 is Class Compliant, meaning that generally no driver installation is required on Mac computers. However, MOTU has programmed a high-speed driver that, once installed, allows for significantly faster latency than conventional Class Compliant interfaces. When recording and mixing, nothing is more important than achieving optimal levels. The M2 is the only audio interface in its class with a full-color LCD featuring clear, detailed level meters for all inputs and outputs. Utilize the professional volume control and feedback to fine-tune your sound perfectly. The M2 drivers provide convenient loopback channels to your host computer, allowing you to easily combine computer audio with live microphone and/or guitar inputs to stream the combined mix in real-time. Streaming and podcasting have never been easier or of higher quality than today.