The EMM Labs MTRS is a stereo power amplifier from EMM Labs, built with an exceptionally wide rated bandwidth and high signal-to-noise ratio. EMM Labs is widely respected within the high-end community for its digital conversion technology, and this power amplifier extends that same measurement-focused engineering culture into the analogue amplification stage.
Key specs that matter
Input impedance is 100 kOhm balanced and 47 kOhm single-ended, an easy load for any preamplifier regardless of its own output impedance. Rated output is 400 W into 4 ohms. Gain is 30 dBu. Rated bandwidth is an extraordinary 0.1 Hz to 200 kHz, a figure that extends far beyond audible range at both ends, reflecting EMM Labs' characteristically thorough approach to engineering margin. Signal-to-noise is 120 dB with distortion at 0.01%. Damping factor is 200. At 544 x 584 x 297 mm and 82 kg it is an exceptionally large, heavy chassis, consistent with the substantial power supply and output stage needed to sustain such wide bandwidth and high output simultaneously.
Sound and use context
Expect a controlled, wide-bandwidth presentation typical of EMM Labs' flagship engineering approach - a house sound generally associated with exceptional transparency and detail retrieval, consistent with the brand's broader reputation in digital source components.
Pairing
The 100 kOhm balanced input impedance works with any modern preamplifier without gain concerns, so integration should present no particular challenge.
Alternatives
EMM Labs' broader DAC and preamplifier range forms natural partner components for a system built around this brand, worth pairing together for a coherently voiced, reference-tier signal chain. EMM Labs built its initial reputation specifically through digital conversion technology before expanding into amplification, and prospective buyers should note that the brand's core expertise historically lies in the digital domain, even though this specific power amplifier's measured figures suggest the analogue engineering team has applied comparably rigorous standards. The exceptional 82 kg weight and correspondingly large footprint both deserve careful consideration when planning where in a room this amplifier will actually sit. EMM Labs relatively compact dealer network compared with larger multinational brands means arranging an in-person audition may require more advance planning, though the brand loyal following within the high-end community makes such demonstrations generally worth seeking out.