The PMC10-4 is a single-cabinet active main monitor from PMC, the Biggleswade company that builds reference loudspeakers for music, film and broadcast studios. It was unveiled at NAMM in January 2026 as one of the four launch models of the Main Monitor Series, developed from the ground up and built in-house for the company's 35th anniversary. Its wide, low cabinet borrows the layout and look of the QB1, a PMC main monitor developed together with engineers at Capitol Studios.
Key specs that matter
Four 10-inch ultra-long-throw bass drivers work together with a PMC75v3 soft-dome midrange and a 34 mm soft-dome tweeter in a three-way layout. The bass section loads an ATL line with an effective length of 3.4 m, and PMC quotes a frequency response of 19.5 Hz to 25 kHz. Maximum continuous SPL is 116.5 dB and maximum peak SPL is 134.5 dB. Per channel the system delivers 5,600 W - 800 W for the tweeter, 800 W for the midrange and 1,000 W for each of the four woofers. The cabinet is 820 mm high, 1,040 mm wide and 523 mm deep, with an extra 10 mm for the woofer surrounds, and weighs 140 kg.
Engineering and use context
Each channel uses two outboard electronics units. The master36, a 3U rack chassis with 32-bit DSP crossovers and six Class-D amplifier channels, powers the tweeter, the midrange and the first pair of woofers. A power20, a 2,000 W Class-D amplifier in a matching 3U case, drives the second pair. PMC's proprietary masterlink connection ties the two units together, and an illuminated logo under the midrange reports system status. The new bass drivers use heavily vented motors, dual spider suspensions and triple-wound voice coils with up to 36 mm of linear excursion. LaminairX vents shape the airflow leaving the transmission line, while the n-compass waveguide around the midrange and tweeter controls dispersion through the crossover band. Excursion protection runs in the DSP.
Pairing
Signal can arrive as analogue or as digital audio up to 192 kHz, so the PMC10-4 needs only a mixing desk, interface or monitoring controller ahead of it. Crossover settings, delay, polarity and presets are handled over a network in the SoundAlign2 browser software from any computer on the LAN. For multichannel rooms, the series offers matching standalone subwoofers that reuse this driver and enclosure design.
Alternatives
The PMC QB1 is the earlier wide-cabinet main monitor, co-developed with Capitol Studios engineers, on which this design is modelled.