Meticulously engineered and redesigned from the ground up, the PRO 50 MK-4 carries forward the legacy of the original with groundbreaking enhancements. This fourth generation marvel combines audiophile grade performance with everyday usability in a compact 280mm cube, capable of seamlessly integrating into any system and room size – from compact satellite setups to full range floor standing speakers.
The PRO 50 Mk-4 is designed to make setup effortless, leaving the groundbreaking features accessible through the SR+ app. Thanks to its plug-and-play functionality, all you need to do is connect your LFE input and power it on. The subwoofer is pre-configured with an 80 Hz crossover and -40 dB gain, so you can immediately start enjoying deep, precise bass without any complex adjustments. It’s that simple. No complicated configurations, just seamless integration and unbeatable sound — right out of the box.
The PRO 50 Mk-4 takes user convenience and control to the next level with full app control, allowing you to fine-tune every aspect of your subwoofer's performance directly from your smartphone. With the intuitive SR+ App, available on both Google Play and the App Store, you can easily adjust settings for gain, phase, and crossover to match your system’s needs — all from the palm of your hand.
Wrapped in a refined Black Ash real wood veneer, the PRO 50 MK-4 is not only built to sound phenomenal but to look at home in any high-end setup. It delivers powerful, cinematic low end for the most demanding movie soundtracks and remains agile, tight, and nuanced for critical music listening.
This is not just a subwoofer—it’s a legacy redefined.
MJ Acoustics PRO 50 MK-4
25 years in the making. Designed for the next generation of sound.
150 -Watt Class A/B Mosfet
19Hz – 200Hz (-3db in room)
20Hz – 120Hz
With (200Hz Bypass)
10 Inch (250mm)
Ultra Long Throw
Heavy Duty Steel Basket
Dual high intensity full saturation magnets
Extended pole piece
High level : Neutrik speakon - Stereo Input
LFE : 1 x RCA (24 Karat Gold Plated)
LFE / Centre : 1 x RCA (24 Karat Gold Plated)
-99 – 0 dB
0 – 180° with 1° Increments
Smart Remote Plus App ( IOS / Android )
D.I.P. (Dynamic Intelligent Protection)
D.A.M.P. (Digitally Accurate Mirco-Processor) 3rd Gen
Auto On / Off Circuit (with sensitivity adjustments)
Multiple Simultaneous Input Use
Twin Independent Crossovers
18mm Acoustically Inert Veneer Balanced MDF
280 x 330 x 280mm (W x H x D)
13 Kg
Black Ash (Standard)
Custom Veneer (Additional Cost)
Custom Paint (Additional Cost)