3 Series MkIII - Powered Studio Monitors
*Available in the US & Canada January 7th, 2027
JBL 3 Series MkIII is a major overhaul of the 3 Series platform, combining new drivers, redesigned JBL Image Control Waveguide, a front-firing bass port utilizing the patented JBL Slipstream port design, a new Class D amplifier, and 81 room EQ combinations. The 305P, 306P and 308P monitors are designed for use on desktops and monitor stands, with high output and exceptional stereo imaging. The 310S MkIII subwoofer adds extension down to 26 Hz and flexible crossover controls for 2.1 configuration, as well as surround and immersive systems. With included mounting points on every full-range monitor, 3 Series MkIII is built for modern production and scales up to any studio configuration.
3 Series MkIII Products
A Major Overhaul
Every major component has been reimagined with all-new features engineered around your needs. From redesigned drivers and the JBL Image Control Waveguide to a patented Slipstream front bass port, 81 room EQ combinations, a new Class D amplifier, and integrated mounting points, the JBL 3 Series delivers greater accuracy, control, and flexibility.
Wide Stereo Image
Experience pinpoint detail across a wider listening area with all-new high-frequency drivers and JBL's renowned Image Control Waveguide, delivering consistent coverage, precise imaging, and the confidence to make accurate decisions from virtually any position.
Cleaner More Predictable Bass
Experience deeper, cleaner bass with greater accuracy through redesigned woofers and JBL's patented front-firing Slipstream port, reducing low-frequency distortion while delivering controlled, predictable performance near walls, on desks, and in tight spaces.
Room setup made simple
Achieve accurate sound in virtually any space with four one-touch EQ controls offering 81 room correction combinations, compensating for speaker placement, boundary distance, and high- and low-frequency response.
Scalable to Immersive
Grow your system as your needs evolve with optional subwoofer support for deeper bass extension, consistent family voicing, and integrated mounting points, making it easy to expand from stereo to 2.1, surround, and immersive monitoring.
1. New tweeter design
Extended high frequency response above 30 kHz for better accuracy in the mix
2. Re-designed waveguide
Based on JBL M2 patented Image Control Waveguide with wide sweet spot for improved stereo imaging
3. Re-designed Class D amplifier
Featuring lower noise and higher output for more transparent audio processing
4. Advanced woofer design
For higher output, improved power handling and extended low frequency extension
5. JBL's patented Slipstream port design
Less distortion, predictable low frequency performance and less bass build-up near walls
6. Corrective EQ control
Helps compensate for issues with room acoustics
