Description
The Miller & Kreisel (M&K Sound) S150 THX Ultra is a legendary loudspeaker that has earned its reputation as a reference monitor for both professional studios and serious home cinemas.
Designed with a singular focus on accuracy and cinematic realism, it delivers the kind of sound engineers rely on when mixing films—and home enthusiasts crave when recreating that experience.
The S150 is a sealed, compact LCR (Left–Center–Right) speaker engineered to meet THX Ultra standards, ensuring it can fill larger rooms with clean, consistent sound at true cinema levels. It’s not designed to impress with exaggerated bass or warmth—instead, it aims for absolute fidelity to the source.
What makes the S150 instantly recognizable is its unique driver configuration:
Triple tweeter array
- Three high-frequency drivers arranged horizontally create a wide listening window and ensure consistent high-frequency detail across multiple seats. This design minimizes vertical dispersion to reduce unwanted reflections from floors and ceilings.
- Dual midrange drivers
Positioned around the tweeters, they provide:
- High output with low distortion
- Exceptional vocal clarity
- Seamless integration through the critical midrange
- Sealed enclosure (acoustic suspension)
Unlike ported speakers, the S150 uses a closed-box design, which delivers:
- Fast, tight transient response
- Precise, controlled bass
- Excellent integration with subwoofers
MILLER & KREISEL SOUND S150 THX ULTRA SPEAKERS
The legendary S150 is the culmination of more than 40 years of loudspeaker design and acoustic solution for any critical audio and video recordings. What this updated version of the legendary studio monitor does in the conveyance of exactly what is there in the recorded source, no more and no less, is difficult to formulate in just a few words. Essentially, it does pretty much nothing, except open up a wide, clean, clear window on every aspect of recorded sound, allowing you to shift your personal focus as you choose between specific details, instruments or voices, while never losing sight of the totality of the overall musical experience.
Specifications
Sound
Impedance
4 ohm
Recommended Amplifier Power:
25-500W
Bass/Midrange:
2 x 5,25” Fiberglass
High Frequency Driver:
3 x 1.1” Soft Fabric Dome
Frequency Response:
75 Hz – 20KHz +/- 3dB
Sensitivity:
92 dB, 2.83V1m
Dimensions
Dimensions HxWxD:
31,8 x 26,6 x 30,8 cm / 12,5 x 10,4 x 12,2”
Weight:
11.5 kg / 25.4 lbs
Colors
Finish: Black satin
