sE Electronics KLS 150 Studio Headphones

Studio Headphones with Adjustable Bass Control

The sE Electronics KLS 150 is a professional closed-back over-ear headphone engineered for critical monitoring, mixing, recording, and live sound applications. Unlike traditional studio headphones with a fixed sound signature, the KLS 150 lets you tailor the low-frequency response to suit your personal preference, application, or listening environment. A custom-engineered 40 mm heavy-duty dynamic driver with a neodymium magnet delivers powerful, detailed, well-balanced sound with exceptional low distortion. The KLS 150 is the right choice for audio professionals who need honest monitoring with the flexibility to dial in the low end on the fly.

What Makes the KLS 150 Stand Out

The headline feature is the mechanical Bass Control — the Bass Control knobs, protected by the interchangeable earcup covers, let you adjust the low end without DSP, batteries, or any active electronics. The dual-shell earcup design provides high passive isolation and minimal bleed, which is critical during tracking sessions. A 90° swiveling earcup makes one-ear monitoring effortless when you need to stay connected to your surroundings, while the locking detachable cable keeps the connection secure during long sessions.

Technical Specifications

Every spec on the KLS 150 is built around dependable monitoring performance, from the wide frequency response to the comfortable, road-ready construction.

• Driver: Custom 40 mm heavy-duty dynamic transducer with neodymium magnet
• Frequency Range: 12 Hz - 28 kHz — captures deep sub-bass and airy highs
• Impedance: 39 Ohm — easy to drive from laptops, interfaces, and mobile devices
• Sensitivity: 98 dB
• Max. Input Power: 1,600 mW — handles loud monitoring without distortion
• Construction: Closed-back, over-ear with dual-shell earcup design
• Weight: 335 g — light enough for marathon sessions
• Cable: Detachable locking 3 m cable with 3.5 mm, 6.35 mm, and USB-C adapters

Who Is the KLS 150 For?

The KLS 150 is built for studio engineers, producers, drummers, and live sound professionals who need a reliable closed-back headphone that adapts to different monitoring tasks. The mechanical Bass Control makes it equally useful for tracking bass-heavy sources, mixing on the road, or doing FOH and monitor work where the room changes from venue to venue. The plush memory foam and 335 g weight keep fatigue at bay during long sessions, while the foldable, swiveling design and included drawstring pouch make transport easy between studio and stage.