Hear the details, control the low end and stay comfortable through extended sessions. The sE Electronics KLS 150 professional monitoring headphones combine a closed-back, over-ear design with a custom-engineered 40 mm transducer for critical monitoring, mixing, recording and live sound. Their balanced response and low distortion are designed to provide detail across a mix, while adjustable Bass Control lets you tailor the low-frequency response for different material, applications or listening preferences. A dual-shell earcup design provides passive isolation to reduce outside distractions on loud stages and help limit headphone bleed around open microphones during recording.

Adjustable Bass Control Helps You Shape the Low End

The custom 40 mm transducers are engineered for powerful, controlled bass reproduction without sacrificing detail across the rest of the frequency range, helping engineers and musicians evaluate low-frequency decisions with greater confidence. Integrated Bass Control provides hands-on adjustment of the low end, allowing the headphones to adapt to different monitoring situations or personal preferences. Interchangeable earcup covers provide another layer of customization while also protecting the Bass Control knobs against accidental changes once a preferred setting has been established.

Memory Foam and Passive Isolation Support Long Sessions

Premium memory foam conforms naturally around the head, while leatherette ear pads create a comfortable seal and distribute pressure for extended recording, editing and mixing sessions. The dual-shell earcup construction reinforces that seal for effective passive isolation, making the KLS 150 suitable for both studio tracking and monitoring in louder live environments. Earcups swivel 90 degrees for convenient single-ear monitoring, while multiple folding configurations simplify storage and transport between sessions.

Road-Ready Construction and Practical Accessories Complete the Package

Glass-fiber-reinforced construction provides strength while keeping the headphones to 11.9 oz., and corrosion-resistant spring-steel components are designed for dependable professional use onstage, in the studio and on the road. Laser-etched adjustment markings make it easier to return to a preferred fit, while the detachable locking cable helps maintain a secure connection and can be replaced when necessary. The included accessories comprise a 10' straight cable, 1/8"-to-1/4" screw-on adapter, 1/8"-to-USB-C adapter, earcup-cover opening tool and protective drawstring pouch. With adjustable bass response, passive isolation and a versatile design, the sE Electronics KLS 150 studio closed-back headphones offer practical monitoring flexibility for musicians and audio professionals.