sE Electronics has introduced the KLS 150, a pair of closed-back monitoring headphones with adjustable bass response. The manufacturer’s announcement is dated 16 October 2026 and positions them for recording, mixing and live monitoring.
The feature that deserves attention is the Bass Control on the headphones themselves. That gives a performer or engineer another way to change the low-end presentation without reaching for an EQ in the session. It also creates a decision worth making deliberately: which setting are you using as your reference?
Bass adjustment, with covers to protect the setting
According to sE’s announcement, the interchangeable earcup covers help protect the bass controls against accidental movement. The design also includes a custom 40 mm transducer, dual-shell earcups and a detachable locking cable. Listed weight is 335 g.
A cue mix for tracking and a reference for judging a bass line need not serve the same purpose. A singer might want more low end while performing; an engineer comparing the mix with familiar records needs a response they recognise. Changing the setting between those jobs is useful in principle. Changing it halfway through a tonal decision could make the comparison harder to follow.
For a practical audition, choose a few reference tracks you know well and keep the playback level consistent. Check the same passage after adjusting the bass, then return to the original setting. That tells you more about the change than immediately turning up the kick in your own session.
Isolation is a claim to check in context
sE describes the dual-shell construction as providing passive isolation for tracking and live monitoring. We have not tested the headphones, so this announcement is not a verdict on leakage, comfort or tonal balance.
During a recording session, listen for spill at the actual cue level and with the microphone positioned as it will be for the take. A comfortable seal matters too. A quick fit check is worth doing before deciding whether a closed-back pair suits your performer or your own long editing sessions.
Our article on AIAIAI EQ Machine covers a software approach to headphone correction. Our coverage of personalised headphone monitoring looks at another approach. Neither is a compatibility claim for the KLS 150.
Connections and local availability
sE lists a 3 m straight cable, a screw-on 3.5 mm to 6.35 mm adapter, a USB-C adapter, a cover-opening tool and a drawstring pouch in the box. Australian pricing and local stock timing remain unconfirmed here. Check those details with a local dealer before planning a purchase around a session.
