Gsus4 Journal · Studio & recording
sE Electronics KLS 150: Headphones That Let You Set the Low End
Recording a vocal, practising through a modeller and checking a mix ask different things of your headphones. The KLS 150 brings an unusually useful adjustment to that routine: bass response you can set at the earcups.
In its introduction dated 16 October 2026, sE Electronics presents the KLS 150 as its move into professional monitoring headphones. It combines a closed-back design with adjustable Bass Control, aiming to cover studio sessions and live monitoring. Here is what matters when deciding whether it belongs in your setup. [1]
The defining feature
Bass Control: set it, then learn it
The control sits beneath each removable earcup cover. sE’s manual describes it as a passive, purely acoustic system; both earcups need the same setting. Refit the covers afterwards to protect the controls and achieve the intended isolation. [2]
For guitarists, this invites a useful experiment: play a familiar preset and listen to the weight of palm-muted notes, then check the same preset through your usual speakers. Settle on a headphone balance before changing the preset’s EQ. Otherwise, it becomes difficult to tell which adjustment helped.
Start with a repeatable reference. Use a few tracks you know well, keep the listening level consistent and note your preferred bass setting. Return to that setting before judging a new mix.
Where it fits in a working setup
The dual-shell earcups are designed to reduce surrounding noise and headphone spill. This is passive isolation, and its effectiveness depends on fit and seal. sE positions the KLS 150 for recording, mixing and live sound work. [1]
| Your session | A useful way to work |
|---|---|
| Vocals and acoustic recording | Record a short test with the click running. Listen back for spill before committing to a full take, and adjust the cue level if needed. |
| Guitar and bass practice | Use your modeller’s or interface’s headphone output. Check the balance between your instrument and backing track before editing tones. |
| Editing and mix checks | Compare your work with a level-matched reference track. Check important balance decisions on another playback system as well. |
The details you notice after an hour
The KLS 150 uses memory foam and leatherette pads, with a folding design and earcups that swivel through 90 degrees. Glass-fibre reinforced parts, spring-steel components and headband reference marks round out its practical construction. [3] [1]
When auditioning headphones, wear them as you normally work—including glasses if you use them. Move your head, check the seal and give yourself time to notice pressure around the ears. Comfort is personal, so a quick listen only tells part of the story.
Connect to the rig you already use
The KLS 150 includes a 3 m straight cable with a locking connection at the headphones. The package also includes a 3.5 mm to 6.35 mm screw-on adapter, a 3.5 mm to USB-C adapter, an earcup opening tool and a drawstring pouch. [3]
At a recording desk, connect to the interface’s headphone output and start with its level turned down. For a phone or tablet, check compatibility with the included USB-C adapter. Keep enough cable slack to move comfortably, with the spare length away from your chair wheels.
KLS 150 specifications at a glance
| Specification | Manufacturer’s published figure |
|---|---|
| Design | Closed-back, around-ear |
| Driver | 40 mm dynamic; neodymium magnet |
| Frequency range | 12 Hz–28 kHz |
| Impedance | 39 Ω |
| Sensitivity | 98 dB; reference conditions not stated |
| Maximum input power | 1,600 mW |
| Weight without cable | 335 g |
Figures from the official user manual. A frequency-range specification alone does not describe tonal balance. This guide is based on published information; Gsus4 has not independently measured or auditioned the KLS 150 for this article.
Before you choose
Does it have active noise cancellation?
No. Its isolation comes from the closed-back construction and earcup seal. [1]
Are the coloured covers included?
The product page lists optional coloured earcup covers as coming soon. Treat those as a future accessory, rather than an included choice of colours. [3]
Sources and verification
- [1] sE Electronics introduction — dated 16 October 2026.
- [2] Official KLS 150 user manual — operating instructions and specifications.
- [3] Official KLS 150 product page — features, accessories, imagery and video.
- Sweetwater product listing — additional retailer reference.
Checked 19 October 2026. Local pricing and availability are not inferred from overseas listings.
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