Teenage Engineering EP-133 K.O. II firmware

Teenage Engineering active Released 27 Dec 2023
sampler drum-machine

Latest firmware: 2.5.1

2.5.1released 3 Jul 2026

What's new in 2.5.1

fix: crash when cropping long samples. fix: GROUP+PAD shortcut broken in TEMPO. fix: choppy USB audio when streaming from Android devices (e.g. Pixel 9).

Last checked 11 Sep 2026

Download 2.5.1 from Teenage Engineeringopens in a new tab — teenage.engineering

How to update the Teenage Engineering EP-133 K.O. II

Update only via browser updater, no directly downloadable file.

What you need

Browser updater (Chrome/Brave) — the software Teenage Engineering uses to load firmware onto the Teenage Engineering EP-133 K.O. II. Download links below.

Just for reference. For complete and up-to-date instructions, always refer to the manufacturer's official firmware page.

Drivers & software for the Teenage Engineering EP-133 K.O. II

The Teenage Engineering EP-133 K.O. II is updated with Browser updater (Chrome/Brave), published by Teenage Engineering.

Download Browser updater (Chrome/Brave) from Teenage Engineeringopens in a new tab — teenage.engineering

Get Teenage Engineering EP-133 K.O. II firmware alerts

We check Teenage Engineering's official download page every day. Sign in and we'll tell you — by email, Telegram or push — the moment a new Teenage Engineering EP-133 K.O. II firmware ships. One message per release.

Continue with Google Continue with Apple

Signing in sets up firmware alert emails for your rig — you can switch them off at any time. One notification per release. No spam, no newsletter.

Sign in to see Reverb prices

Continue with Google Continue with Apple

Teenage Engineering EP-133 K.O. II firmware update history

Changelogs summarised from the manufacturer's release notes.

Version 2.5.1 — 3 Jul 2026

Release notes for this version are listed above.

Release notesopens in a new tab — teenage.engineering

Version 2.5.0

- summer 2026 update
Release notesopens in a new tab — teenage.engineering

Version 2.0.5 — 3 Dec 2025

- improved audio stability to reduce glitches. - restored SYNC OUT continuous clock output. - fixed: bug fixes and performance improvements for EP SAMPLE TOOL. - fixed: various UI quirks related to faders, sampling, and chopping. - fixed: turned-off LEDs could sometimes glow dimly. - fixed: various stability issues.
Release notesopens in a new tab — teenage.engineering

Tracked in 4 rigs on FW//RADAR.

Teenage Engineering EP-133 K.O. II manual & official pages

Teenage Engineering EP-133 K.O. II firmware FAQ

What is the latest firmware for the Teenage Engineering EP-133 K.O. II?

The latest firmware for the Teenage Engineering EP-133 K.O. II is version 2.5.1, released on 3 Jul 2026. FW//RADAR last checked Teenage Engineering's official page on 11 Sep 2026.

How do I update the Teenage Engineering EP-133 K.O. II?

Update only via browser updater, no directly downloadable file. Full instructions on Teenage Engineering's official firmware page.

What software do I need to update the Teenage Engineering EP-133 K.O. II?

You need Browser updater (Chrome/Brave), available from teenage.engineering.

Where can I download Teenage Engineering EP-133 K.O. II firmware and drivers?

Directly from Teenage Engineering's official firmware page — FW//RADAR links to the source and never hosts firmware files. Official firmware page →

Where can I find the Teenage Engineering EP-133 K.O. II manual?

The official Teenage Engineering user manual is a PDF hosted on teenage.engineering. Teenage Engineering EP-133 K.O. II user manual (PDF) →

Related Teenage Engineering devices

Similar sampler gear

View on Reverb →