Klavis Twin Waves MKII Black firmware 1.35

Latest firmware: 1.35

1.35

What's new in 1.35

v1.35 adds Octave Selector feature (also compatible with original Twin Waves). v1.35 and v1.36 are functionally identical; v1.36 is for manufacturing purposes only.

Last checked 11 Sep 2026

Download 1.35 from Klavisopens in a new tab — klavis.com

How to update the Klavis Twin Waves MKII Black

Download the firmware zip from the Twin Waves MKII product page. During power-up, hold the Osc2 and Sync buttons, then play the firmware WAV file from an audio output connected to the FM/AM input.

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

Get Klavis Twin Waves MKII Black firmware alerts

We check Klavis's official download page every day. Sign in and we'll tell you — by email, Telegram or push — the moment a new Klavis Twin Waves MKII Black 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

Klavis Twin Waves MKII Black firmware update history

Changelogs summarised from the manufacturer's release notes.

1.35

Release notes for this version are listed above.

Release notesopens in a new tab — klavis.com

Klavis Twin Waves MKII Black manual & official pages

Klavis Twin Waves MKII Black user manual (PDF)opens in a new tab — klavis.com
Klavis Twin Waves MKII Black on klavis.comopens in a new tab — klavis.com
Download Klavis Twin Waves MKII Black firmware from Klavisopens in a new tab — klavis.com

Klavis Twin Waves MKII Black firmware FAQ

What is the latest firmware for the Klavis Twin Waves MKII Black?

The latest firmware for the Klavis Twin Waves MKII Black is version 1.35. FW//RADAR last checked Klavis's official page on 11 Sep 2026.

How do I update the Klavis Twin Waves MKII Black?

Download the firmware zip from the Twin Waves MKII product page. During power-up, hold the Osc2 and Sync buttons, then play the firmware WAV file from an audio output connected to the FM/AM input. Full instructions on Klavis's official firmware page.

Where can I download Klavis Twin Waves MKII Black firmware and drivers?

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

Where can I find the Klavis Twin Waves MKII Black manual?

The official Klavis user manual is a PDF hosted on klavis.com. Klavis Twin Waves MKII Black user manual (PDF) →