DeestechAudio
AMPWELD · Mac + Web · 100% FREE

Three amps. One capture. Free.

Drop three Neural Amp Modeler captures (any format: A1, A2 Full or Lite), set the mix, hear it, press Weld. A few minutes later you have a single .nam that sounds like all three at once — ready for any NAM player, pedal or plugin. That thick "three heads in one room" tone, as one file.

New in 1.1: REFINE. Drop any A2 capture and get back an HD Lite — the Lite model re-trained against the capture's own Full model. Stock Lites miss the Full by 1–5%; a few minutes of refining brings that under 1%. Same file size, same pedal, more of the feel. Mac and web.

Free, no account, no trial, no catch — we email you the download link. macOS 13+ · Apple silicon & Intel · signed & notarized · 5.2 MB · no spam, unsubscribe any time.

How it works (one-pager) Run AMPWELD in your browser →No download, no sign-up: the same engine compiled to WebAssembly. Works on Mac, Windows and Linux in Chrome, Edge, Safari or Firefox; welds use every core of your machine and nothing is uploaded.

iPhone and Android versions are in the works.

The AMPWELD window: three capture slots with mix sliders, the Weld panel with its error chart, and the Result panel with Save .nam and Save for HX Stomp

How it works

four steps
01

Drop three captures

Any A2 captures from TONE3000 — head-only or with cab. AMPWELD reads each one's interface level and levels them like a studio engineer would.

02

Set the mix, hear it

Three level knobs. Hear each amp alone or the blend, on a built-in test guitar. The amps are phase-aligned, so they add up instead of hollowing out.

03

Weld

AMPWELD trains one small NAM model to sound exactly like the three big ones mixed. Three, eight or twenty minutes; the error curve shows it closing in.

04

Play it, save it

Play your guitar live through the result from your interface, compare it with the three amps, then save a .nam — or an HX Stomp file for the NAM A2 Lite firmware.

Under the hood

engine notes
FORMATReads A2 captures (TONE3000 downloads). Writes a standard A2 Lite .nam: loads in the NAM plug-in, TONE3000, Dimehead, and any pedal that takes Lite models.
ACCURACYThe engine matches the official Neural Amp Modeler to 0.0000002. Typical welds land under 1% error; 2–3% still sounds right.
SPEEDPure native code on every core. A standard weld on an Apple-silicon Mac finishes in minutes, not hours.
PRIVATENo account, no upload, no analytics. Your captures and your blends never leave your computer.
LICENCEYou blend captures you downloaded yourself; AMPWELD ships none. Respect each maker's terms — TONE3000's T3K licence allows using and publishing what you make.
FINISHDark anodised aluminium out of the box; natural brushed aluminium in Settings. The whole unit is a rendered faceplate with live controls: knobs, moving-coil meter, glass displays.
HX STOMP"Save for HX Stomp" writes the user-IR file for the community NAM A2 Lite firmware. Import it as a User IR in HX Edit and point the Model knob at that slot.
IN YOUR BROWSERThe whole welder also runs as a free web app at ampweld.mrdeesmusic.com: same engine, same faceplate, same .nam and HX Stomp exports, no install.
CONVERTERAny NAM file works: A1, A2 Full or A2 Lite. Drop captures on SAVE HX STOMP (or File › Convert) and they come out as Stomp files; a capture with no Lite inside is distilled into one automatically.

Free, from Deestech.

Made by guitarists who wanted that three-amp tone on one pedal. If you make something great with it, tell us.

Get AMPWELD for MacOpen the web appContact supportSee all apps

Neural Amp Modeler is an open-source project by Steven Atkinson. TONE3000 and HX Stomp are trademarks of their owners; AMPWELD is not affiliated with them.