Stratus vs Hotone Ampero II Stomp: Hi-Fi Modeler vs Native-NAM Pedal

Last updated: August 31, 2026. Ampero II Stomp specs below come from Hotone's own product pages and store; all sources are listed at the end.

The Hotone Ampero II Stomp is what happens when a modeling company chases audio quality first: a tri-core DSP, ESS Sabre converters with up to 127 dB of dynamic range, 460 effects, a dual serial/parallel chain of twelve blocks, a 4" touchscreen, a 60-second stereo looper, and an 8-in/8-out USB interface — in a pedalboard-sized aluminum box for $499.99. It doesn't run Neural Amp Modeler natively; like the Valeton units from its sister brand, it converts NAM captures into its own DSP environment, per TONE3000. The Stratus is the opposite bet: native A2-Lite, a mono signal path, a fraction of the model count, and an AI that writes new effects — for $200 less. Here's the honest breakdown.

The short version

• Ampero II Stomp is a hi-fi modeling workstation in a stompbox footprint. Hotone's CDCM HD and F.I.R.E. engines, 87 amps, 68 cabs, 20 Celestion IRs plus 50 custom slots, 12-block dual chains, stereo everything, MIDI, expression, a real looper, and a genuinely excellent audio interface. The build and the converters are a class above the price.
• Stratus is native NAM plus an effects chain, in one pedal slot. A2-Lite captures played as-is from a phone (500,000+ on TONE3000), 19 effects in any order, a 5-minute looper, 128 presets with 14 hands-free, full USB-MIDI — 11.6 ounces, $299.
• Conversion vs native, and one AI. The Ampero II Stomp imports NAM by conversion; Stratus runs the original file. And only Stratus can invent an effect from a sentence.

Side by side

What Hotone built

The Ampero II Stomp is a spec sheet that reads like a rack unit: ESS Sabre converters, a tri-core platform, 460 effects including 60-plus Hotone originals, a dual chain where any module goes anywhere, stereo I/O and a stereo loop, and a USB interface that does 8-in/8-out with wet/dry and re-amp — all under a 4" touchscreen with a UI people genuinely like. Twenty Celestion-licensed IRs come standard with 50 slots for your own. It's a strong, mature product from a company that also makes the Valeton line, and for players who want stereo modeling with an interface baked in, it competes with units well above its price.

What Stratus built

The Stratus was built around NAM Architecture 2 — the open format whose published testing (39 tones measured, a 1,000+ participant blind study, open-source data) showed A2-Lite outperforming Quad Cortex captures at about half the CPU of a $3 chip. A2-Lite captures run natively, unconverted, browsed from a phone app with no computer in the loop. Around that engine: 19 effects free in any order, a 5-minute looper with unlimited overdubs, 128 presets with 14 hands-free, full USB-MIDI — and the AI FX Builder, which writes new effects as FAUST DSP code from a description (compilation checks, automated code review, audio testing; ~95% of builds deliver; 30 free builds monthly; source in Advanced Mode; free VST/AU versions; Tone Shop developers keep 75%). Hotone gives you 460 effects; Stratus gives you 19 and a machine that makes more.

Conversion vs native

Hotone's approach is the one most established modelers have taken: keep the proprietary engine, add a NAM import path that translates captures into something the DSP understands. It works, it's convenient for owners, and TONE3000 notes players like the workflow. What you lose is fidelity to the original file and a computer-free path to new tones. Stratus keeps both — the capture you download is the capture you play — because the pedal was designed around the open format rather than adapted to it.

On stage

The Ampero II Stomp's stage story is three footswitches, a touchscreen, an expression input, MIDI in and out, stereo to the desk, and 300 presets. The Stratus's is 14 presets hands-free from color-coded footswitch pairs, 128 stored, and per-effect bypass plus looper transport over USB-MIDI, in a box that leaves room on the board. The pedal is meant to disappear into a rig.

Cost of ownership

Ampero II Stomp: $499.99, everything included, plus bundled desktop software. Stratus: $299 in, 19 effects free, premium from $14.90 (22-effect bundle $99), half a million captures playable natively, 30 free AI builds monthly. The $200 gap buys stereo, a touchscreen, an 8-channel interface, and 460 effects. Keeping it buys native NAM and a generative AI.

Which should you buy?

Buy the Ampero II Stomp if: you want a hi-fi stereo modeling hub with deep dual-chain routing, a touchscreen, and a real audio interface in a pedalboard box — and you're fine converting captures on a computer. It's one of the best-built units at its price.

Buy the Stratus if: you want native NAM from your phone, a chain you design, a looper, MIDI, and the only AI in hardware that invents effects on request — for $299. That's the pedal we built.

Sources

• Hotone — Ampero II Stomp product page (DSP, converters, effects, IRs, chain, I/O)
• Hotone — Ampero II Stomp store listing (price, features)
• Sweetwater — Ampero II Stomp listing (interface, looper, effect count)
• TONE3000 — Best NAM-compatible pedals (Ampero II NAM conversion)
• TONE3000 — NAM Architecture 2 (A2) (test methodology and results; code and data are open source)
• Chaos Audio — Stratus product page (Stratus specs and pricing)

Want native NAM in one pedal slot? The Stratus is $299 with free US shipping — and your first 30 AI builds are on us every month.