About This Item
Description
The Hotone Ampero II Stomp MP-300 packs the same 460-effect Ampero II engine into the smallest, lightest board-mount chassis in the line, and firmware V2.5.0 brings native NAM A2 loading right onto the unit.
Which Ampero II processor should you choose?
| Model | Screen | Built-in EXP pedal | Mic input | Balanced outs | MIDI | Weight | NAM A2 (device) |
|---|---|---|---|---|---|---|---|
| Ampero II Stage (MP-380) | 5" 800x480 touch | No | XLR/TS combo, 52dB, 48V phantom | 2 x XLR | 3.5mm TRS in/out + Bluetooth MIDI | 1895 g | Yes, firmware V1.7.0 (2026-07-22) |
| Ampero II Stomp (MP-300) | 4" 800x480 touch | No | No XLR – 2x TS inputs | 2 x TRS balanced | 5-pin MIDI in/out | 1050 g | Yes, firmware V2.5.0 (2026-07-30) |
| Ampero II (MP-350) | 5" 800x480 touch | Yes, two-status switching | XLR/TS combo, 52dB, 48V phantom | 2 x XLR | 5-pin MIDI in/out | 1695 g | Yes, firmware V1.4.0 (2026-07-30) |
All three run the same 460+ effect library, 12 simultaneous effect slots, and 300 patches, and as of their current firmware, all three natively load NAM A2 files in Lite format via an onboard NAM module – Hotone's own release notes require Ampero II software V1.4.0 or later for the update. Pick Ampero II Stomp for the smallest, lightest, lowest-power board-mount unit with 5-pin MIDI and TRS balanced outs. Pick Ampero II Stage when you need XLR outs, a mic input with phantom power, two EXP/CTRL jacks, and Bluetooth, and can accommodate 1895 g and 3.5 mm TRS MIDI jacks. Pick Ampero II when you want the same XLR I/O and mic input plus an onboard expression pedal and standard 5-pin MIDI, at 1695 g.
Why guitarists choose the Ampero II Stomp
- Native NAM A2 support on the device itself: firmware V2.5.0 (released 2026-07-30) added the same NAM effect module found on Ampero II Stage, natively loading NAM A2 files in Lite format, requiring Ampero II software V1.4.0 or later.
- 460 effects (incl. global EQ) across 16 modules with 12 simultaneous slots and 300 patches – the same processing depth as Stage and Ampero II, in a smaller enclosure.
- Smallest and lightest of the three second-generation processors at 1050 g and 18.5 x 14.5 x 5.8 cm, so it drops onto a compact board where Stage or Ampero II would not fit.
- EXP/CTRL jack is officially documented as "Perfect for Ampero Press or Ampero Switch", and MIDI IN is "Perfect for Ampero Control" – both directly stated in Hotone's own manual.
- Standard 5-pin MIDI in/out and 2 x 1/4" TRS balanced outputs, instead of Stage's XLR and 3.5mm TRS MIDI, for players who prefer conventional studio and stage connectors.
- Lower current draw than Stage or Ampero II at 800 mA max (9V), easier on a compact pedalboard power supply.
Controls and switches
- 4" touchscreen – full patch/effect editing on the unit.
- Footswitches – patch change, effect on/off, tap tempo.
- Individual input-mode selectors per input.
- Power switch.
Power and pedalboard compatibility
Runs on 9-18V DC centre negative, drawing up to 800 mA at 9V; Hotone recommends always using the included genuine power adapter. Input impedance is E.GT 1 MΩ / A.GT 4.7 MΩ / LINE 10 kΩ, FX loop return 100 kΩ, Aux In 10 kΩ. Output is 1 kΩ (unbalanced, balanced, FX send), headphones 47 Ω.
Technical specifications
| Model | Ampero II Stomp (MP-300) |
| Product class | CDCM HD Gen 2 Amp Modeler / Effects Processor |
| Screen | 4" 800x480 touchscreen |
| Effects / modules / slots / patches | 460 (incl. global EQ) / 16 / 12 / 300 |
| Outputs | 2 x 1/4" TRS balanced (no XLR) |
| MIDI | 5-pin MIDI in + out |
| USB | USB-C, USB Audio 2.0 |
| Power | 9-18V DC centre negative, 800mA max at 9V |
| Dimensions | 18.5 x 14.5 x 5.8 cm |
| Weight | 1050 g |
| NAM A2 (device) | Supported from firmware V2.5.0 (2026-07-30); requires Ampero II software V1.4.0+ |
FAQ
Does Ampero II Stomp load NAM A2 files on the device? Yes. Firmware V2.5.0, released 2026-07-30, added the same NAM effect module used on Ampero II Stage, natively loading NAM A2 files in Lite format directly on the unit.
What software do I need to update to get NAM A2? Ampero II software V1.4.0 or later, with Ampero II Setup V1.5.1 as the current matching editor build.
How is Ampero II Stomp different from Ampero II Stage? Stomp is smaller and lighter (1050 g vs 1895 g) with a 4" screen instead of 5", 5-pin MIDI instead of 3.5mm TRS MIDI, TRS balanced outputs instead of XLR, and no built-in mic preamp or Bluetooth.
Which pedals and controllers does Ampero II Stomp officially support? Its EXP/CTRL jack is documented as "Perfect for Ampero Press or Ampero Switch", and its MIDI IN is "Perfect for Ampero Control". The Ampero Switch+ Operating Guide also covers this unit directly.
How many effect slots can I use at once? 12 simultaneous effect slots, drawn from a library of 460 effects across 16 modules.
What power supply does it need? 9-18V DC centre negative, drawing up to 800 mA at 9V – Hotone recommends the included genuine power adapter.
Works well with
Ampero Press (SP-30), Ampero Switch, Ampero Switch+ (FS-2), Ampero Control (EC-4), Karat Cap
