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Every hard fact about CHUCK — connections, power amp, audio interface, build.
The key numbers. More detail in the tables below.
2x E83CC
High-voltage tubes · approx. 250 V
10
Voicings
5
Outputs
25 W
Power amp @ 4 Ω
2 In/2 Out
USB Audio Interface, 48 kHz
MIDI
PC + CC, Full Control
3,2 kg
Made in Germany
CHUCK ships with a 24 V external power supply — but tubes need proper voltage to work as intended. That’s why CHUCK internally steps the incoming 24 V up to approximately 250 V tube operating voltage. The tube stage then behaves like a real analog circuit: proper headroom, response, saturation and dynamic interaction. No starvation gimmick, no “tube flavor” decoration — real tube operation.
CHUCK uses an external supply for three clear reasons: to keep the unit as compact as possible, to reduce internal noise and interference, and to keep the design reliable and stage-ready. The supply is lockable, so it stays securely connected during live use, transport and demanding stage situations.
CHUCK’s analog tube input stage is where the core feel begins. Before effects, before presets, before any digital processing, your instrument meets a real analog circuit — where dynamics, attack, body and harmonic structure are shaped. If the raw tone already feels inspiring, everything that follows becomes more musical.
Designed for direct playing feel — fast, direct and connected. Only the IR sits outside the base figure.
Base latency
Already includes the analog section, EQ, reverb, delay, chorus, amp simulation, main EQ, compressor and FX Loop — everything except the IR.
IR Loader (factory IRs)
Wah
FX Loop — plus the latency of your external device
ATE is not a modeling system. It doesn’t recreate a fixed profile — it shapes real analog voicings from the circuit itself.
Learn moreRecreates a fixed amplifier profile.
A digital snapshot of a sound.
Works with real analog tube behavior and creates different analog voicings at the circuit level.
The modern evolution of amp modding — no soldering, no open chassis. Controllable, recallable and playable.
Not a fragile studio experiment — a professional instrument platform. Great tone starts at the input.
Floor format, tour-ready.
Stays connected on stage and in transport.
Clean signal, quiet floor.
Reliable under demanding conditions.
Immediate feel under the fingers.
Five outputs, IR, MIDI, FX Loop.
| Guitar Input | |
| Type | 6.35mm jack, unbalanced |
| Impedance | 1 MOhm |
| Input level max. | 12 dBu |
| FX Loop - Send | |
| Type | 6.35mm jack, unbalanced / balanced |
| Impedance | 75 Ohm unbalanced / 150 Ohm balanced |
| Output level max. | 6 dBu unbalanced / 6 dBu balanced |
| FX Loop - Return | |
| Type | 6.35mm jack, unbalanced / balanced |
| Impedance | 8 kOhm unbalanced / 10 kOhm balanced |
| Input level max. | 6 dBu unbalanced / 6 dBu balanced |
| Out 1 & 2 (Mono) | |
| Type | 6.35mm jack unbalanced / balanced, XLR panel connector balanced |
| Impedance | 75 Ohm unbalanced / 150 Ohm balanced |
| Output level max. | 12 dBu unbalanced / 12 dBu balanced |
| Signal | Mono – both outputs carry the same signal (e.g. Out 1 for PA, Out 2 for in-ears) |
| Speaker | |
| Type | 6.35mm jack, unbalanced |
| Power @ 4 Ohm | 25W |
| Headphones | |
| Type | 3.5mm jack, stereo |
| Power @ 32 Ohm | 40mW / channel |
| Aux In | |
| Impedance | 10 kOhm |
| Input level max. | 9 dBu |
| USB | |
| Type | USB 2.0, Type B |
| Audio | 2 In/2 Out, 48 kHz, ASIO supported |
| Midi | |
| Type | DIN 5 socket, 180° |
| DSP | |
| Latency (base) | 0.86 ms (incl. amp sim, EQ, effects, compressor, FX Loop; excl. IR) |
| Latency IR Loader | +0.21 ms (factory IRs) |
| Latency Wah | +0.08 ms |
| Latency FX Loop | external device + 0.005 ms |
| Resolution | 24bit |
| Signal processing | Mono (entire signal path incl. effects) |
| Memory | |
| Presets | 7 |
| IR | 12 factory IRs, 20 user IRs |
| IR Loader | |
| File format | .wav |
| Sample rate | 48 kHz internal, 44.1 kHz to 192 kHz supported |
| Resolution | 24 bit |
| Points | 512 / 1024 / 2048* |
| Power | |
| Input | 24V/2A |
| Output | 9V/0.8A |
| Miscellaneous | |
| Dimensions | W/H/D 500 x 65 x 156 mm |
| Weight | 3.2kg |
| Accessories | USB cable Type A to Type B, external lockable power supply, Quick-Start |
| Tube Operation | |
| Preamp Anode Voltage | approx. 250 V (internally generated from 24 V power supply) |
CHUCK amp · floor format, 3.2 kg, Made in Germany
External power supply · lockable, kept off-board to avoid interference
USB-C cable · for STUDIO software and recording
Quick Start Guide · stick it on, plug in, go
Access to STUDIO software · download for macOS and Windows
2-year manufacturer's warranty · on parts and workmanship
STUDIO software (macOS/Windows), firmware updates, manual, Quick Start Guide — all in one central download hub.
Plus the Preset Library: curated sound packs, expanded regularly.
Reading specs is one thing. Playing is another. 30 days to make up your mind.
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