VOX MV50-AC – Compact 50-Watt Hybrid Guitar Amplifier Head with Nutube Preamp and Class D Power Stage
Introduction
The VOX MV50-AC is a highly revolutionary, ultra-compact hybrid guitar amplifier head designed to deliver the legendary, touch-sensitive chime and organic crunch of a traditional VOX AC30 tube amplifier. Weighing just 540 grams and fitting easily in the palm of your hand, this micro-head merges Korg's next-generation vacuum tube technology with a highly efficient power stage, fitting beautifully into minimalist desktop recording workspaces and portable live performance rigs.
Main Features
The defining strength of the VOX MV50-AC lies in its all-analog preamp circuitry and groundbreaking vacuum tube technology. The preamp is powered by a Korg Nutube 6P1, a next-generation true vacuum tube that delivers the rich harmonic warmth, touch-sensitive sag, and natural clipping of traditional vacuum tubes in a highly stable, low-noise, and energy-efficient package. Voiced specifically to capture the signature chime, sparkling cleans, and dynamic overdrive that have defined classic British guitar tone for generations, the all-analog preamp circuit preserves your guitar's natural tone and volume dynamics.
This analog front-end is paired with a highly reliable, quiet, and efficient Class D power amplifier specifically engineered to respond to the fine nuances of your playing technique. Despite its micro-size, the MV50-AC can easily drive any type of external speaker cabinet, outputting a full 50 watts at 4 ohms.
For silent practice and direct recording, it features a 1/4-inch combined Line/Headphone output jack. This jack is driven by a custom-designed cabinet simulation circuit—engineered in consultation with recording veterans using premium microphones and vintage preamps—to reproduce the authentic sound of a miked guitar cabinet moving physical air.
Additionally, the rear panel features a multi-level Attenuator switch to tame your output volume and a two-way EQ switch. Setting the EQ to "DEEP" emphasizes low-end punch when connected to micro-cabinets (like the VOX BC108), while setting it to "FLAT" allows larger cabinets to project their natural frequency characteristics with zero coloring.
Usage Scenarios
- Studio: Reclaim valuable desk space by running the cabinet-simulated line output directly to your recording interface for pristine, high-definition tracking.
- Live performance: Travel light to gigs with a micro-amp that weighs just over a pound but easily drives a full-sized 4×12 cabinet on stage.
- Practice: Run silent late-night practice sessions using the simulated headphone jack and standard power adapter.
- Recording: Capture saturated, touch-sensitive power-amp tube characteristics directly on your computer without using loud microphones.
- Education: Instruct students on gain structure and classic British tone-shaping, using a simple, highly visual three-knob interface.
Features
- Ultra-compact hybrid guitar amplifier head delivers massive 50-watt output from a palm-sized chassis.
- Preamp is driven by a Korg Nutube 6P1 true vacuum tube for organic harmonic warmth and sag.
- High-efficiency Class D power amplifier section responds dynamically to your playing technique.
- Classic AC-voiced preamp circuit is meticulously tuned to emulate the signature chime and crunch of the AC30.
- Combined Line/Headphone output jack features built-in cabinet simulation for direct-to-console recording.
- Rear-panel EQ switch offers Flat and Deep modes to optimize the tone for small or large speaker cabinets.
- Rear-panel Attenuator switch adjusts output power to match 4-ohm, 8-ohm, and 16-ohm speaker impedances.
- Three-knob interface provides fast, intuitive control over Gain, Tone, and Volume parameters.
- Sleek, premium metal enclosure is finished with an iconic polished mirror front plate.
- Onboard analog VU meter displays active output levels for a distinct vintage aesthetic.
Technical Specs
- Amplifier Type: Hybrid (Analog Nutube Preamp with Class D Power Amp)
- Preamp Valve: Korg Nutube 6P1
- Number of Channels: 1
- Controls: Gain, Tone, Volume
- Output Power: Maximum 50W RMS at 4 Ohms, 25W RMS at 8 Ohms, 12.5W RMS at 16 Ohms
- Inputs: 1 x 1/4-inch Standard Monaural Instrument Jack
- Outputs: 1 x 1/4-inch Speaker Output Jack, 1 x 1/4-inch Combined Headphone/Line Output Jack
- Rear Switches: Flat/Deep EQ Switch, Attenuator/Impedance Switch (4/8/16 Ohms), Eco Auto Power-Off Switch
- Power Supply: 19V DC AC Power Adapter (included)
- Current Consumption: 3.43A
- Dimensions: 135 mm (W) x 100 mm (D) x 75 mm (H)
- Weight: 540 grams / 1.19 lbs
CK Music Staff Recommendation
The CK Music team recommends the VOX MV50-AC (AC30 voiced) for home studio recording guitarists, active gigging musicians, and traveling players who need a classic British tube tone but refuse to carry heavy gear. Standard micro-amplifiers rely entirely on solid-state digital processors, which often results in a cold, synthetic sound that lacks the natural touch sensitivity, compression, and dynamic feedback of a physical tube amp. The VOX MV50-AC completely solves this problem. By matching an all-analog, Korg Nutube preamp with a robust Class D power stage, it successfully delivers the genuine grit, midrange chime, and sag of a classic British AC30 tube stack. When combined with its medical-grade cabinet simulation and palm-sized metal chassis, it operates as an incredibly smart, direct-recording, and live-gigging powerhouse.