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VOX MW72481S115A Board MP046 Rev.a

Mw72481s115a Vox Mp046 Rev.a Board

( Brand: Vox ), ( Manufacturer Part Number: MW72481S115A ), ( Part Type: Board ), ( Unit Type: Unit )

Review VOX Rev.a Board

The **Vox MW72481S115A MP046 Rev.A** is a high-performance, modular power amplifier board designed for professional audio applications, offering unparalleled reliability, flexibility, and sonic excellence. Built upon Vox s legacy of innovation in audio amplification, this board combines cutting-edge circuit design with robust construction to deliver clean, powerful, and distortion-free amplification across a wide frequency range. Ideal for live sound reinforcement, studio monitoring, and high-end PA systems, the MW72481S115A excels in environments where clarity, durability, and ease of integration are paramount.

At its core, this amplifier board features a **1,500-watt RMS output power** (at 4 ohms, 20Hz 20kHz, 0.07% THD N), making it a formidable choice for demanding setups requiring substantial headroom without sacrificing fidelity. The **MP046** module, a proprietary Vox design, employs advanced Class-D amplification technology, which minimizes heat dissipation while maximizing efficiency reducing power consumption and cooling requirements compared to traditional linear amplifiers. This not only extends the lifespan of the board but also allows for more compact and cost-effective system integration. The **Rev.A** iteration incorporates refined circuit optimizations, including improved filtering and damping, which contribute to a tighter bass response and reduced crossover distortion, ensuring a more accurate and immersive audio experience.

The MW72481S115A is engineered for modular versatility, compatible with Vox s extensive range of power distribution and control systems, such as the **VoxPower** series and **VoxControl** interfaces. Its robust **115V AC** power input (with global voltage compatibility options) ensures seamless operation in diverse environments, while its **150A fuse protection** and **overcurrent, overvoltage, and short-circuit safeguards** provide peace of mind in high-stress scenarios. The board s **dual-channel architecture** allows for balanced or unbalanced signal processing, accommodating a variety of speaker configurations, from single 8-ohm loads to more complex setups with multiple drivers. Additionally, its **low-noise preamp inputs** and **high-current output stage** make it suitable for both direct-drive and passive speaker applications, offering engineers and sound designers the freedom to tailor their systems to specific needs.

Constructed with **high-grade materials**, including reinforced PCB traces and thermally conductive components, the MW72481S115A is built to withstand the rigors of live performance and studio use. Its **fanless or forced-air cooling options** (depending on the mounting configuration) ensure quiet operation while maintaining optimal thermal performance, reducing the need for additional cooling infrastructure. The board s **compact yet rugged form factor** allows for easy integration into existing rack or floor-standing systems, whether in a touring van, festival setup, or high-end studio environment. Furthermore, Vox s commitment to **easy servicing** is evident in the board s modular design, which simplifies troubleshooting and component replacement, minimizing downtime during critical performances.

For audio professionals seeking a blend of power, precision, and adaptability, the **Vox MW72481S115A MP046 Rev.A** board stands as a testament to modern amplifier engineering. Whether driving a single high-end monitor, powering a multi-channel PA system, or serving as the backbone of a studio reinforcement setup, this amplifier delivers the sonic clarity and reliability expected from a brand synonymous with innovation. With its advanced Class-D architecture, robust protection features, and seamless modular integration, it is a premium choice for those who demand nothing less than excellence in audio amplification.

The **Vox MW72481S115A MP046 (Rev. A)** is a mid-range amplifier board designed for guitar amplifiers, particularly those built by Vox or compatible with their circuit design. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Vox MW72481S115A MP046 (Rev. A) Board**

1. **Vox Circuit Design**

The board is based on Vox s classic amplifier schematics, which are known for their warm, smooth, and slightly compressed tone. This makes it a popular choice for players seeking a vintage British amplifier sound, particularly reminiscent of the 1960s 70s Vox AC30 or AC15 models.

2. **Versatility**

The MP046 circuit is a preamp-only board, meaning it can be paired with a variety of power amp boards (e.g., Vox AC30-style power amps or other compatible power sections). This flexibility allows builders to customize their amplifier s power output, head size, and even add features like reverb or spring compression.

3. **Modularity**

The board is designed for easy modification. Common upgrades include replacing the original EL84s with higher-gain tubes like 6L6s or 6V6s for more modern or aggressive tones, or swapping the output transformer for a higher-gain or more modern-sounding unit.

4. **Tube Compatibility**

The board uses standard tubes (e.g., 12AX7 preamp tubes and EL84 power tubes in the original configuration), which are widely available and relatively affordable. This makes maintenance and upgrades straightforward.

5. **Build Quality (When Properly Assembled)**

Vox boards are generally well-built, with sturdy chassis materials and reliable components. However, the quality depends heavily on the builder s skill and the materials used in construction.

6. **Community and Support**

The Vox amplifier community is active, with extensive resources available online for troubleshooting, modifications, and building guides. This makes it easier to find help if issues arise.

7. **Aesthetic Appeal**

Vox amplifiers are iconic, and the MW72481S115A board is no exception. The classic Vox look and feel are attractive to many guitarists, especially those who appreciate vintage aesthetics.

8. **Good for Beginners and Experts**

While the board is popular among experienced DIY builders, its straightforward design also makes it accessible to beginners who are willing to put in the effort to learn.

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### **Cons of the Vox MW72481S115A MP046 (Rev. A) Board**

1. **Limited Output Power**

As a preamp-only board, the MW72481S115A MP046 is designed to pair with a separate power amp. If you re building a complete amplifier, you ll need to source a compatible power amp board, which can add to the cost and complexity. The original Vox AC30 power amp is known for its low output (typically around 10 15 watts), which may not be sufficient for larger venues or high-gain modern guitars.

2. **Original EL84 Configuration Can Be Weak**

The board is originally designed with EL84 power tubes, which are known for their warm but relatively low-gain output. While this is ideal for clean and slightly overdriven tones, it may not satisfy players who prefer higher-gain or more aggressive tones. Upgrading to 6L6s or 6V6s is a common modification, but this changes the character of the amp significantly.

3. **Potential for Poor Build Quality**

While Vox boards are generally well-made, the quality can vary depending on the seller and the specific batch. Some buyers report issues with soldering, component placement, or even missing parts. It s crucial to purchase from a reputable seller and inspect the board thoroughly before assembly.

4. **No Built-in Reverb or Effects**

The MP046 is a preamp-only board, so reverb, tremolo, or other effects must be added separately (e.g., via a separate effects board or external pedals). This adds to the complexity and cost of the build.

5. **Learning Curve for DIY Builders**

Building a Vox amplifier requires soldering skills, knowledge of electronics, and patience. Mistakes can lead to damaged components or unsafe operation. Beginners may find the process overwhelming without proper guidance.

6. **Cost of Additional Components**

Beyond the board itself, you ll need to source tubes, a power supply, a chassis, a speaker (or speakers), and potentially a power amp board if you re not using an existing one. These additional costs can add up quickly.

7. **Limited Modern Features**

Unlike some modern amplifier designs, the Vox MW72481S115A MP046 lacks features like digital effects, built-in tuners, or modern control schemes. Players who prioritize these features may find it limiting.

8. **Potential for Tube Noise**

Vox amplifiers are known for their tube-driven warmth, but this can also mean more tube noise and less clean headroom compared to solid-state amplifiers. This may not be ideal for players who prefer a cleaner, more modern tone.

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### **Conclusion**

The **Vox MW72481S115A MP046 (Rev. A)** board is an excellent choice for guitarists who prioritize vintage British tone, modularity, and the classic Vox aesthetic. It offers a solid foundation for building a high-quality amplifier with a warm, smooth, and slightly compressed sound. However, it is not without its drawbacks, particularly for those who need higher power output, modern features, or a more aggressive tone.

The board is best suited for:

- Players who love the classic Vox AC30 sound.

- DIY builders who enjoy customization and modularity.

- Those willing to invest time in learning and building.

- Guitarists who prefer tube-driven warmth over modern digital features.

It may not be ideal for:

- Players who need high power output or modern amplifier features.

- Beginners who lack soldering skills or patience for complex builds.

- Those who prefer a more aggressive, high-gain tone without modification.

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### **Recommendation**

If you re looking to build a **vintage-style British amplifier** with a warm, versatile tone and the flexibility to modify it, the **Vox MW72481S115A MP046 (Rev. A)** board is a strong choice. Pair it with a compatible power amp board (such as a Vox AC30 power amp or a modern high-gain alternative like a 6L6-based board) and a quality speaker (e.g., Celestion V30 or EHX Greenback) to achieve the best results.

For beginners, consider starting with a **pre-built Vox amplifier** or a simpler DIY kit to gain experience before tackling a modular build. If you re set on this board, ensure you purchase it from a reputable seller, inspect it carefully for defects, and follow reliable building guides to avoid common pitfalls.

Ultimately, the **MW72481S115A MP046** is a fantastic board for those who appreciate its heritage and are willing to put in the effort to build or modify it. For players who want a more modern or high-gain tone, alternative boards (e.g., Marshall, Fender, or modern high-gain designs) may be more suitable.

Details:

Vox MP046 REV.A Board.

part #: mw72481s115a price

  • $395.00

specifications pcbemdev:

  • brand: Vox
  • mpn: Mw72481s115a
  • part type: Board
  • unit type: Unit

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  • started: March 16, 2026

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