ESU LOKSOUND Adapter Board 4044645519677 21MTC

( Brand: Esu Loksound ), ( Manufacturer Part Number: 51967 ), ( Non-domestic Product: No ), ( Assembly Status: Unassembled Kit ), ( Color: Blue ), ( Quantity: Single Piece ), ( Year Manufactured: 2026 ), ( Type: Dcc Systems Accessories ), ( Recommended Age Range: 14 And Up ), ( Item Width: Length 22.0mm X 17.0mm ), ( Country Of Origin: Czech Republic ), ( UPC: 044645519677 )

Review ESU LOKSOUND Adapter Board Offer

The **ESU Loksound 51967 21MTC Adapter Board** is a meticulously engineered accessory designed to seamlessly integrate modern 21MTC (21-pin Motorola) sound decoders with traditional DCC (Digital Command Control) layouts, bridging the gap between contemporary digital sound technology and classic model railroading setups. This high-quality adapter board serves as a critical intermediary, allowing enthusiasts to harness the advanced audio capabilities of 21MTC decoders such as realistic locomotive sounds, detailed announcements, and dynamic effects while maintaining compatibility with existing DCC infrastructure. Crafted with precision, the board features a robust PCB (Printed Circuit Board) layout that ensures stable signal transmission and minimizes interference, making it ideal for both hobbyists and serious modelers seeking to elevate their layouts with lifelike audio fidelity. The adapter board is particularly well-suited for layouts that utilize older DCC systems or those that lack native 21MTC support, offering a straightforward solution to expand functionality without requiring costly upgrades. Its compact yet durable design allows for easy installation within tight spaces, whether mounted directly on a sound decoder or integrated into a larger control panel. With its reliable performance and compatibility with a wide range of ESU sound decoders, this adapter board empowers modelers to create immersive, audio-rich scenes that bring their railroads to life with unprecedented realism. Whether used for a single locomotive or integrated into a larger sound system, the 51967 21MTC Adapter Board is an indispensable tool for those who demand the best in digital sound technology for their model railroading experience.

The **ESU Loksound 51967 21MTC Adapter Board** is a popular accessory for digital model railroading enthusiasts who use the **21MTC (21-pin Motorola) protocol** but want to integrate it with **NCE (NEM602) or other digital systems** via the **Loksound decoder**. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the ESU Loksound 51967 21MTC Adapter Board**

1. **Compatibility with 21MTC Decoders**

- The adapter allows **21MTC-compatible decoders** (such as those from ESU, Lenz, or other manufacturers) to be controlled via **NCE (NEM602) or other digital systems** that use the **Loksound protocol**. This is particularly useful for users who already have a **Loksound-compatible central unit** (e.g., Loksound 5000, 5000 , or 5100) but need to expand their setup with 21MTC decoders.

2. **Expands System Flexibility**

- If you have a **mixed fleet of decoders** (some NEM602/NCE, others 21MTC), this adapter lets you **integrate them under a single control system**. This avoids the need for multiple central units or complex wiring solutions.

3. **Preserves Existing Loksound Infrastructure**

- Since the adapter works with **Loksound s existing wiring and power distribution**, you don t need to rewire your entire layout. This is cost-effective if you already have a Loksound system in place.

4. **Supports Advanced Features**

- The adapter allows **access to additional functions** (such as **sound, lighting, and advanced motor control**) that may not be available on basic NCE-compatible decoders. This is beneficial for **sound-equipped locomotives** that rely on the 21MTC protocol.

5. **Easy Installation**

- The adapter is **relatively straightforward to install**, requiring only basic soldering skills. It connects between the **21MTC decoder and the Loksound central unit**, with minimal additional wiring.

6. **Backward Compatibility**

- If you later decide to **upgrade to a newer Loksound central unit** (e.g., Loksound 5100), the adapter may still work, reducing the need for a full system overhaul.

7. **Cost-Effective for Existing Users**

- For those already invested in **Loksound hardware**, this adapter provides a **low-cost way to add 21MTC decoders** without purchasing a separate NCE-compatible decoder or central unit.

---

### **Cons of the ESU Loksound 51967 21MTC Adapter Board**

1. **Limited to Loksound Systems**

- The adapter **only works with Loksound central units** (e.g., 5000, 5000 , 5100). If you use **other digital systems** (such as **DCC or JMRI with a different interface**), this adapter will not be compatible.

2. **No Direct NCE/NEM602 Control Without Loksound**

- While the adapter allows **21MTC decoders to be controlled via Loksound**, it does **not** make them directly controllable by **NCE software** (e.g., JMRI, DCC-Expert) without the Loksound central unit acting as an intermediary. If you want **full NCE compatibility without Loksound**, you would need **NCE-compatible 21MTC decoders** (which are rare).

3. **Potential Signal Interference**

- Since the adapter **translates between 21MTC and Loksound protocols**, there is a **small risk of signal degradation** if wiring is not done correctly. Poor connections or long cable runs could lead to **unreliable decoder operation**.

4. **Limited Availability of 21MTC Decoders**

- **21MTC decoders are becoming less common** as the industry shifts toward **NEM602/NCE**. Many modern decoders (especially sound-equipped ones) now use **NEM602 or USB-based protocols**, making this adapter less useful for new purchases.

5. **No Future-Proofing**

- If you plan to **expand your system significantly**, investing in **NCE-compatible decoders and a modern central unit** (e.g., **NCE PowerCab, DCC-Expert, or JMRI**) may be more future-proof than relying on a Loksound-specific adapter.

6. **Soldering Required for Installation**

- While not difficult, **soldering is still necessary** to connect the adapter to the decoder and Loksound system. Those uncomfortable with soldering may find this a drawback.

7. **No Direct USB or Computer Control**

- Unlike some modern systems, this adapter **does not provide a USB interface** for direct computer control. You must still rely on the **Loksound central unit** for operation.

---

### **Conclusion**

- Already have a **Loksound central unit** and want to integrate **21MTC decoders** into their system.

- Have a **mixed fleet of decoders** (some NEM602, some 21MTC) and prefer keeping their existing Loksound infrastructure.

- Need **sound and advanced features** from 21MTC decoders without switching to a different system.

- Users who **do not have a Loksound central unit** and want a standalone NCE-compatible solution.

- Those planning to **expand their system significantly** in the future, as 21MTC decoders are declining in popularity.

- Enthusiasts who prefer **direct computer control** (USB-based systems) or **modern NEM602/NCE compatibility**.

---

### **Recommendation**

- You are **already using Loksound** and need to add **21MTC decoders** (e.g., older ESU or Lenz sound decoders).

- You have a **limited number of 21MTC decoders** that you want to integrate without changing your entire system.

- You find the adapter **affordable** compared to purchasing new NCE-compatible decoders.

- You are **starting a new layout** and want a **modern, future-proof system** (consider **NCE PowerCab, DCC-Expert, or JMRI** instead).

- You **do not have a Loksound central unit** and cannot justify the investment in one.

- You prioritize **direct computer control** and **USB-based operation** over Loksound compatibility.

- If you have **21MTC decoders but no Loksound system**, look for **NCE-compatible 21MTC decoders** (though these are rare).

- If you want **full NCE compatibility**, consider **upgrading to NEM602/NCE decoders** (e.g., **ESU LokPilot, Digitrax, or NCE s own decoders**) and using a **modern central unit** (e.g., **NCE PowerCab, SoundTraxx, or DCC-Expert**).

- If you are **only using a few 21MTC decoders**, the adapter may be worth it for **short-term convenience**, but long-term, a **full NCE transition** is likely better.

The adapter is a **practical stopgap for Loksound users** but not a long-term solution for those building or upgrading a modern digital layout. If you are committed to Loksound, it is a **good investment**; otherwise, consider migrating to a **more widely supported digital system**.

Details:

Ship saver is our carrier and they provide excellent service. Its your choice. Model resupply. Loud speaker outputs.

# 51967 21MTC Adapter Board. USA Shipping. EVERY ORDER now gets a $5.00 coupon code toward your future order. Combined Shipping Discounts: USA.

ESU LokSound. Handling and Shipping time. The 21 MTC adapter board is suitable for digitising a loco without interface and the case you do not intend to wire decoder freely. Mountain Subdivision Hobbies.

The adapter board offers a possibility for installing decoder with 21MTC connector. This decoder is simply plugged onto the board.

part #: 51967 prices

• $8.79-$11.99

specifications dccsystemsacc:

• brand: Esu Loksound
• mpn: 51967
• non-domestic product: No
• assembly status: Unassembled Kit
• color: Blue
• quantity: Single Piece
• year manufactured: 2026
• type: Dcc Systems Accessories
• recommended age range: 14 And Up
• item width: Length 22.0mm X 17.0mm
• country of origin: Czech Republic
• upc: 044645519677

seller dccsystemsacc:

• # reviews: 53708
• rating: 100.0%
• city: Ontario, New York

returns dccsystemsacc:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days
• method: Money back

shipping dccsystemsacc:

• cost: $6.19
• transit: 4-9 Days
• service: USPS Ground Advantage, USPS Priority Mail, UPS Ground
• class: Standard, Expedited
• carrier: USPS, UPS
• type: Fixed

offer dccsystemsacc:

• options: Ship-to-home
• started: March 28, 2026
• availability: In Stock
• sold: 0
• quantity: 1

payments dccsystemsacc:

• wallet: Google-pay
• other
• credit card: Visa

general dccsystemsacc:

• condition: New
• model Railroads Trains > Power Control > Digital Control Devices

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