MTH 30-20537-1 Rail King Emd Diesel Engine Protosound Ib FP45 3.0-TESTED-EXC

( Brand: Mth ), ( Manufacturer Part Number: 30-20537-1 ), ( Type: Diesel Locomotive ), ( Rail System: Three-rail System ), ( Corporate Roadname: Electromotive Gm )

Review MTH Rail King 20537-1 Emd Diesel Engine Protosound Cond Ib

The **MTH 30-20537-1 Rail King EMD FP45 Diesel Engine** is a meticulously crafted, high-fidelity scale model that captures the raw power and industrial elegance of one of General Motors most iconic diesel locomotives. Engineered under the prestigious **Protosound 3.0** sound system, this model delivers an immersive auditory experience that brings the FP45 s diesel roar, exhaust pulses, and intricate operational sounds to life with unparalleled realism. The **Tested & Ex-CIB (Excellent Condition, In Box)** designation ensures that this locomotive is in pristine, factory-fresh condition, having never been opened or assembled, preserving its original packaging and protective elements for collectors and enthusiasts who demand perfection.

Visually, the FP45 is a masterpiece of mid-century industrial design, featuring bold, angular lines that define its robust yet aerodynamic silhouette. The **highly detailed cab interior** invites operators to step inside, complete with authentic-looking controls, gauges, and seating, while the **photorealistic paint scheme** often rendered in classic railroad colors like Union Pacific s deep reds and golds or Norfolk Southern s earthy browns is executed with painstaking precision, ensuring every panel, rivet, and detail aligns with full-scale prototypes. The **low-profile, articulated design** is faithfully replicated, with smooth articulation points that allow for fluid movement across your layout, mimicking the FP45 s signature dynamic gait. The **DCC-ready motor** provides smooth, consistent power, while the **sound-encoded DCC decoder** (compatible with MTH s proprietary system) ensures that every throttle adjustment triggers the correct engine responses, from idle hums to full-throttle growls, complete with **realistic exhaust cycles** that sync with the locomotive s motion.

Beyond its auditory and visual fidelity, this model is built to last, constructed from durable materials including **high-quality plastic with fine surface details** and **metal components** where necessary, such as the **functional cowl doors** and **operational handrails**. The **low-profile underframe** is designed to accommodate tight track clearances, making it ideal for both mainline and branch-line layouts, while the **easy-access battery compartment** ensures hassle-free maintenance. Whether displayed as a static centerpiece or operated dynamically across your railroad, the **MTH 30-20537-1 Rail King FP45** stands as a testament to MTH s commitment to blending cutting-edge technology with timeless craftsmanship, delivering a model that is as functional as it is visually stunning. Perfect for serious collectors, model railroaders, and enthusiasts who appreciate the marriage of artistry and engineering, this FP45 is not just a locomotive it s a piece of railroad history brought to life with unmatched authenticity.

### **Pros and Cons of buying a MTH 30-20537-1 Rail King FP45 Diesel Engine (Protosound 3.0, Tested-Exc IB)**

1. **High-Quality Sound System (Protosound 3.0)**

- The Protosound 3.0 system delivers realistic diesel engine sounds, including exhaust, intake, and electrical noise, which significantly enhances the model s realism compared to older sound systems.

- The sound is well-balanced, with clear articulation and minimal distortion, making it suitable for both quiet and louder model railroading environments.

2. **Tested and Exc IB (Excellent Internal Body Condition)**

- The "Tested-Exc IB" designation means the locomotive has been professionally inspected for structural integrity, electrical functionality, and mechanical operation.

- The internal body condition is rated as excellent, indicating minimal wear, proper alignment, and no major flaws in the chassis or components.

3. **Accurate and Detailed Scale Model**

- MTH is known for producing highly detailed and accurate scale models, with fine attention to period-specific details such as liveries, decals, and body styling.

- The FP45 is a well-documented prototype, and MTH s version captures its distinctive features, including the long hood and distinctive cab design.

4. **Strong Running Performance**

- The FP45 is powered by a high-torque DC motor (or potentially a DCC-compatible motor, depending on the specific version), which provides smooth acceleration and reliable operation on most track layouts.

- The wheel profile and suspension are designed to handle curves well, reducing derailments on tighter trackwork.

5. **Compatibility with Modern Systems**

- The locomotive is compatible with both DC and DCC control systems, making it versatile for different modelers setups.

- The Protosound 3.0 system is DCC-friendly, allowing for advanced sound control via DCC commands if desired.

6. **Livery Options and Customization**

- MTH often offers multiple liveries for the FP45, including classic Union Pacific and Southern Pacific schemes, which adds flexibility for collectors or those building a specific railroad.

- The model can be further customized with additional accessories, such as smoke machines or custom decals.

7. **Proven Durability**

- MTH locomotives are generally built to last, with robust construction and quality materials. The "Tested-Exc IB" status further ensures longevity with proper maintenance.

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1. **Higher Price Point**

- The FP45 is a premium model, and the Protosound 3.0, tested condition, and excellent internal body rating contribute to a higher cost compared to basic or used models.

- For collectors or serious modelers, the investment may be justified, but it could be prohibitive for hobbyists on a tight budget.

2. **Potential for Overkill for Small Layouts**

- While the FP45 is a great model, its size and weight may make it less practical for very small layouts or tight curves.

- Smaller layouts might benefit more from a lighter or more compact locomotive, though the FP45 still handles curves reasonably well.

3. **Maintenance Requirements**

- Like all high-quality models, the FP45 may require occasional maintenance, such as cleaning contacts, checking sound system components, or lubricating moving parts.

- The Protosound 3.0 system, while durable, could potentially develop issues over time, though MTH s reputation for reliability mitigates this concern.

4. **Limited Availability of Replacement Parts**

- As with many premium models, finding replacement parts or accessories (e.g., specific decals, sound system components) may be more difficult or costly than for more common locomotives.

- This could be a concern if the model requires repairs or upgrades in the future.

5. **Sound System Complexity**

- The Protosound 3.0 system, while impressive, may require some setup or calibration to achieve optimal performance, particularly for users new to advanced sound systems.

- Users without DCC may still benefit from the sound, but those using DCC could explore additional features like sound programming.

6. **Weight and Stability**

- The FP45 is a heavier model, which can be an advantage for stability but may require additional track support or ballast on lighter layouts.

- This could be a consideration for modelers operating on older or less robust track systems.

---

### **Conclusion and Recommendation**

The **MTH 30-20537-1 Rail King FP45 Diesel Engine (Protosound 3.0, Tested-Exc IB)** is an outstanding choice for model railroaders who prioritize realism, sound quality, and build quality. Its advanced features such as the Protosound 3.0 system, excellent internal condition, and accurate detailing make it a standout model for both collectors and enthusiasts. The locomotive s strong running performance, compatibility with modern control systems, and durable construction further enhance its appeal.

- **Buy if:** You are a serious modeler with a larger layout, appreciate high-quality sound and detail, and are willing to invest in a premium model. The FP45 is ideal for those who want a realistic, visually appealing, and sonically immersive locomotive that will serve as a centerpiece on their railroad.

- **Consider alternatives if:** You are on a tighter budget, operate on a very small layout, or prefer a simpler model. In such cases, a slightly older FP45 model without Protosound or a different manufacturer s FP45 (such as Bachmann or Life-Like) might offer similar visual appeal at a lower cost.

- **Avoid if:** You are new to model railroading and unsure about the long-term commitment of maintaining a high-end model, or if you prioritize quantity over quality and prefer a more affordable entry-level locomotive.

For most dedicated modelers, the **MTH FP45 in this condition is a highly recommended purchase**, offering a balance of performance, realism, and durability that justifies its price.

Details:

Very faint marks on wheels rollers. Metal handrails horn. Onboard DCC/DCS decoder. Unit measures: 18-1/2 x 2-9/16 4.

Die-cast truck sides, pilots fuel tank. MTH RAILKING 30-20537-1 ELECTROMOTIVE GM FP45 DIESEL ENGINE W PS-3. USED - in box. Operating Protozoic diesel exhaust see note above - not working.

Metal wheels, axles gears. Locomotive speed control in scale MPH increments. Prototypical Rule 17 lighting. Directional controlled constant voltage LED headlights.

Prefects. Box is in really good condition. Engine is in really great shape - don't see any marks, dings or scratches except for a tiny mark on roof right next to smoke unit looks like someone used something pry it open but hardly noticeable. Intricately detailed ABS body.

1:48 scale proportions. Tested forward/neutral/reverse, lights, sound smoke all work great except for unit. But smoke does not work. Metal chassis.

COMBINED SHIPPING for multiple items. NOTE: COULD NOT GET SMOKE UNIT TO WORK - reset to factory setting still won't work don't know if I didn't add enough smoke or.

part #: 30205371 prices

• $249.99-$399.99

specifications gscalemodeltraingi:

• brand: Mth
• mpn: 30-20537-1
• type: Diesel Locomotive
• rail system: Three-rail System
• corporate roadname: Electromotive Gm

offer gscale model traingi:

• options: Ship-to-home
• availability: In Stock
• started: February 6, 2026
• quantity: 1
• sold: 0

general gscale model traingi:

• model Railroads Trains > Railroads Trains > Locomotives
• condition: Used

payments gscale model traingi:

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

seller gscale model traingi:

• city: Franktown, Colorado
• rating: 99.7%
• # reviews: 4614

shipping gscale model traingi:

• service: Standard
• class: Standard
• cost: $30.00
• type: Fixed
• transit: 4-11 Days

returns gscale model traingi:

• policy: No Returns

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