Product Details
The Spektrum Firma Sensored 2-in-1 System is specifically engineered to be used with 10th scale Crawlers and Scalers. Featuring advanced Field-orientated Control (FOC) and professional drag brake performance and torque control, all while being fully waterproof.
Key Features
- Pro-level Drag Brake performance and adjustability
- IP-67 Rated Waterproof System
- Compact for easy installation in most applications
- Ready to install - no soldering required
- Integrated 40A / 160A ESC
In The Box
- (1) Spektrum Firma Brushless Sensored 2-in-1 System 1400Kv
- (1) Product Manual
Needed to Complete
- Spektrum Surface Receiver
- 2S or 3S LiPo Battery with EC3 or IC3 Connector
- Spektrum Transmitter
Key Benefits
2-in-1 ESC Motor Combo: Compact option for detailed scale builds where space is limited
Advanced Sensored Motor Control: Great for slow speed driving and next level drag brake performance
IP-67 Waterproof Design: The IP-67 waterproof system provides industry leading waterproof and dustproof operation for worry-free driving in mud, sand, snow and water
Multi-point Protection:
- Over-current protection
- Automatic LiPo low-voltage cutoff
- Thermal protection
- Failsafe protection
Features
- Pro-level Drag Brake performance and adjustability
- RPM/Throttle Matching enabled
- FOC (Field-Oriented Control) equipped
- Integrated 40-amp ESC (160amp burst)
- 2-3S LiPo/6-9 Cell NiMH input voltage range
- IP-67 rated waterproof system
- Fully programmable with optional Spektrum ESC Programmer Box (not included)
- Developed and designed by Spektrum™ engineers, in partnership with the industry's leading ESC and Brushless Motor manufacturer
- Compact for easy installation in most applications
- Ready to install — no soldering required
- Adjustable high-power BEC (6V or 7.4V)
- Firmware updatable through the Spektrum ESC Programming Box
- High heat resistant IC3 connectors, backwards compatible with EC3 connectors
- Limited 1-year warranty
The Ultimate Compact Crawler Solution
The Spektrum Firma Sensored 2-in-1 System is specifically engineered to be used with 10th scale Crawlers and Scalers. Featuring advanced Field-orientated Control (FOC) and professional drag brake performance and torque control, all while being fully waterproof.
The compact 2-in-1 design grants builders the ability to reduce clutter and components, giving you the most room for scale accessories and customization. The integrated design makes the size similar to a 550 can size motor, making it a easy drop-in option for most 1/10 scale crawler, scaler and trailer models.
Available in a low speed 1400Kv option for extreme slow speed and high angle of attack performance. And a high speed 2300Kv for excellent control for trailers and rock bouncers.
Overview
The Spektrum Firma 2-in-1 Brushless Crawler Motor/ESC: 1400Kv is the ultimate compact solution for 1/10 scale rock crawlers and scalers in the UK market. This innovative 2-in-1 integrated system combines a brushless sensored motor and a 40-amp ESC into one compact package, specifically engineered to deliver professional-grade performance in tight spaces. Whether you're building a detailed scale crawler or preparing for rock crawling competitions, this ready-to-install brushless RC motor system offers exceptional value and reliability for serious hobbyists and experienced drivers alike.
Developed and designed by Spektrum engineers in partnership with the industry's leading ESC and brushless motor manufacturer, the Firma 2-in-1 represents the pinnacle of compact crawler technology. The integrated design reduces clutter and unnecessary components, giving you maximum room for scale accessories and customisation on your 1/10 scale crawler or scaler. At just 550-size motor dimensions, this brushless motor and ESC combo drops into most crawler chassis with minimal modification, making it an ideal upgrade for existing builds or a foundation for new projects.
What truly sets this brushless RC crawler motor apart is its combination of advanced Field-Oriented Control (FOC) technology, professional drag brake performance, and industry-leading waterproof engineering. This isn't a basic brushless system—it's a competition-grade setup that delivers precision control, exceptional torque management, and reliable all-weather operation whether you're tackling muddy trails, sandy dunes, snow-covered terrain, or water crossings.
Key Features
- 2-in-1 Integrated ESC Motor Design — This compact brushless crawler motor and ESC combo is engineered as a single unit, eliminating the need for separate components and saving valuable chassis space. This integrated approach is essential for detailed scale builds where space is at a premium, allowing you to fit more realistic scale accessories and customisation without compromising performance or reliability.
- Advanced Field-Oriented Control (FOC) — The Firma 2-in-1 features cutting-edge FOC technology with a high-precision magnetic encoder and rotor position sensor that provides exceptional 1-to-1 control feel at any speed and any angle. This means your throttle input is matched to the motor's RPM with unmatched precision, delivering smooth acceleration, accurate speed control, and predictable handling on technical terrain.
- Professional Drag Brake Performance and Adjustability — With up to 200% drag power adjustment, this brushless crawler motor gives you expert-level drag brake tuning. Whether your build is lightweight and compact or heavy with scale details, you can adjust the brake performance to keep your vehicle parked at nearly any incline, providing the control needed for steep hillside manoeuvres and technical rock crawling.
- Integrated 40A ESC with 160A Burst Capacity — The ESC features a continuous current rating of 40 amps with a maximum burst current of 160 amps, delivering the power headroom you need for demanding terrain without thermal stress. This power delivery is perfectly calibrated for the 1400Kv motor, ensuring consistent performance and longevity.
- Intelligent Speed and Torque Control — The closed-loop control system maintains torque and RPM levels even as driving conditions change. Whether climbing uphill, descending, driving in wet conditions, or on loose terrain, this brushless RC motor system keeps you in complete control with responsive, predictable performance that adapts to every situation.
- RPM and Throttle Matching Enabled — This feature ensures the ESC matches your throttle input to the motor's RPM with precision, creating a direct relationship between stick movement and vehicle response. This is particularly valuable in crawling scenarios where smooth, controlled acceleration is essential for obstacle negotiation and stability.
- Industry-Leading Waterproof Design — The Firma 2-in-1 system features an IP-67 rated waterproof and dustproof construction that performs reliably in nearly any terrain and almost any condition. Drive confidently through mud, gravel, snow, and water without concern—the sealed electronics protect against moisture ingress while maintaining peak performance.
- Multi-Point Protection System — This brushless crawler motor is equipped with over-current protection, automatic LiPo low-voltage cutoff, thermal protection, and failsafe protection. These safeguards prevent damage from overloads, battery discharge, overheating, and signal loss, ensuring reliable operation and maximum component lifespan.
- Maximum Power Efficiency for Extended Runtime — The Firma 2-in-1 only uses the power it needs to match your desired throttle output, providing substantially more efficient current levels compared to sensorless systems. This superior efficiency translates directly into significantly longer battery life per charge, meaning more trail time and fewer charging sessions.
- Adjustable High-Power BEC — The integrated switch-mode BEC provides 4 amps of continuous current at either 6V or 7.4V, selectable based on your servo requirements. This adjustable voltage output lets you optimise servo performance and responsiveness for your specific build configuration without additional power regulation components.
- Ready to Install — No Soldering Required — This brushless motor comes with pre-installed high heat resistant IC3 connectors that are backwards compatible with EC3 connectors, allowing for immediate installation without any soldering or modification. The entire system is ready for installation straight from the box, saving time and reducing the risk of electrical problems from poor solder joints.
- Fully Programmable with Optional Spektrum ESC Programmer Box — Using the optional Spektrum ESC Programmer Box (V2 required, sold separately), you can adjust a huge range of settings on the trail to suit changing driving conditions. An easy-to-use Smart Link USB updating and PC programmer app is also available for those who prefer computer-based configuration.
- Firmware Updatable Design — The Firma 2-in-1 features firmware updatable electronics through the optional Spektrum ESC Programming Box, ensuring you can access future improvements, bug fixes, and enhancements to performance without purchasing new hardware.
Technical Performance
The Spektrum Firma 2-in-1 Brushless Crawler Motor/ESC combines a sensored brushless motor with 1400Kv rating and an integrated 40-amp ESC into a compact 550-size motor form factor that measures just 1.45 inches (37mm) in outer diameter and 2.28 inches (58mm) in length. Weighing only 201 grams including the wiring and connectors, this integrated system is engineered for 1/10 scale crawler and scaler applications. The motor features a 0.125-inch (3mm) diameter shaft with 0.62-inch (16mm) shaft length, four poles, and sensored commutation for precise speed and torque control. The integrated ESC handles input voltages from 2-3S LiPo or 6-9 cell NiMH battery packs, making it compatible with standard crawler battery options available throughout the UK. With a continuous current rating of 40 amps and burst capacity of 160 amps, the ESC provides the power delivery needed for demanding rock crawling and technical terrain whilst maintaining thermal stability. The high-precision magnetic encoder sensor enables Field-Oriented Control technology, which optimises power delivery at all RPM ranges and ensures smooth acceleration even at extremely low speeds—critical for technical crawling. The IP-67 waterproof rating ensures all electronics are sealed against moisture, dust, and debris, allowing confident operation in wet, muddy, and sandy conditions. Performance is optimised through advanced torque control algorithms that maintain consistent power delivery regardless of terrain conditions, battery voltage, or vehicle loading. The brushless design eliminates brush wear, reducing maintenance requirements and providing consistent performance over extended periods. High heat resistant IC3 connectors with EC3 backward compatibility ensure reliable electrical connections whilst supporting the high current demands of modern crawler builds.
What's in the Box
- Spektrum Firma Brushless Sensored 2-in-1 System 1400Kv (integrated motor and ESC)
- Product Manual (multilingual)
What You Need to Complete
- Spektrum Surface Receiver
- 2S or 3S LiPo Battery with EC3 or IC3 Connector (alternatively 6-9 cell NiMH battery pack)
- Spektrum Transmitter (surface RC radio compatible with Spektrum receivers)
Frequently Asked Questions
- What makes the Firma 2-in-1 better than separate motor and ESC combinations? — The integrated design saves considerable space in your chassis, which is essential for detailed scale crawler builds where every millimetre counts. The matched components work together seamlessly, with the ESC specifically calibrated to the motor's characteristics, delivering superior performance compared to mixing separate components. Additionally, the integrated approach reduces wiring complexity, eliminates potential connection points, and provides a cleaner installation overall.
- Is the Spektrum Firma 2-in-1 1400Kv suitable for beginners? — While this is a professional-grade system with advanced features, its excellent low-speed control and sensored performance make it accessible to builders of all experience levels. The 1400Kv rating is specifically chosen for crawling, providing smooth, controlled operation rather than high speed. However, buyers will need to source a compatible receiver and transmitter, and basic RC knowledge is required for installation and programming.
- What battery does the Spektrum Firma 2-in-1 need? — This brushless motor and ESC system accepts either 2S or 3S LiPo batteries with EC3 or IC3 connectors, or alternatively 6 to 9 cell NiMH battery packs. Most UK RC retailers stock compatible batteries in these configurations. The system includes automatic low-voltage cutoff protection to prevent over-discharging LiPo batteries, extending their lifespan and maintaining safe operation.
- How does the Field-Oriented Control improve crawling performance? — FOC technology provides precise motor commutation based on actual rotor position feedback from the high-precision magnetic encoder. This means the ESC can deliver exactly the right power at exactly the right moment, regardless of speed or angle. For crawling, this translates to smooth acceleration from complete standstill, responsive throttle feel, predictable behaviour on steep terrain, and the ability to maintain constant speed up or down challenging slopes.
- Can I adjust the drag brake performance if my build changes? — Yes, the Firma 2-in-1 features professional-grade drag brake adjustability with up to 200% power available. If you add scale details and weight to your build, or if you change your drivetrain setup, you can tune the brake performance to match. This requires the optional Spektrum ESC Programmer Box (V2) or the Smart Link USB app, allowing on-trail adjustments to optimise performance for your specific setup.
- Is this motor waterproof for water crossings? — The Firma 2-in-1 features an IP-67 waterproof rating, which means it's sealed against water immersion and dust ingress. This allows confident operation through water crossings, muddy terrain, and wet conditions. However, while the motor and ESC are waterproof, other electrical components in your build (such as the receiver) may not be, so ensure your entire system is weather-sealed for full water operation.
- How does this compare to the 2300Kv version? — The 1400Kv model offered here is engineered for extreme slow-speed control and high angle-of-attack performance, making it ideal for technical rock crawling and challenging terrain. The 2300Kv version (available separately) provides more speed and is better suited for trailers and rock bouncers where slightly faster responsiveness is preferred. Choose the 1400Kv for maximum low-speed control and crawling precision, or the 2300Kv if you need additional performance and speed capability.
- What do I need to programme this motor after installation? — The Firma 2-in-1 comes ready to install with factory-optimised settings suitable for most crawler builds. However, for fine-tuning drag brake adjustment, BEC voltage selection (6V or 7.4V), and advanced control parameters, you can use the optional Spektrum ESC Programmer Box V2 (sold separately) or the Smart Link USB PC programmer app. Most users can operate the system successfully without reprogramming, though programmable options are available for those seeking maximum customisation.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the SPM Firma 2-in-1 Brushless Crawler Motor/ESC: 1400Kv P-SPMXSEM1040A today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
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