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 2300Kv
- (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 2300Kv is a game-changing integrated system specifically engineered for 1/10 scale rock crawlers and scalers. This is a ready-to-run brushless RC motor and electronic speed controller combined into one compact unit, eliminating the need for separate components and making it the perfect choice for builders who want a clean, space-efficient setup. Whether you're tackling rocky terrain, competing in crawling competitions, or enjoying weekend trail drives, this 2-in-1 system delivers professional-grade performance with advanced sensored motor control, exceptional drag brake adjustment, and industry-leading waterproof design.
Developed and designed by Spektrum engineers in partnership with the industry's leading ESC and brushless motor manufacturers, the Firma 2-in-1 represents the cutting edge of crawler technology for the UK RC market. The 2300Kv variant is specifically optimised for excellent control on trailers and rock bouncers, giving you the speed and responsiveness needed for dynamic driving. The integrated design makes the unit roughly the same size as a traditional 550 can motor, meaning it drops into most 1/10 scale crawler, scaler and trailer models without extensive modifications. This is not just a convenience feature—it's a genuine advantage for detailed scale builds where space is at a premium and clean wiring is essential.
Unlike standard sensorless systems, the Firma 2-in-1 features advanced Field-Oriented Control (FOC) technology combined with high-precision magnetic encoder and rotor position sensing. This means you get 1:1 throttle-to-motor control at any speed and any angle of attack, providing unmatched precision whether you're creeping over boulders or navigating technical courses. The sensored design ensures smooth operation at ultra-low speeds whilst maintaining complete control in challenging driving conditions, making it ideal for serious crawling enthusiasts, competitive drivers, and hobbyists seeking the best brushless RC crawler motor available.
Key Features
- 2-in-1 Integrated Design — The combined brushless motor and ESC in a single unit saves space and reduces wiring complexity, making installation cleaner and easier in compact crawler chassis designs where every millimetre counts.
- Field-Oriented Control (FOC) — This advanced sensored motor technology provides extremely precise throttle matching and RPM control, giving you predictable, linear driving feel at any speed and maintaining exceptional control even at ultra-low creeping speeds.
- Professional Drag Brake Performance — The Firma system offers an enormous range of drag brake adjustability with up to 200% drag power, allowing you to tune your crawler to hold position on steep inclines regardless of vehicle weight or drivetrain configuration.
- Integrated 40-Amp ESC with 160-Amp Burst Capacity — The integrated electronic speed controller is powerful enough for demanding crawling situations whilst remaining compact and protected within the sealed motor housing.
- Industry-Leading Waterproof Design — With full waterproof and dustproof operation, the Firma 2-in-1 performs reliably in mud, sand, snow and water, giving you confidence to drive in virtually any terrain without fear of water damage.
- Intelligent Closed-Loop Torque and Speed Control — The sensored system maintains consistent torque and RPM levels even as driving conditions change, providing stable power delivery whether climbing uphill, descending downhill, or dealing with loose or wet traction.
- Maximum Power Efficiency — The intelligent control system only draws the current needed to match your desired throttle output, resulting in substantially longer battery life compared to similar sensorless systems and more efficient operation overall.
- RPM/Throttle Matching Enabled — The sensored encoder ensures your throttle input matches the motor's actual RPM precisely, eliminating the spongy feel of sensorless systems and delivering crisp, responsive control.
- Multi-Point Protection System — Built-in over-current protection, automatic LiPo low-voltage cutoff, thermal protection and failsafe protection keep your system and battery safe during demanding off-road use.
- Adjustable High-Power BEC — The onboard 6V or 7.4V adjustable voltage regulator provides clean, stable power to your receiver and servo, eliminating the need for a separate BEC unit.
- IC3 Connectors with EC3 Backwards Compatibility — The high heat-resistant IC3 connectors are compatible with standard EC3 connectors, offering flexibility whilst handling the power demands of sensored brushless crawling.
- Fully Programmable Settings — Using the optional Spektrum ESC Programmer Box (sold separately), you can fine-tune all settings trackside to suit changing conditions and preferences.
- Firmware Updatable — Keep your system current with the latest features and improvements by updating firmware through the Spektrum ESC Programming Box.
- Ready to Install — No Soldering Required — The Firma 2-in-1 comes fully assembled and ready to drop into your chassis with quality connectors, eliminating tedious soldering work.
- Compact 550-Size Profile — At just 1.46 inches (37mm) outer diameter and 2.28 inches (58mm) in length, this motor fits easily into tight spaces designed for traditional 550-size motors.
Technical Performance
The Spektrum Firma 2-in-1 Brushless Crawler Motor/ESC is engineered to deliver serious performance in demanding off-road conditions. The 2300Kv motor specification provides an excellent balance of speed and control for 1/10 scale crawlers, trailers and bouncers, with the sensored brushless design delivering smooth, predictable power delivery across the entire throttle range. The integrated 40-amp continuous ESC with 160-amp burst capacity handles the demanding requirements of rock crawling, where sudden traction changes and steep angles require precise power management. The unit operates on 2-3S LiPo batteries (7.4V to 11.1V) or 6-9 cell NiMH packs, giving you flexibility in battery choice and the ability to tune performance to your specific vehicle setup. The four-pole motor design provides the optimal torque characteristics for crawling applications, whilst the 3mm diameter shaft fits standard motor mounts and accessories. Constructed from high-quality materials with a professional waterproof seal rated to IP-67 standard, this system will handle mud, water spray, sand and extreme weather conditions without compromise. The total unit weighs a mere 201 grammes including connectors, making it one of the lightest integrated solutions available whilst maintaining the structural integrity needed for serious use. Whether you're navigating rocky British terrain, competing in crawler championships, or simply enjoying the hobby at a high level, the Firma 2-in-1 delivers the precision, durability and reliability that serious enthusiasts demand from their brushless RC crawler motor.
What's in the Box
- Spektrum Firma Brushless Sensored 2-in-1 System 2300Kv (motor and ESC integrated)
- Product Manual (multilingual)
What You Need to Complete
- Spektrum surface receiver (compatible with your radio system)
- 2S or 3S LiPo battery with EC3 or IC3 connector, or 6-9 cell NiMH battery pack
- Spektrum compatible transmitter/radio system
Frequently Asked Questions
- Is the Spektrum Firma 2-in-1 suitable for beginners to RC crawling? — Yes, the Firma 2-in-1 is excellent for beginners because the sensored motor control and closed-loop feedback system provide stable, predictable performance that is easier to learn on than sensorless systems. The intuitive throttle-to-speed matching means you won't experience the spongy feel of cheaper alternatives, and the adjustable drag brake helps you develop good crawling technique by keeping your rig stable on slopes.
- What is the difference between the 2300Kv and the 1400Kv versions of the Firma 2-in-1? — The 2300Kv variant is optimised for trailers and rock bouncers where you want more responsive speed and control at normal driving angles, whilst the 1400Kv version is designed for extreme slow-speed crawling and vehicles that are set up for very high angles of attack, delivering better torque control at ultra-low speeds.
- What battery do I need for the Spektrum Firma 2-in-1 2300Kv? — This system accepts 2S or 3S LiPo batteries (7.4V or 11.1V respectively) or 6-9 cell NiMH battery packs. A 2S LiPo is the most common choice for 1/10 scale crawlers, offering good power and runtime. The integrated BEC can be adjusted to provide 6V or 7.4V output to power your receiver and servo.
- Is the Spektrum Firma 2-in-1 waterproof for river and water crawling? — Yes, the Firma 2-in-1 features industry-leading waterproof and dustproof design with full water resistance, allowing it to perform reliably in mud, sand, snow and water. However, like all electronics, it should not be permanently submerged and should be rinsed and dried after use in water.
- Can I adjust the drag brake on the Firma 2-in-1? — Absolutely. The system features professional-grade drag brake adjustability with up to 200% drag power range, allowing you to tune how much braking force is applied when you release the throttle. This is essential for crawling, as it helps keep your vehicle stable and stationary on slopes. Adjustments can be made using the optional Spektrum ESC Programmer Box.
- Does the Firma 2-in-1 need a separate speed controller? — No, the ESC is fully integrated into the motor housing. The 40-amp continuous ESC is built-in, eliminating the need for a separate controller unit and saving valuable space in compact chassis designs.
- What makes sensored brushless better than sensorless for crawling? — Sensored systems like the Firma use internal sensors to monitor rotor position and speed, providing perfectly matched throttle control at any RPM. This means smooth, predictable power delivery even at ultra-low creeping speeds, whilst sensorless systems can be unpredictable at low speeds. For crawling where precision is critical, sensored is significantly better.
- Is the Spektrum Firma 2-in-1 compatible with my existing RC transmitter and receiver? — The Firma 2-in-1 is a motor and ESC only; it requires a compatible Spektrum surface receiver to work with your Spektrum transmitter. You will need to have or purchase a receiver with your radio system. It is not compatible with receivers from other brands.
- What does Field-Oriented Control (FOC) mean and why does it matter? — Field-Oriented Control is an advanced motor control algorithm that monitors the magnetic position of the motor rotor in real-time using the built-in encoder. This allows the ESC to deliver perfectly smooth, linear power that matches your throttle input precisely at any speed. For crawling, this means you get responsive, predictable control that helps you navigate technical terrain with confidence.
- How long will I get on a single battery charge with the Firma 2-in-1? — Runtime depends on battery capacity, driving style and terrain, but the Firma's efficient sensored control system typically delivers 25-45 minutes of driving time on a standard 5000mAh 2S or 3S LiPo battery, with longer runtimes than comparable sensorless systems due to intelligent power management.
- What programming options are available for the Firma 2-in-1? — The Firma 2-in-1 is fully programmable using the optional Spektrum ESC Programmer Box (version V2 required, sold separately). You can also use the Smart Link USB app for PC-based programming. Adjustable parameters include drag brake strength, BEC voltage, throttle curves, acceleration and more.
- Is soldering required to install the Spektrum Firma 2-in-1? — No, the Firma 2-in-1 comes fully assembled and wired with quality connectors. Installation requires only basic RC car assembly skills—simply mount it in your chassis and connect the battery and receiver connectors. No soldering work is needed.
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: 2300Kv P-SPMXSEM1040B 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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