Features
- Smart all-in-one telemetry
- Full Smart functionality
- Provides Spektrum Smart battery data, input voltage, esc temperature, esc amperage, RPM, and Text Gen Telemetry data over one wire. No additional sensors required
- Includes Spektrum 15T Rebuildable Brushed Motor - Excellent completion option for 1/10 scale on-road and off-road racers running 2S power
- Integrated LED light power outputs for simple installation without the need of additional receiver ports
- Includes 2 LED Light Strings (Red and White)
- 70 Amp continuous power - excellent for 1/10 scale on-road and off-road racing and 1/10 scale crawlers and scalers
- 2S-3S LiPo Compatible
- Waterproof ESC*
- Multiple options for easy programming:
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- Smart ESC Programming Box
- SmartLink USB Updating and Programmer application
- Programming from Transmitter via Text Gen Telemetry
- Multi-point protection:
- Over-current protection
- Automatic LiPo low-voltage cutoff
- Thermal protection
- Failsafe protection
- Developed and designed by SpektrumT engineers, in partnership with the industry's leading ESC manufacturer
- Compact for easy installation in most applications
- Ready to install - no soldering required
- Aluminum heat sink for high efficiency
- Adjustable high-power BEC (6V or 7.4V, 4amp)
- Firmware updatable through the Smart ESC Programming Box
- High heat-resistant ICT connectors, backwards compatible with ECT connectors
- Limited 1-year warranty
Overview
The SpektrumT Firma 70 amp Brushed Smart ESC and motor combo is waterproof and ready to use in most 1/10th scale RC models. Featuring programming options that make it easy to tune for your on-road and off-road racers and bashers.
This ESC and Motor Combo is an excellent choice to complete your 1/10th scale on-road and off-road 2WD racing models running 2S LiPo power. Plenty of speed and tunability for carpet, drift, or asphalt on road racing as with the durability needed for 1/10th off-road racing and bashing.
Like every component in the SpektrumT Smart ecosystem, FirmaT Smart ESCs combine "plug-and-play" simplicity with the ability to communicate with other Smart electronics - together, creating the best-performing RC system for your vehicle imaginable.
Firma Smart ESCs do much more than regulate power. They function like a virtual engineer inside your model, providing a direct path to the vital operating data you need to reach peak performance. Firma Smart ESCs give you an extra layer of confidence that your electronics are all operating at their best.
With Firma Smart ESCs, you'll be better connected to your vehicle than ever before - without installing extra components that all work independently of each other. You won't need extra wires, modules, or links. A Firma electronic speed control provides a one-wire solution for obtaining telemetry data such as motor current, temperature, battery voltage and capacity.
Firma ESCs not only gather the data but also send it to your transmitter in real time, instead of only storing it for after-run study. You're able to adjust settings as needed to boost performance on the go. The Firma Smart single-wire telemetry solution has been tested for quality and performance by the best brands in RC. Their verdict? Smart technology is both simpler and superior!
Video Overview
*Please see manual for Waterproof Usage Guidelines
**See compatibility chart for more information.
Overview
The Spektrum Firma 70A Brushed Smart ESC and motor combo represents an outstanding all-in-one solution for 1/10 scale RC car enthusiasts across the UK. Whether you're building a competitive on-road racer, a drift machine on the carpet, or an off-road basher, this waterproof combo delivers the performance and reliability needed to excel in demanding conditions. The package combines intelligent electronic speed control with a powerful 15-turn rebuildable brushed motor, making it an excellent choice for anyone looking to complete their 1/10 scale 2WD racing model with quality, proven components from Spektrum's trusted engineering partnership.
What sets this ESC and motor combo apart is its integration of Smart technology throughout. Rather than relying on multiple separate sensors and modules that clutter your wiring harness, the Firma 70A uses a single-wire telemetry solution to communicate directly with your compatible Spektrum transmitter. This means you get real-time data about battery voltage, motor current, ESC temperature, RPM and more without the complexity of additional components. It's a solution that has been tested and validated by the best brands in RC racing, proving that Smart technology is both simpler and genuinely superior to traditional setups.
Ready to install with no soldering required, this combo comes complete with everything needed except a battery and receiver. The waterproof design means you can race through dust, gravel, snow and water without concern, whilst the compact dimensions allow it to fit easily into most 1/10 scale models. For racers, bashers and scalers across the UK seeking a professional-grade brushed power system, the Firma 70A combo offers exceptional tunability, protection and performance in a single package.
Key Features
- Integrated Smart Technology — Rather than bolting on separate telemetry modules and sensors, this ESC features built-in Smart functionality that communicates over a single wire, providing battery data, voltage input, ESC temperature and telemetry information directly to your Spektrum transmitter without requiring additional receiver ports or modules.
- Includes Spektrum 15T Rebuildable Brushed Motor — The package comes with a complete 3-pole brushed motor that offers excellent low-cost performance for 1/10 scale on-road and off-road racers and bashers, featuring fully rebuildable design, adjustable timing for both clockwise and counterclockwise rotation, and pre-shaped curved face brushes that require no break-in period.
- 70 Amp Continuous Power Rating — This substantial power output makes the ESC ideal for 1/10 scale on-road and off-road racing, crawlers and scalers, providing the amperage needed for competitive speeds whilst maintaining reliability during extended runs.
- 2S-3S LiPo Compatible — The ESC accepts 2-cell or 3-cell LiPo batteries, giving you flexibility to run either 7.4V or 11.1V packs depending on your model's requirements and your performance preferences.
- Waterproof Design — The all-weather, waterproof construction of this Firma ESC allows it to perform reliably in nearly any terrain and almost any weather condition, whether you're racing in wet mud, dusty fields, snow or shallow water.
- LED Light Power Outputs — Integrated LED light power outputs are built into the ESC, eliminating the need to use additional receiver ports for light strings and simplifying your electrical installation significantly. The combo includes two LED light strings in red and white.
- Multiple Programming Options — You can programme the ESC using the Smart ESC Programming Box for trackside adjustments, the SmartLink USB Updating and Programmer application on a computer, or directly from your Spektrum transmitter if it has Text Gen capabilities, offering maximum flexibility for tuning.
- Advanced Drag Brake Adjustment — The Firma 70A features an extensive range of drag brake adjustability with fine control over both drag brake percentage and drag brake rate, allowing expert-level tuning for crawlers, scalers and rock crawling performance.
- Multi-Point Protection System — Over-current protection, automatic LiPo low-voltage cutoff, thermal protection and failsafe protection work together to prevent damage and ensure your equipment survives the rigours of racing and bashing.
- Adjustable High-Power BEC — The 4-amp BEC (Battery Eliminator Circuit) is user-selectable between 6V or 7.4V output, providing clean regulated power for your receiver and servos with sufficient current for both ports to operate simultaneously.
- Compact Design with Aluminium Heat Sink — The space-efficient form factor and aluminium heat sink ensure efficient thermal management and easy installation in tight spaces within most 1/10 scale RC models.
- Ready to Install, No Soldering Required — The motor comes with wires and 3.5mm bullets already installed, and the ESC uses high heat-resistant IC3 connectors that are backwards compatible with EC connectors, allowing immediate use without any soldering work.
- Firmware Updates Available — The ESC's firmware can be updated through the Smart ESC Programming Box, ensuring you always have access to the latest performance improvements and feature enhancements as Spektrum releases them.
- Ball Bearing Supported Rotor — The motor's rotor runs on ball bearings rather than bushings, ensuring smooth operation, reduced friction and extended lifespan during intense racing and bashing sessions.
- 540 Can Motor Size — This standard 540-size brushed motor fits most 1/10 scale RC car applications, making it an ideal upgrade option and replacement choice for existing vehicles.
Technical Performance
The Spektrum Firma 70A Brushed Smart ESC delivers impressive performance characteristics engineered in partnership with industry-leading manufacturers. The 70-amp continuous current rating with a 200-amp maximum burst capacity provides the power envelope necessary for competitive 1/10 scale racing, whether on-road carpet racing, drift competitions or off-road terrain. The included 15-turn brushed motor features a 540 can size, perfectly matched to 1/10 scale models, and operates with adjustable timing that allows you to optimise rotation direction and performance characteristics for your specific application. Compatibility spans 2-cell to 3-cell LiPo batteries (5-9 cell NiMH or NiCd for traditional chemistry), with the 4-amp BEC capable of powering both receiver and servo outputs. The compact dimensions of just 36mm length, 30mm width and 18mm height allow installation in tight spaces without compromising performance. Built with an aluminium heat sink for efficiency and high heat-resistant IC3 connectors that maintain backwards compatibility with older EC connectors, the ESC is engineered for durability and reliability. The water-resistant construction combined with the brushed motor's rebuildable design means repairs and maintenance are straightforward, keeping your RC car UK ready for the next race or bash session.
What's in the Box
- Spektrum Firma 70A Brushed Smart ESC
- Spektrum Firma 15T Rebuildable 3-Pole Brushed Motor (540 can size)
- 2 x LED Light Strings (Red and White)
- Product Manual (English, German, French and Italian versions available)
What You Need to Complete
- 2S or 3S LiPo battery with EC3 or IC3 connector (7.4V or 11.1V)
- Spektrum Surface Receiver compatible with your transmitter
- Spektrum transmitter for control
- Battery charger suitable for LiPo chemistry
Frequently Asked Questions
- Is the Spektrum Firma 70A suitable for beginners? — Yes, this combo is excellent for beginners moving into more serious RC car UK racing. The Smart technology actually simplifies setup by eliminating multiple separate modules, whilst the extensive programming options allow you to start with basic settings and progress to advanced tuning as your skills develop. The waterproof design and included motor make it beginner-friendly in terms of durability and ease of installation.
- What battery does this ESC require? — The Firma 70A accepts 2-cell or 3-cell LiPo batteries (7.4V or 11.1V respectively) with EC3 or IC3 connectors. It also supports traditional 5-9 cell NiMH or NiCd batteries if you prefer. Using a 2S battery will give you more conservative speeds suitable for learning, whilst 3S provides maximum performance for racing.
- Can I programme this ESC from my Spektrum radio? — Yes, if you have a Text Gen capable Spektrum transmitter, you can programme and adjust the ESC settings directly from your radio without needing additional modules or wires. Otherwise, you can use the Smart ESC Programming Box or the SmartLink USB application on your computer.
- How does the Smart telemetry work? — The single-wire Smart telemetry system sends real-time data including battery voltage, cell balance information, battery capacity used and remaining, motor current draw, ESC temperature and RPM directly to your compatible Spektrum transmitter screen. This allows you to monitor your model's performance while driving and make adjustments without stopping to check separate gauges.
- Is this ESC waterproof, and can I use it in water? — The ESC features waterproof construction that allows it to perform in dust, gravel, snow and water. However, you should consult the product manual for specific waterproof usage guidelines to ensure you're operating within the design parameters.
- What makes this different from the 35T motor combo version? — The primary difference is the motor included in the combo. This model features a 15-turn motor which provides higher RPM and faster speeds, ideal for on-road racing and general-purpose use. The 35T version uses a higher-turn motor for more torque at lower speeds, better suited for crawlers and scalers. Choose 15T for speed-focused racing, 35T for torque-focused applications.
- Does the included motor require break-in? — No, the Spektrum Firma 15T motor features pre-shaped curved face brushes, meaning there is no break-in period required before racing. You can use the motor at full power immediately after assembly.
- Can I replace just the motor or ESC if one component fails? — Yes, both components are sold individually as well as in this combo, and both are designed for easy installation without soldering. The rebuildable motor design also means components can be serviced and repaired.
- What protection features does this ESC have? — The ESC includes over-current protection to prevent damage from sudden current spikes, automatic LiPo low-voltage cutoff to protect your battery from over-discharge, thermal protection to shut down if temperatures exceed safe levels, and failsafe protection to cut power if signal is lost.
- How do the LED light outputs work? — The ESC has integrated LED light power outputs built in, allowing you to connect the included red and white LED light strings directly without using additional receiver ports. This simplifies electrical installation significantly compared to traditional setups.
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 70A Brushed Smart ESC, 2S-3S: IC3 / 15T Brushed Motor Combo 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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