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Spektrum Firma 2 in 1 Brushless Cr (Spektrum XSEM1040B | SPMXSEM1040B)
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Model: Spektrum XSEM1040B
Dist. #: SPMXSEM1040B   SKU: SPMXSEM1040B

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Expected Availability: Early March

List Price:  $199.99
Price:  $149.99
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Updated on Jan 24, 2022 12:27:10 AM

Firma 2 in 1 Brushless Cr...

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Key Advantages
2-in-1 ESC Motor Combination: Compact choice|choice|alternative} for comprehensive scale builds where area is limited
Advanced Sensored Motor Control: Great for sluggish speed driving and next level drag brake performance
IP-67 Waterproof Design: The IP-67 water resistant system offers market leading water resistant and dustproof operation for carefree driving in mud, sand, snow and water

Multi-point Defense:

Over-current security

Automatic LiPo low-voltage cutoff

Thermal security

Failsafe security


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 ranked water resistant system

Fully programmable with optional Spektrum ESC Programmer Box (not consisted of)

Established and created by Spektrum™ engineers, in collaboration with the market's leading ESC and Brushless Motor manufacturer

Compact for easy installation in many|many|a lot of|the majority of} applications

All set to install — no soldering needed

Adjustable high-power BEC (6V or 7.4V)

Firmware updatable through the Spektrum ESC Programming Box

High heat resistant IC3 ports, in reverse compatible with EC3 ports

Restricted 1-year warranty

The Ultimate Compact Spider Option
The Spektrum Firma Sensored 2-in-1 System is particularly engineered to be utilized with 10th scale Spiders and Scalers. Including innovative Field-orientated Control (FOC) and expert drag brake performance and torque control, all while being completely waterproof.

The compact 2-in-1 design grants home builders the capability to minimize clutter and components, providing you the most room for scale devices and personalization. The integrated design makes the size comparable 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 choice for severe sluggish speed and high angle of attack performance. And a high speed 2300Kv for exceptional control for trailers and rock bouncers.

Field-oriented Control

Field-oriented Control
The Spektrum Firma Sensored 2-in-1 System features a high-precision magnetic encoder and rotor position sensing unit that offers exceptional 1 to 1 control feel when driving at any speed and at any angle. Completely matched for trail driving, rock crawling competitions and rock racing setups. This improvement in sensored motor control enables the ESC to match your throttle input to the motors RPM with unequaled precision.

Smart Speed and Torque Control

Intelligent Speed And Torque Control
The Spektrum Firma Sensored 2-in-1 System offers a closed loop control, ensuring that the esc maintains torque and RPM levels even as driving conditions alter. Providing extraordinary control when driving uphill or downhill and even when in wet or loose traction conditions. No matter the surface, the Spektrum Firma Spider system keeps you in complete control.

Optimum Power Effectiveness Offers Longer Battery Life

Maximum Power Efficiency Provides Longer Battery Life
When driving with the Spektrum Firma Sensored 2-in-1 System, drivers are much better equipped for the long trails ahead. The Spektrum Firma Sensored 2-in-1 System only uses the power it needs to match your desired throttle output, offering considerably more effective existing levels and incredibly long battery life when compared with comparable sensorless systems.

Pro-Level Drag Brake Change

Pro-Level Drag Brake Adjustment
The Spektrum Firma Sensored 2-in-1 System features a huge range of drag brake adjustability, permitting drivers to skillfully tune their spiders and scalers depending upon their driven train and automobile weight. Allowing approximately 200% drag power, no matter the setup, the Spektrum Firma Sensored 2-in-1 System can keep your automobile parked at nearly any incline.


The all-weather, water resistant design of Spektrum™ Firma™ ESCs enables them to carry out in nearly any surface under practically any conditions. Firma ESCs keep you going through dust, gravel, snow, and water.

High-adjustability Programming Options

High-adjustability Programming Options
Utilizing the Spektrum ESC Programming Box (version V2 needed) , you can easily alter settings on the trail to match driving conditions. A user friendly Smart Link USB Upgrading and PC Programmer app is also available.


Application: 1/10 Rock Spider

Auto Cutoff: Yes

BEC Voltage: 6V/7.4V Adjustable, Continuous Existing 4A (Switch Mode)

Connector Type: IC3

Forward: Yes

Input Voltage: 2-3S LiPo, 6-9 Cells NiMH

Optimum Burst Current: 160A

Optimum Continuous Existing: 40A

Motor Size: 550-Size

Motor Type: Brushless - Sensored

Number of Poles: 4

Outer Size: 1.46" (37 mm)

Overload Defense: Yes

Item Length: 2.28" (58 mm)

Item Weight: 201g (including wire plug)

Programmable: Yes

Reverse: Yes

RPM/Volt (Kv): 2300Kv

Shaft Size: 0.125" (3 mm)

Shaft Length: 0.63" (16 mm)

Water-Resistant: Yes
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