Firstech Anti-Theft Alarm Control Unit
Firstech FT-CMX-HC Universal Remote Start and Alarm Controller with High Current Harness
Firstech FT-CM9S-HC CM-900 High Current Universal Remote Start Controller Kit
The control unit is the brain of any aftermarket vehicle security system. It receives signals from sensors, triggers the siren, manages the starter-kill relay, and communicates with your remote or smartphone. Firstech, the Washington-based electronics company behind Compustar, has built its reputation on exactly this kind of hardware, and its alarm control modules are a natural fit for owners who want security and remote start working together from a single, upgradeable platform.
Firstech's Approach to Alarm Control Modules
Firstech was founded in Anchorage, Alaska in 1995 and has spent decades refining remote start and security electronics. Rather than treating alarms as a separate product, its control modules are designed as universal brains that can handle security, remote start, or both. That flexibility is the key difference when you compare Firstech with single-purpose alarm brands: you can begin with the functions you need today and add capability later.
The CMX Series Controller
The CMX is Firstech's next-generation universal hardware. It uses a 32-bit ARM processor with flash storage, a step up from the 8-bit processor in the earlier CM-7, which allows more advanced programmability, event tracking, and speed. It supports the full range of Firstech accessories, including the ALARMIT security add-on and FTI T-Harnesses for simplified remote start installation. Depending on the vehicle, a separate bypass module may still be required for immobilizer integration, and professional installation is strongly recommended.
The DC3 Platform
The DC3 control module is built around plug-and-play installation when paired with compatible iDataStart T-Harnesses. It can support remote start from the factory key fob, works with Firstech RF remote kits, and can be extended with DroneMobile telematics for range beyond a typical radio remote. On most vehicles it can handle immobilizer bypass without requiring a key, which reduces the amount of additional hardware an installer needs.
Building a Complete Security System
Firstech control units are designed to grow into a full alarm. The ALARMIT upgrade kit adds a DAS 3-in-1 sensor covering dual-stage shock detection, tilt sensing, and an accelerometer, along with a 105 dB-plus siren, an LED status indicator, and an E-LOCK relay that provides starter-kill protection. When the system is paired with a 2-way LCD remote or the DroneMobile app, you receive an instant notification if the alarm is triggered, so you know about an impact or tow attempt right away rather than when you return to the vehicle.
What to Consider When Choosing
- Vehicle compatibility: Check whether your vehicle needs a T-harness, hardwiring, or a bypass module, and whether it has a manual transmission.
- Security needs: Decide whether you want a controller only or a full kit with siren, shock sensor, and LED.
- Connectivity: DroneMobile support enables smartphone control, tracking, and alerts.
- Installation: These are advanced electronic components, and professional installation helps ensure reliable operation.
To see how Firstech compares across its wider catalog, visit the Firstech brand page, or browse the full Anti-Theft Alarm Control Unit category to compare alternatives from other manufacturers.