Crestron vs AMX vs Extron: Choosing the Right AV Control System
Choosing a control system platform is one of the most consequential decisions on any AV integration project. It shapes your programming approach, your hardware choices, your troubleshooting workflow, and your long-term serviceability. Three names dominate commercial AV: Crestron, AMX, and Extron.
This is a practical comparison from an integrator's perspective — not a marketing overview. We will cover programming models, RS-232 and serial control capabilities, hardware ecosystems, real-world strengths, and when each platform makes the most sense.
The Short Version
Crestron — Most powerful, most complex, highest cost, largest ecosystem. Choose it for enterprise-scale, complex integrations where customization and long-term scalability matter.
AMX — Flexible, open architecture, strong network control capabilities. Market share has declined significantly but still relevant for existing installations and projects valuing open integration.
Extron — Reliable, consistent, easier to configure. Dominant in education and standardized corporate deployments. Excellent hardware, less programming overhead.
Programming Model
Crestron
Crestron uses SIMPL Windows for graphical logic programming and SIMPL+ for custom C-like code modules. For serial device control, you write RS-232 modules in SIMPL+ that handle command strings, response parsing, and feedback. The 3-Series and 4-Series processors run SIMPL programs compiled from these tools.
Crestron also offers C# programming via the newer VC-4 (Virtual Control) platform, which runs on server hardware and supports more modern development workflows.
The learning curve is steep. Crestron programmers typically complete official training courses and work under experienced mentors before leading projects independently. This creates a barrier to entry but also means Crestron programmers command higher rates and are in consistent demand.
Serial control in Crestron: SIMPL+ modules handle RS-232 beautifully once you understand the framework. The COM port configuration, baud rate settings, and buffer management all live in the SIMPL Windows program. Custom modules for non-standard devices take an experienced programmer 1 to 4 hours to write and test.
AMX
AMX uses NetLinx Studio for programming in NetLinx Basic, a procedural language with C-like syntax. Many integrators find NetLinx more approachable than Crestron's SIMPL/SIMPL+ combination because it uses a more conventional programming model — you write sequential code rather than wiring graphical symbols.
Serial control in AMX: NetLinx handles RS-232 via SEND_STRING and STRING_EVENT commands. The syntax is readable and straightforward. For integrators who prefer code-first workflows, AMX's approach to serial control is often faster to write than Crestron's module-based approach.
Extron
Extron's control processors run GlobalScripter for Python-based programming or use the older Global Configurator Plus graphical tool for simpler installations. Python programming has made Extron more appealing to integrators comfortable with modern languages.
Serial control in Extron: GlobalScripter handles RS-232 through standard Python serial communication patterns. For straightforward device control, Global Configurator Plus handles many common devices through its built-in driver library without requiring custom code.
RS-232 Hardware
Crestron
The CP4 and CP4N control processors provide multiple RS-232 ports — typically 8 ports on the CP4N. Crestron also offers dedicated serial expansion modules (C2COM series) when more ports are needed. The 4-Series control processor line represents the current platform for new installations.
Key RS-232 features: hardware flow control support, configurable baud rates from 300 to 115200, hardware and software handshaking options.
AMX
AMX NX-series control processors (NX-1200, NX-2200, NX-4200) include RS-232 ports as standard. The NX-4200 includes 8 serial ports. AMX also produces the CE-COM2 universal control extender which adds serial ports over IP — useful for extending serial control to remote locations without additional cable runs.
Extron
Extron IPCP Pro processors include RS-232 ports and integrate tightly with Extron's own AV hardware — switchers, scalers, and distribution amplifiers. For installations built heavily around Extron hardware, using an Extron processor simplifies system integration significantly since Extron drivers are built in.
Ecosystem and Hardware Integration
Crestron
Crestron's ecosystem is the largest in commercial AV. Their DM (Digital Media) and NVX (AV over IP) distribution systems, touchscreen interfaces, scheduling panels, occupancy sensors, and lighting control products all integrate natively with Crestron processors. For unified building control — AV, lighting, shading, HVAC — Crestron is the most capable single-platform solution.
The tradeoff is vendor lock-in. Crestron hardware pricing is premium, and mixing platforms adds complexity.
AMX
AMX under HARMAN Professional has maintained strong product quality but reduced market share. Their Incite touchscreens and Modero X panels are well-regarded. AMX's open integration philosophy means their processors work readily with third-party hardware, which is advantageous on projects with mixed equipment from multiple vendors.
Extron
Extron's hardware is widely regarded as extremely reliable. Their touchscreen controllers, button panels, and signal distribution products are common in education and corporate installations worldwide. Extron also provides one of the best free driver libraries in the industry — Global Configurator includes drivers for thousands of third-party devices, reducing custom programming time significantly.
Cost and Programmer Availability
Crestron: Highest hardware cost. Programmers are widely available but expensive. Crestron dealer program requires certification and annual commitments.
AMX: Mid-tier hardware cost. Programmer pool has shrunk as market share declined. Experienced AMX programmers are increasingly rare in some markets.
Extron: Competitive hardware pricing, especially for simpler installations. Programmers are available at various experience levels. GlobalScripter Python programming has attracted a new generation of programmers.
When to Choose Each
Choose Crestron when:
- ▸The client is enterprise-scale with complex integration requirements
- ▸The installation includes Crestron DM or NVX distribution
- ▸Long-term scalability and expansion are priorities
- ▸The client has existing Crestron infrastructure
- ▸Unified building control (AV, lighting, shading) is required
- ▸Budget allows for premium hardware and programming rates
Choose AMX when:
- ▸You are servicing an existing AMX installation
- ▸The project requires open integration with non-standard devices
- ▸The programming team has deep AMX expertise
- ▸NetLinx programming model fits the team's workflow
Choose Extron when:
- ▸The project is education-focused or standardized corporate
- ▸Simplicity and reliability are the top priorities
- ▸The installation is primarily Extron hardware
- ▸Programming budget is constrained and Global Configurator covers most needs
- ▸Python-based development (GlobalScripter) fits the team
RS-232 Across All Three Platforms
All three platforms handle RS-232 device control well. The differences are in programming workflow, not fundamental capability. Any display, projector, DSP, or switcher with an RS-232 port can be controlled by Crestron, AMX, or Extron — it comes down to having the right command strings.
Need the RS-232 commands for a specific device? AV-Command generates exact command strings, serial port settings, and control system code for hundreds of AV devices. Try it free at av-command.com.
The Bottom Line
There is no universally best control platform — each has a context where it excels. Crestron wins on power and ecosystem. Extron wins on reliability and simplicity. AMX wins on open integration philosophy and programming accessibility.
The most important factors are your team's expertise, the client's existing infrastructure, and the project's complexity. Match the platform to the project, not the other way around.
Related Guides
- ▸Panasonic Projector RS-232 Commands
- ▸Extron RS-232 Control Guide — SIS Protocol
- ▸Sony BRAVIA Professional RS-232 Commands
- ▸NEC Display RS-232 Commands
- ▸Kramer Switcher RS-232 Commands — Protocol 2000 & 3000
- ▸Crestron SIMPL+ Serial Control Guide
- ▸Biamp Tesira RS-232 and Telnet Control
- ▸QSC Q-SYS External Control Protocol
- ▸AMX NetLinx Serial Control Guide
- ▸RS-232 vs IP Control in Commercial AV
- ▸[Crestron vs AMX vs Extron: Control System Comparison]
Free RS-232 Tools
Baud rate reference, device settings table, terminator guide, and DB9 pinout — all free, no signup required.
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Need exact command strings for a device not covered here? [AV-Command](https://av-command.com) includes free RS-232 troubleshooting checklists and a free tools reference — no signup required. The AI Assistant generates exact command strings, serial port settings, and Crestron SIMPL+ code for hundreds of devices instantly.