2.4 GHz Wireless Systems vs. Digital UHF

Digital wireless microphone systems are the go-to solution for many content creators—and for good reason. They allow on-camera talent to move around freely and without restriction. They help maintain a clean, uncluttered environment and you don’t have to worry about getting tangled up or tripping over cables.

However, despite their many advantages, wireless mics do have one notable drawback: signal interference. Because wireless mics commonly operate in the 2.4 GHz range, their signal is prone to radio frequency (RF) interference, which can lead to static, audio dropouts, and other signal disruptions.

Fortunately, there are ways to minimize signal disruptions and ensure great audio takes, including upgrading to a professional-grade digital UHF system.

2.4 GHz Wireless Systems

While it’s true that digital wireless mic systems can operate in various frequency bands across the RF spectrum, most operate in the 2.4 GHz range—and for good reason. For starters, 2.4 GHz technology is cheap. There is a plethora of inexpensive 2.4 GHz wireless options out there to choose from. Secondly, it’s accessible. Most of these affordable options are easy to set up and use thanks to commonplace features likes automatic pairing, intuitive UI, and travel-friendly designs.

However, as mentioned, 2.4 GHz systems do have one notable drawback which is that they're susceptible to signal interference. The reason they’re vulnerable is because this technology is used by tons of other electronics—everything from Wi-Fi and Bluetooth devices to microwave ovens and garage door openers operate in the 2.4 GHz frequency range, making it very crowded. Because of this congestion, using a 2.4 GHz system can be a bit of a crap shoot, especially in places where other consumer devices are in operation—which is much of planet Earth.

Digital UHF Wireless Systems

As an alternative to 2.4 GHz, many newer digital systems utilize the UHF spectrum. Now, technically speaking, 2.4 GHz is part of the UHF spectrum, but traditionally what we’re referring to when we talk about UHF is below 1 GHz, often in the 470 to 616 MHz range—this is where most digital UHF systems operate.

The Sennheiser EW-DP is a great example of a digital wireless system that operates in the UHF spectrum. Unlike 2.4 GHz wireless systems, the Sennheiser EW-DP doesn’t have to compete with an overabundance of signals operating in the same space. The lack of interference ensures signal strength and makes it easier to overcome obstacles and record at longer operating ranges.

As far as accessibility goes: Some users might find it daunting to choose a UHF frequency band for their wireless system—something you don’t need to worry about with 2.4 GHz models. But that doesn’t really need to be difficult. For example, the EW-DP offers automated setup, frequency coordination, operation, and monitoring, removing virtually every hurdle you might encounter.

Closing Thoughts

When it comes to choosing digital wireless system, there are some key differences between 2.4 GHz and UHF systems you should keep in mind. Inexpensive, convenient, and easy to use, 2.4 GHz technology provides a cheaper but ultimately less reliable solution. For mission-critical projects, a digital UHF system may cost a bit more, but a system like Sennheiser’s EW-DP is still very easy to use and offers users a more reliable option, especially when you’re shooting in places with a lot of Bluetooth, cell phone, and Wi-Fi action.

Got any questions or comments about digital wireless microphone systems? Let us know in the comments section below or reach out to us online or over the phone—we’re always happy to help.