DPA Microphones announced that its N-Series Digital Wireless System with updated firmware will be presented at NAB Show 2026.

The company said the new N-Series firmware provides customers in the U.S. and Canada with Duplex Gap and Guard Band access for a broader usable spectrum.

According to DPA, N-Series users will gain access to the 2 MHz Guard Band and the 6 MHz unlicensed portion of the Duplex Gap with the new firmware. The increased space can accommodate up to 16 additional wireless channels. The company said this is significant for houses of worship, regional theaters, corporate AV environments and other multichannel applications.

“Reliable spectrum is one of the biggest pressures facing customers mixing a broadcast, managing a large event venue or supporting complex productions,” said Christopher Spahr, vice president of sales and marketing, DPA Microphones, U.S. “This update will give engineers more confidence and room to work. By extending what N-Series can access, we offer higher channel counts with greater predictability and less risk of interference in some of the most challenging RF environments. It’s a powerful example of how DPA continues to support its customers with improved performance through innovation and thoughtful engineering. We’re especially excited to demonstrate what this means in real-world applications at NAB 2026.”

DPA said that the Guard Band is a2 MHz segment between UHF Channel 37 and the start of mobile phone downlink spectrum. Any wireless system can operate there at up to 20 mW EIRP without an FCC license. The Duplex Gap is a 10 MHz separation between mobile downlink and uplink frequencies, divided into two segments: 653–657 MHz, where operation is permitted for licensed wireless systems up to 20 mW EIRP, and 657–663 MHz, where operation is permitted for licensed or unlicensed systems, also up to 20 mW EIRP.

DPA said that users who hold the necessary FCC license can take full advantage of the 12 MHz of spectrum. The DPA N-Series accommodates up to 24 additional microphones.

DPA will unveil the update at Booth C4428 at NAB Show 2026.