The Ware for June 2025 is a Gentner EFT-900A frequency shifter for radio audio applications. According to Chris Combs, “it lets two parties send and receive ‘full-range audio’, whatever that means, compressed and then decompressed via the usual 300-3500hz phone line”. Even though Per named the ware first, I will give the prize to Kienan because the response addresses the theory of operation of the ware – shifting the audio up/down by 250Hz so that low-end audio isn’t lost on analo...
