Built at a manufacturer’s request: an I2S-capable HDMI cable
Purist Audio Design’s newest cable, the Black Diamond HDMI 2.1, exists because a manufacturer partner couldn’t find a suitable option elsewhere. The company regularly develops products in response to feedback from other manufacturers, and in this case a partner needed an HDMI cable that supported I2S for their equipment and couldn’t find one that met their standard — so Purist built one. On a high-end system, I2S over HDMI is said to deliver noticeably more detail: clearer instrument texture and vocals, thanks to how quickly the data can stream, alongside vivid color and detail on 8K-capable displays. The Black Diamond HDMI 2.1 is available starting at 0.9 metres.
Avalon speakers, Doshi electronics, and the 35th Anniversary Diamond line
Purist Audio Design’s room once again paired Avalon loudspeakers with Doshi electronics, running on the company’s existing 35th Anniversary Diamond cable line — with the new Black Diamond HDMI 2.1 added into the mix this year as the latest addition to that range.
Frequently asked questions
Why did Purist Audio Design develop the Black Diamond HDMI 2.1 cable?
A manufacturer partner told Purist Audio Design they couldn’t find an HDMI cable that properly supported I2S for their equipment, so Purist developed the Black Diamond HDMI 2.1 to fill that gap.
What does I2S support add to an HDMI connection?
According to Purist Audio Design, I2S over HDMI delivers more detail — clearer instrument texture and vocals — thanks to faster data streaming, alongside vivid color and detail on 8K-capable displays.
What length does the Black Diamond HDMI cable start at?
It’s available starting at 0.9 metres.















