| Those look like normal Neutrik D-series holes. Neutrik's serieses are at the end of their base model numbers, so that's NC3MD and NC3FD -- in contrast with the P series, which is older and uses Switchcraft holes.
The D-size cutout has become a standard; Neutrik use it for Speakon (NL4), Powercon, Ethercon, and virtually all other panel-mount connectors developed after the D series. Because so many things fit it, it's very universal.
All that said, and with a look at their website, they sell many Neutrik series. I'd suggest looking at Neutrik's website directly for the differences between each series, but most likely NC3FD and NC3MD, possibly with the -B or -BAG suffixes for black shell and black shell with gold contacts respectively, are what you want. |