I've been using DH Labs Pro Studio bulk interconnect. I needed a 5m balanced connection between my preamp and poweramp, and this works well and sounds great. $11/ft, but they'll email you a discount code for 10% off.
I'm not sure if it is plenum rated though.
https://silversonic.com/products/bulk-wire-and-cable/bulk-interconnect-cable/pro-studio-audio-interconnect-cable/
I'm not sure if it is plenum rated though.
https://silversonic.com/products/bulk-wire-and-cable/bulk-interconnect-cable/pro-studio-audio-interconnect-cable/