Alctron MC410 for 46$ Aliexpress rocks.
Ultra portable, has already biasing pot, usual components for moding are easy swappable even though it's smd. Way less bright than usual chinese k67. It matches u87 frequency response until 10k even though it's flat circuit. It has higher resonant peak at 14khz instead of usual 10-11k, which i like better and it's easier to address with just one cap from fet to ground. If even necessary. Pcb is really high quality. Plenty of space inside under pcb.
https://m.aliexpress.com/s/item/1110652192.html?spm=a2g0n.search-cache.0.0.611fa0fccWSYaW
Ultra portable, has already biasing pot, usual components for moding are easy swappable even though it's smd. Way less bright than usual chinese k67. It matches u87 frequency response until 10k even though it's flat circuit. It has higher resonant peak at 14khz instead of usual 10-11k, which i like better and it's easier to address with just one cap from fet to ground. If even necessary. Pcb is really high quality. Plenty of space inside under pcb.
https://m.aliexpress.com/s/item/1110652192.html?spm=a2g0n.search-cache.0.0.611fa0fccWSYaW
