if you're referring to the 90s vintage reference 1, i posted a review here a long time aqo here:
https://forum.audiogon.com/discussions/review-kef-reference-model-one-speaker
i'm not familiar with a more recent kef reference 1
https://forum.audiogon.com/discussions/review-kef-reference-model-one-speaker
i'm not familiar with a more recent kef reference 1