@charles1dad Thanks for the additional information about Wharfedale. Given JA's report about those low impedance values, I'd pass on Wharfedale. This was something which steered me away from the Focal 936, and Tvad pointed it out to me. I could *hear* the suck out. Such impedance dips are not good for my amps really -- easily -- driving those speakers. I am determined to avoid them, and there are a variety of speakers which can satisfy that requirement.
Those following this thread closely might look here, an interesting brochure on Apertura speakers.
Note the comparison chart at the bottom. I heard the Edena (89db) and it was driven by a powerful solid state (Goldmund integrated -- Telos 7) and sounded magical. Not sure how they’d sound with tubes.
Take a look at the Adamante and Enigma MKII speakers. 93 and 95db sensitivity, MTM configuration with ribbon tweeter. https://apertura-audio.com/wordpresssetup/wp-content/uploads/2021/02/Apertura_Brochure_A4L-12pp_FINAL-WEB.pdf

