The seller his off his bloody rocker. He describes the speakers as efficient @ 82.5 db and in good condition.
While these speakers are a true classic for near-field monitors they are very far from efficient, especially as they are rated at 15ohms.
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Are those "port straws" original ? They look it but I've not seen that on a commercial speaker before http://www.ebay.co.uk/itm/Pair-of-Vi...item3cd751384a
Yes, I remember Celef using them in their designs.
Those Celef Monitors are worth grabbing at that price considering the excellent condition. I'd buy them if I had room for them.