KEF 104 speakers


Hi some information if possible, I am thinking of buying a pair of KEF 104aB reference series speakers the seller has informed me that the main drivers have been replaced. The aB series driver (sp1039) are 100 watt where the original 104 (sp1014) was only 50watt, my question is can the 50 watt go in the ab box with the upgraded crossover or is there a possibility the main driver could over heat and burn out, thanks for any help
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