Hah, the W5000 frequency response looks terrible. I bet your dummy head had the same fit problems with these cans that I did! I had to firmly press the cups against my head, squishing the pads in the process, to hear a sound signature approaching my "normal" favored HD650/L3000 type warmth.
Affixing/half-fitting the too-small W2002/L3000 pads in place of the larger W5000 pads was awkward, but resulted in an in-between sound that was an big improvement over stock, with no active pressing action required. Unassisted & stock, it sounded like that graph indicated - bright, lacking bass, completely un-enjoyable.
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Tannoy rules
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