I did. Here is a quick measurement showing how the Pads alter the Frequency Response. The Blue line represents the XL Pads and the Orange line are the stock pads.Did you ever have a chance to test those pads?
Generally the larger pads increased the bass response and created a treble peak between 5-6kHz.
The XL pads are certainly more comfortable and the added bass output isn't too bad but I do think they sound excellent with the stock pads.