Moding the Senn 414 padsI am new to Grado Land (or world if you prefer) so please bare with me. I recently purchased a pair of SR-60s and have be playing with various pads ever since. I purchased a pair of bowl, and 2 pairs of HD414 pads. I love the sound of the bowls (though they lose a little bass over the stock "comfies") but the comfort is unacceptable. The closest I have been able to come to "bowl" sound without using the bowls is to "reverse" mod the 414 pads. Maybe this has been done many times over, but for those not familiar please allow me to explain.
Step 1: Purchase some HD-414 pads directly from Sennheiser (they cost 3-4 dollars a pair, so buy 2 pairs).
Step 2: Place the pads face down (with the hole facing you) on a surface that you don’t mind cutting. I used an old note pad.
Step 3: Take an xacto knife or razor blade and cut a hole in the "other" side that is the same size as the existing hole. This can also be done with scissors, or if you are lucky, a properly sized hole punch.
Step 4: Place the HD-414 pads on your Grados with the original hole facing your ears, and the newly cut hole around the driver cups.
This gives you a clear path from the drivers to your ears, while providing an extra thick layer of padding (since the “back” side of the 414 pad is thicker than the “front”). The sound is a bit more “distant”, both literally and figuratively, than the bowls, but the comfort is much improved.