Aftermarket fuse for subwoofers?

What post?

I've got some that are 2x, 3x. For what its worth I would keep for a spare before I'd sell. They will replace if one blows but there's the mail lag and listening to the factory fuse after getting used to Orange is hard.

I had Blue first, now Orange. Also have five subs in a DBA. https://systems.audiogon.com/systems/8367  Clearly they do make a difference. However, not equally as much in everything. The vast majority of the improvement seems to be in opening up detail and dynamics, but not so much the deep bass. A lot of the improvement seems to be due to improved timing and reduced smearing of transients. Exactly the sort of thing you'll be hard pressed to notice with deep bass. Even the power cord used on the subs seems marginal, or at any rate way less obvious than on anything else. Ditto interconnects. So I never even tried them on my sub amps. 

If I was buying right now I would get what was needed for components I thought it would make a difference, and take the bonus as extra. Don't sweat the values. Hate to tell you, they are not accurate anyway. Not even.