In my experience, spinfits seem to put out less bass since they don't offer as much isolation as other types of tips. I'm still struggling to find IEM tips that are exactly perfect for myself though I really enjoy the spinfits for comfort. Maybe its time to go custom again? For those of you guys who still use these awesome things, what tips do you guys like best? I have actually never used the comply foam before on any of my IEM's so maybe its something to try out?