GREQ
Headphoneus Supremus
I put some stock Fostex T20RP MKII earpads on my vintage DT990 - This really cranks up the bass.
It's not perfect, there does seem to be a peak/hump in the low-mid bass, but it's not horrible for most genres that would normally suffer if the hump was in the mid-high bass.
It's actually a PERFECT fit, so if you want a darker sound and you've upgraded your Fostex to Shure 840 pads and have the stock pads spare, this might be one to try out.
It's not perfect, there does seem to be a peak/hump in the low-mid bass, but it's not horrible for most genres that would normally suffer if the hump was in the mid-high bass.
It's actually a PERFECT fit, so if you want a darker sound and you've upgraded your Fostex to Shure 840 pads and have the stock pads spare, this might be one to try out.