Could be an issue with the break angle on the bridge. I’d swap a set from your Jazz onto the L1000 though and see what’s up.
On my passive basses I find I don’t mind one bit when the strings start to mellow out. With active basses it starts sounding like a cardboard box when the strings are dead.
My stingrays last maybe 1-2 months with Elixirs while my Pbasses can last 6+ months. I think partially it’s because you’re expecting such a full range sound out of the preamp and with a passive bass it just gets more mellow.
YMMV
On my passive basses I find I don’t mind one bit when the strings start to mellow out. With active basses it starts sounding like a cardboard box when the strings are dead.
My stingrays last maybe 1-2 months with Elixirs while my Pbasses can last 6+ months. I think partially it’s because you’re expecting such a full range sound out of the preamp and with a passive bass it just gets more mellow.
YMMV