Living in a remote location where trying gear is expensive and time consuming the last thing you want to do is throw ideas on the wall to see what sticks. Which is all you can do here.
Only advice worth getting is do everything you can with what you have right now. First, to figure out what sounds like what. To narrow down as much as you can to the culprit.
Try different speaker locations. Try different interconnects. Or if you don't have spares try moving around the ones you do have to see how they sound with different components. Try tweaking your turntable, cartridge, shelf, footers, etc, etc. Try listening to a lot of different recordings. They are not all the same you know, and you did say "some" LPs.
Then you might try a few things that are cheap and easy and known to work. A sand bed under the turntable, cost next to nothing to try. Piece of sorbothane or other squishy material under the turntable or other component. Not offered as solutions, just some stuff to get you going. The more of this you do, even if you don't solve your problem you definitely will learn a lot more about your system and what affects the sound and what does not. So at least then if you still want to change or upgrade something you won't be totally in the dark any more.
Only advice worth getting is do everything you can with what you have right now. First, to figure out what sounds like what. To narrow down as much as you can to the culprit.
Try different speaker locations. Try different interconnects. Or if you don't have spares try moving around the ones you do have to see how they sound with different components. Try tweaking your turntable, cartridge, shelf, footers, etc, etc. Try listening to a lot of different recordings. They are not all the same you know, and you did say "some" LPs.
Then you might try a few things that are cheap and easy and known to work. A sand bed under the turntable, cost next to nothing to try. Piece of sorbothane or other squishy material under the turntable or other component. Not offered as solutions, just some stuff to get you going. The more of this you do, even if you don't solve your problem you definitely will learn a lot more about your system and what affects the sound and what does not. So at least then if you still want to change or upgrade something you won't be totally in the dark any more.