Old NAD for ten bucks- to be modded or??

Picked up an old NAD 5340 cd player - circa 1989.
Why? Cuz it was only ten bucks at a thrift shop!! Works fine. Sounds OK - good imaging, kinda soft, weak bass.

Is this easily tweable, modable by an amateur like me? I read that old capacitors can cause bass to weaken - or maybe I just use it as a transport and stick a DAC-AH on it.

Not happy with current DVD player as primary redbook source.