Speaker "loses power"? have to crank up volume for it to work again
I got my hands on kind of a "vintage" stereo tuner (Philips FT 885) and a pair of 60w speakers (Sony SS-A 300). Audio quality is great but when playing stuff at a lower/normal volume, sometimes one of the speakers or both stop outputting audio and I have to crank up volume and for it to work again.
I've used the set a couple times at parties and worked perfectly at max volume but using it at home watching youtube/movies at low volume this happens and it's been bugging me for a long time.
I'm guessing it's the stereo's fault but I don't wanna mess with it since I have no experience with this kind of stuff and don't wanna waste money on it if I can fix it myself.
Any ideas what could cause the issue and what could be done about it?