Would I be wasting my money to get a turntable?

Talk about diminishing returns…

Cheers 

What happens when your PWM’s oscillator signal frequency is not high enough?

This frequency, likely >0.5MHz limits amp's bandwidth.  My older Icepower was limited to 60kHz, resulting in 20deg phase delay at 20kHz.  It can affect summing of the highest harmonics (that I cannot hear anyway).  Zobel network on the output leaves about 1% of the ripple, but the membranes at this frequency don't move.  This 0.5MHz frequency is about 100 times higher than highest root frequency in music resulting in practically unlimited resolution.  I agree, there are limitations of class D, like of any other class - I was just stressing, that the fact of switching output between two voltage values doesn't make it digital since these constant voltages are not the quantity of interest at this point (duty cycle is).

Couldn't have said it better myself!

Because I have no clue what you're talking about.

This can be fun technics has reasonable turntables at great prices.best buy has some inexpensive you may be able to try it take it back by 15 days.you may have a pre amp with a moving magnet or moving coil stage.then you could go to yard sales ,good will salv army and hunt for vinyl.not the fence type but think of the fun you can have doing this on a budget.then when you think vinyl is art of your streaming,cd system cuz it's fun to change it up.my first turntable was best buy 150 with stylus plug and play now I have 6 all bought used.they hook up to pre amp with phono stage then out of preamp into splitters that take them into class a krell,class a/b michi class h, and multiple class d amps.they all sound great.enjoy the hunt.