I just got a pinsound for tspp and have the same question.

I bought the Pinsound speakers along with a pinsound board for my STTNG. I highly recommend the kit. It’s awesome. There’s also RCA audio outs from the pin soundboard and I had that running through a Nakamichi stereo amplifier to some bowers and Wilkins speakers for a while too and that was awesome as well. But the stock speaker kit from pinsound is great! Subwoofer is great too!

You can buy the same speakers Pinwoofer uses (he lists them on his website). I believe Flipper Fidelity and some other places sell adapter rings and cabling separately to hook them up. I’m considering doing this for my TZ that has Pinsound but haven’t tried yet. I have a few Pinwoofer systems though that sound great and see no reason the speakers wouldn’t be a nice upgrade with Pinsound.

I have not noticed as much improvement out of changing B/W speakers versus changing the newer Stern back box speakers. I also believe the TSPP speakers are pretty heavy duty compared to the newer cheaper Stern back box speakers. I would leave original in at this point and see if you like the results.

You can always change out the speakers per above recommendations after.

I changed out my WPC89 sound board with the Pinsound +. Then changed out the stock speakers with Flipper Fidelity Speakers. Yes, I noticed a difference from the 29-year-old stock speakers. Next, I added the Pinsound Shaker. A lighted speaker kit was added after that. Finally, with 6 soundtracks to choose from, I needed an easy way to change tracks without having to open the coin door each time. So, I added the Pinsound headphone jack that allows you to externally adjust the volume of the speakers, and change tracks. I did this over a year's progress, as it did not hurt as financially, if I did it all at once. I am happy with my choices and would do it again.

The cheaper alternative would have been to have all the Caps replaced on the original sound board and lived with just the original soundtrack and callouts. I really appreciate all the people that put in so much time create alternative soundtracks and callouts. That takes real talent.