Quoted from dinot:

Upgrading the backbox speakers is something I highly recommend. The Pro/Prem have 4" single cone speakers that are about $1 and sound awful.
Start with the Pinsound Subwoofer & Line-Out connector for Stern SPIKE. This is a plug&play solution that will give you line-level outputs.
Get the 5.25" adapter plates, either from Speakerlightkits or PinballLife. You can go with the Kenwood KFC-1366s (that Stern uses on the LE), but honestly I think that those are kind of crappy. (Though they are eons better than the Pro/Prem stock speakers). You don't have to break the bank. I like JL Audio or Polks. For Mando I bought Polk Audio DB521.
You don't want to drive those speakers from the amp in the pin. Get an aftermarket amp (which is why you got that Pinsound adapter). I like this one:
amazon.com link »
And don't forget the external sub. I recently upgraded all of my pins to Klipsch Reference R-12SW. They were on sale recently for $150. I bought 6. (So now I have 6 x Polk PSW-10 to unload)
I've done this to all of my pins (Well, except for Mandalorian Premium, but I have all of those parts ready to go when I get it) and they sound fantastic. Interestingly, TMNT was the one that surprised me the most. I didn't expect anything special on that one, but it sounds awesome.

Quoted from dinot:

No. That speaker is pretty cruddy as well. Even a cheapo external powered sub will be better than that thing.
Upgrading that to a better sub is not something I am interested in because a free air sub is not ideal. You want a sub in an enclosure.

Quoted from PiperPinball:

Added some mods.
Baby Yoda mod finally working. (He sleeping when game is not in play). Will add video on Tuesday and more info on making these for sale to everyone.
Fun pin![quoted image][quoted image][quoted image]