Quoted from Markharris2000:

If using an external sub, you took a different approach and probably getting all the low-end you can handle! That said, I like the self-contained approach, which leaves the machine identical to the way it shipped from the manufacturer and can be sold without needing any explanations about extra boxes.
Looking at the installed picture you can see I did not add any type of amplifier and just moved the two wire connector from their OEM speaker to my CXX8 (some simple testing showed me that the built-in cabinet speaker amplifier has plenty of power... it was just missing the way to get the power out effectively). In a previous note I showed the Kicker DSC40's I installed in the backbox (uses the same 4-inch mounting), and coupled with the CXX8, I wanted to show a $75 all-in upgrade for the top and bottom that makes a big difference.

Quoted from Markharris2000:

The machine's settings can be set to 4 ohm or 8 ohm. Premiums are set to 8-ohms with horrible 4-inch OEM speakers. LE's are set to 4-ohm with much better 5-1/4" speakers. (Some audiophilers will tell you you'll get a faster responce with lower ohm speakers). In this application I don't think ohms or size makes a big difference, but the absolute quality of the speaker DOES make a difference. The Kicker DSC40's are amazing, and mount in the EXACT same bolt pattern on the Premium without requiring and new LE-style mounting plates. You could find some 8-ohm speakers, but I preferred to use similiar speakers as those used in the LE (which are 4-ohm) but get the 4-inch version.

Quoted from fooflighter:

I FIXED this permanently by using a heat gun (you could also use a hair dryer)... Remove raptor from playfield..Wrap a rubber band around arms, apply very small, and I emphasize small short blasts of heat, let cool, unwrap and check.. May have to do repeatedly to get proper alignment but eventually you can get the right arm not more centered and won't have the hang up issue again