Quoted from KozMckPinball:Only real issue I have with the earlier models is the sound is weak. I guess from reading here that the CGC upgrade to the larger DMD has a speaker upgrade in it, but it could have been better out of the factory without needing an upgrade cost.
I was surprised by how weak the sound was on my standard as well. Pinwoofer was the best bang for the buck addition to this machine in my opinion. Best part is I had it in my hands less than 2 days after I ordered it.
https://pinside.com/pinball/forum/topic/new-amplified-subwoofer-kits-by-pinwoofer#ctop