The best w550i acoustic driver

Those expert in modding acoustic

I have found it and I noticed two diffrence between the acoustic of old and the new R4CB020,
The Old R4AB048 has a better bass deliveration but is lacking volume but quality is damn good
comapred to the new. The new has the volume I need but somehow distorted and the volume is crckling cause it cant cope up with the volume, bass are not balanced with the loudness of the volume in mega bass in the R4CB020 acoustic.

Can anyone improve R4AB048 to louder but same quality and balance of the bass. Cause R4AB048 acoustic are the best if only alittle bit louder. I know this is too much but this acoustics are good even in mega bass if only louder. Cause R4CB020 are loud but sounds awful especially in bass.
Here are the files of R4CB020 R4AB048 so you can study them. Thank you

Here are the original acoustics w550i link in forum se-nse:
To All Acoustic Modders and Experts out There I Need Help - SE-NSE Forums

Links of the original acoustics