Presonus Eureka MODS.
Presonus does not put part numbers on the board so identification is by approx location.
- Replace the 2 socketed chips with better ic's (OPA627(My fav), OPA602, LT1357, or LME49710NA)
- Replace the 6 bipolar 47u capacitors with 470uf bipolar capacitors of the same voltage. (1 near the input, 2 near the compressor, 3 near the output)
Input transformer MoD:
- Replace the input transformer with a Jensen JT-11K8-APC transformer
Note: You will need to change your impedance selection resistors. Jensen will give you the info when you place the order for the transformer.
- If you're good at replacing surface mount parts and have the proper equipment then you could change all of the 14 pin MC33079 chips for LME49740NA, OPA404, or OPA4227 chips
Disclaimer: I encourage people to DIY and I'm here in a informative role.
Here are some pictures from some mods.
ModDefecation is about making equipment sound better, providing knowledge and support, repairing that awesome piece of gear, and custom builds. Send me you questions or Ideas.