I choose the Altec Lansing ACS33 (2.1) many years ago as I could not convince myself to invest on a pair of nice Klipsch speakers for the PC ($700+ vs about S$135 for the ACS33)!
|ACS33 2.1 PC speakers|
Hence I decided to investigate possibilities on improving the ACS33.
|With bottom half of the sub uncovered|
|Closeup of PCB (after substitution)|
- replace the 1uF EC with a poly (yellow)
- replace non-essential 1uF with poly (orange)
- replaced 4x0.22uF (green) poly with 0.15uF Vishay BC (grey) - makes largest audioble difference
- replaced the 2 caps for filtering power supply with Rubycon 2,200uF
- add a heatsink to the voltage regulator as it gets hot
- changed a few caps on the right side of the pix (though not really necessary)
Bass was firm and quite respectable. High and mids sound pretty decent (to myself)! Don't think I will be shopping for a replacement anytime soon...