After making a CMoy and hotrodding my X-Fi, I needed a new project. I’ve had the Altec Lansing MX5021 speakers for a couple of years now and they’re the best ones I’ve owned so far. However there’s one nagging thing about them, speaker hiss. I searched around for modifications on this thing from Head-Fi with no results. Google however, gave me Jimmy’s Junkyard – Altec MX5021 Speaker Mod and Amplifier Mod.
I took after it and decided to first swap one of the op-amps from the stock ST 4558CN to a BurrBrown OPA2134 just as the guide recommended. I had an extra OPA2134 from my CMoy project and a bunch of extra sockets, so I figured what the hey! I’ll mod my speakers too.
The hardest part during the disassembly is unplugging the power supply and the subwoofer cables.
You can see here that I actually tore off the plastic connector. When I tried to push it back on, the traces at the back started to come off. With a few blobs of Loctite superglue, the piece was firmly affixed to the board.
The worst part, is that this glue is on the back side when you remove the panel to access the PCB. So you’ll be tugging away at the connectors and wondering why it’s so difficult to remove… They’re glued!
The BurrBrown OPA2134 in action! I put in a socket so I can later change it to an AD8620 for hopefully even better sound.
Next I will be sourcing some capacitors to replace the stock Samxon ones, and attempting the crossover modification.