Presonus HP4 modifications

This was my first major modification project, something I've been meaning to post about for the last couple of years––it's morphed over time, I've added and removed components as I learned from other projects. The Presonus HP4 is an excellent and powerful headphone amp, and can be found for cheap on Ebay, Reverb, etc. I …

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Rokit 5 G3 Limiter and Stand-by/Mute removal

Finally I got around to figuring this out. Had to poke around a little bit. Ran across this schematic in the land of diy forums. It's for the G2 Rokit 6 amps, which had the notorious black goo of death problem, so totally different design (well, probably not that different... these budget companies never really …

KRK Rokit 5 G3 Modifications

This was not my first major modification project (my first was an old Presonus MP4 headphone amp, AMAZING, which I might write about another time), but it was significant insofar as these are my studio monitors, and I basically wasn't using them. They're just not clear enough. Muddy and incoherent, kinda bland, can't hear anything …