So, just completed the Speedball upgrade on my year old Crack. It is everything promised, tighter, punchier, more dynamic, lower noise floor. Really a great improvement, buuuuuut, I really relied on the Crack for my relaxing, take a load off, get ready for bed, music listening pleasure. The improvements are great, but doesn’t give me that relaxing feeling I relied on. I know it wouldn't be hard to reverse everything back to stock, buuuuuuut, I really like the Speedball too. It fills another niche I presently don’t have covered - that nice, tight bass. I’m tossing around an idea of putting in a 6 pole selector switch for the 1U, 2U, 4U, 5U, 7U, and 9U connections (3U would remain unswitched and wired to stock and Speedball configurations - ground) to switch between stock configuration and Speedball.
The switch would be mounted on the underside, and just to make it a little more safe I’m planning on installing a limit switch to interrupt power from the plug if the top is removed from the base, maybe with a little extra insulation, just in case. Not saying I would purposely leave power to the plug, its on a switched power strip, but just for defense in depth... So switching would only be possible with the unit powered down.
My only concerns are: 1) thermal concerns. The 3K resistors were mounted under the vents, and probably should be remounted there. Which means the large board would likely need to be relocated. I think if it was moved laterally to be between the headphone jack and the power switch (the 6 pole switch would go there as well) it should all fit. And 2) I’m missing something, can anyone think of a reason why this might not work? My practical electrical experience level is low, and I’d really like others input on this before giving it a shot. $30 in parts will be a lot less expensive than building another Crack.
