If you mean to drill holes in the black plastic housing that the woofer uses and the PSU sits in, then I would not. The enclosure is a tuned box and there is even a port on it. Drilling holes will make the bass sloppy and you may even hear it whistle too (if the holes are small). So in closing, I would not drill holes in the housing to vent the PSU if it were me.
I think it was McMurtie that brought up the 24v deal, not grandefuturo; but I have to go back and read.
Repair factory PSU:
+better components in place of cheap ones
+easier to do
-under designed (is this overcome with the better components?)
Yes, relative, yes this is overcome with the better components.
+better components with better overload protection
+more modern PSU design
-less volume at higher volume settings if use 12V
-risk of killing the amps if go with -12 V + 12 V = 24 V (how big a risk?, I thought that grandefuturo felt it would be fine to run them at 24V)
relative, relative, yes, yes. The amplifier IC is rated at a MAX voltage of 21vDC. So with the OEM voltage of 19vDC there is no issues, with 24vDC your running it past the maximum rating and I think you will let the smoke out of the IC...
Replace with external wall wart
+Easily replaced if fails down the road
+Thermal issues are gone
-ugly Wall wart
-lower max volume
Yes, yes, yes, some like wall-warts, yes lower volume.
This is the order I would choose for mine.
#1 Rebuild the OEM supply with Japanese quality parts.
#2 Wire up a 12vDC wall-wart and whilst your in there, leave the dead PSU there to keep the same interior air volume and then fill the outside plug there the AC cord went with silicone (or glue from a hot glue gun) so no one can plug an AC cord into it. Add a fuse and if you are really worried you can diode isolate the two rails.
#3 replace PSU with another type.
CAVEAT: I am just a tech and not an Engineer; I don't play one on TV but have stayed at a Holiday Express once. This is just my opnion and 2-cents worth so take it with a grain of salt. I am bad with a math and can't spell very well; but I can sure fix things and have plenty of Engineer friends to bounce ideas off of. Seacrest out...
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