Is there any merit in having the split half humbuckers of a standard P-bass switchable between series and parallel? If so, can someone help with wiring config for a 2 or 3 way mini switch to achieve this?
"The best way to do it...is to do it." - Amelia Ehrhard
In a normal humbucker, in parallel the tone will be brighter (1/4 the net inductance compared to series) and the output signal will be lower.
I was going to say the output signal would be half, but that would only be half of the time.
It's not like a "normal" humbucker in that each coil is only active for half of the strings. In series, the active (as in under a vibrating string) coil is sending its output thru the inactive other coil (inductor). In parallel, the active coil is sending its output across the inactive other coil (as in a load).
This really is two separate pickups that sense two separate strings each.
When strings over each half are vibrating, the model for each driving coil is the same. There isn't the common signal generated in each coil from each string.
I tried it; it doesn't make any difference that I could hear except the parallel is slightly quieter.
That's about right, probably 6 dB down.
For frequencies above the knee.............
Sorry I didn't respond earlier, I just spotted this topic for the first time.
Some time ago, I did this mod on a customer's MIM P-Bass, and the tone did change a bit. The highs were more evident in parallel (providing that the Tone control was set at 9 or 10), and the mids were a bit more punchy in series (regardless of where the Tone control was set). The bottom octave was pretty much a wash, no noticible difference between series or parallel.
All of that was subjective opinion, I didn't haul out the any of my test equipment and do any formal testing.
Long story short, unless you botch the appearance of whatever switching mechanism you install, then doing the mod won't hurt the axe. If you like it, great! If you don't like it, don't use it, simple as that.
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