One customer asked if our pickups incorporate a dummy coil, here's our answer.
Boss Chris Kinman invented and patented our Differential Coil technology and it is used in every Kinman pickup except our humbuckers but will even be there soon too.
So what we have is 2 very different coils, the upper one is the string sensor and it is optimized to produces the best string signal and it also produces unwanted hum. The lower one senses ONLY hum because there is a patented magnetic shield made from special steel isolating the 2 coils from each other and without that the hum sensor would also produce string signal and that's a bad thing since any signal in common is cancelled between the 2 coils.
That's what's wrong with stacks and sidewinders and is the reason they sound so awful. Both coils are identical and both produce hum and string signal and both are cancelled (but because of the proximity effect the string signal is less in the lower coil and therefore it is not fully cancelled).
Our noise sensor is designed to be 3 to 5 times more efficient than the string sensor so we can wind it with thicker wire and fewer turns but it is calibrated to produce the same hum voltage as the string sensor and therefore hum is fully cancelled. Thicker wire and fewer turns means it is a highly transparent coil and has negligible impact on the string signal as it passes through. There are other secret proprietary technologies that we use to maximize the desirable sonic characteristics provided by this ingenious hum cancelling mechanism. Also it allows us to make great sounding pickups that cancel hum which still fit into guitars. An ordinary dummy coil attached to the bottom of an identical pickup makes the whole thing far too tall and will not fit into guitars without cutting the cavity deeper.
So yes, in a way you might say our hum sensor is a dummy coil ,,,, but it's no ordinary dummy in the usual sense that it is just another pickup identical to the one that senses the stings ,,, no sirreee!!! That kind of ordinary dummy pickup system impacts negatively on the sound way too much, robbing expressive dynamics and tonal characteristics from the sound of the pickup in much the same way as switching 2 Fender pickups on at the same time (pos 2 and 4 sound but without the hollow quak). Boss Chris started out trying to perfect a dummy coil system way back in the 1980's but he found so many insolvable problems with that technique that after 10 years of trying and failing he eventually abandoned the concept as fatally flawed and useless. He persevered and went on to bigger and better things and eventually invented and patented a whole new concept based on a new way of thinking about dummy coils. Navigate to >About Us >My Story ,,,, and read a fascinating and inspiring story about how this all happened. It's a really good and entertaining read.
It's weird how things sometimes complete a full circle. Turns out that our patented hum sensors in our pickups make the best dummy coils.
above) High efficiency Laminated Steel hum sensor bobbin from our Telecaster bridge pickup.