Originally Posted by Valois
What makes soapbar pickups more favourable over single coils?
Well, probably better handled over in the Sadowsky thread, but very quickly, the stock J pickups used in the Sadowsky J basses are humcancelling pickups, not single coils. They, of course, are voiced to mimic single coils but to do it without the hum when a pickup is solo'd. You lose a touch of midrange complexity with the HC J pickups, but pick up a bit more deep low end and upper treble. If you get an NYC model (only available direct from Sadowsky, and big bucks) you can spec true single coils for no additional charge.
The Sadowsky Modern is a very different instrument from the J. Different body, 24 frets, slightly sleeker neck profile, and as you mention, soap bars. More impactful than just soapbars is the non J pickup position (i.e., those soaps are stacked close to the bridge). This brings out even more midrange punch that was mentioned above.
VERY different instruments, so do your homework. The Sadowsky Modern is more similar to the Ken Smith and Roscoe basses than the Sadowsky J.
Hope that helps
You should move over to the Sadowsky Mega thread in the 'bass' section of the site. Lots of good folks over there, including Roger Sadowsky himself.