I used to have a Pieree Josephs magnetic pickup on my upright. Magnetic pickups get alot of output, but not alot of tone. You could turn it up until the rumbling got too much to take. You had to buy it from the company directly.
A few years ago, I bought a custom hand made magnetic pickup - mixer from Canada. It cost 2 or 3 times the price of the Pierre Josephs. Inspite of all the bells and whistles, I think the Josephs sounded better.
I also have a Fishman 360 piezo pickup with a Fishman preamp on my Kay bass. It feeds back, but I don't use that bass for high volume situations. The tone is really good.
In short, I'd recommend the Pierre Josephs for highr volume, and the Fishman 360 for medium and low volume situations.
Good Luck
