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Old 01-11-2017, 02:09 AM
DavidHKennedy DavidHKennedy is offline
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Join Date: Sep 2014
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I know I'm a good 6 months late to the party, but you can always solder a 1M resistor from hot to ground if you want to better match the Presys impedance to that of a JJB or K&K or similar passive transducer. I'm sure it's been said before with people doing this with their K&Ks, but I figure I will expand on this further.

By soldering a resistor from hot to ground you are creating resistance parallel to that of preamp, thus reducing its impedance. Most Fishman pres have an input impedance of 10-20M, whereas pickups like the JJBs or K&Ks work best with around 1M impedance. By adding the 1M resistor in parallel to the preamp you are reducing the impedance to roughly 909K-952K (close enough).

You would use this formula to determine the value of resistor you will need:

Rtotal = (R1 x R2) / (R1 + R2).

I'm about to order a Prestige 330 system with 15mm pixels to install into a Presys Blend preamp, because I feel like a SBT and an internal mic will provide the most natural amplified tone to me. I'll let everyone know how that goes.
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