volume and tone for low Z pickup .....

[hitsware]

Inside one of these :
http://www.amazon.com/Harmonia-020X...qid=1460335574&sr=8-13&keywords=silent+guitar
I have one of these :
Dayton Audio DAEX30HESF-4 High Efficiency Steered Flux Exciter with Shielding 30 mm Exciter 40W 4 Ohm
Suggestions for passive tone and volume ?????????