This set-up is perfect for duos and trios I perform in. The K & K mini plus pre-phase represents a guitar's true character. I use it with a pedal EQ and a few small adjustments to accommodate any room have been sufficient to satisfy my needs in a medium volume setting. I installed it in a Fender PM-2 all mahogany parlor guitar and am a believer in the K & K concept.
Piezo quack led me to this product and boy does it deliver. I installed this in a Recording King ROS-06 and all I get are loud and warm and clear woody sounds from these pickups. Installation was a breeze and the pre-phase module is easy to use. I picked this one so I don't have to worry about impedance mismatch and cable length and it doesn't disappoint. I compared the preamp sound with wiring the pickups passively and the preamp is completely transparent and quiet noise-wise, great simple circuit. Once I mastered the EQ-ing, the pickups sound amazing, cut the mids, dial in the notch to tame the bass, bring in a HPF around 60-100Hz and you'll be handsomely rewarded with great natural tones. And thank you John for an amazing service.
I've been using K&K pickups for many years. However, I wanted an active pickup with volume control. Adding the Phase reverse is a smart feature. Simple, clean, and powerful signal. If you like the K&K, this is the least intrusive impedance matching internal preamp.