Just wanted to share my experience with Schatten Design Mini Pre 2 pre-amp/blender. I used it to mix Ehrlund and Wilson on my DB. Overall it sounded nice, however the very bottom was lacking a little bit. I measured the frequency response and it proved the unit exhibits a gentle (approx. 6db/oct) low cut filter starting approx. at 200 Hz. While this may be beneficial for someone who needs to roll off some bass, I can't recommend the blender in general for use with an upright bass. Sadly this technical detail cannot be found in product documentation. Hope this report will save some time and money to other folks who seek the ideal DB pickup blender.