Right now I have my choices of preamps for my Fender Precision Special narrowed down. I can go with either an Aguilar OPB-1 with a Volume, Bass, Treble, passive/active toggle switch or a Mike Pope Flexcore with a Volume, Midrange, stacked Bass/Treble, passive/active toggle switch. The Aguilar is over $100 cheaper plus I like Sadowsky preamps (which this is very similar to) so I'm leaning towards it, but are there any fans of the Mike Pope preamps out there that think it would be that much better than the Aguilar? The treble frequency of the Pope pre seems high at either 6 or 10 kHz vs. 4 kHz of the Aggie. Bass frequencies are similar at 40 Hz for the Aggie and either 46 or 90 Hz for the Pope.