Whats the difference between the BassXX and the DaCapo preamps?
The most obvious thing is that the BassXX features a sweepable (parametric) mid frequency control, whereas the DaCapo has a fixed mid frequency. The BassXX has three control knobs: stacked treble/bass, mid amount, and mid frequency. DaCapo has: stacked treble/bass, and mid amount. However, the center frequencies of the bass and treble controls are also different, and the BassXX circuit itself is better. Heiko designed the BassXX and, of course, prefers it. Some players prefer fewer controls, so the BassXX can be configured with a fixed mid frequency or an internal trim pot, to match the DaCapo control layout. You can find more on the BassXX here.
