I replaced the old preamp in my Woodo B5 bass with Glockenklang 3-Band Electronic - 5 Poti and the quality is magnificent regarding sound, product, usage and feel. My Bass has two Lundgren soapbar humbuckers with one volume knob for each of the pickups and with common bass, mid and treble control.
When everything set to zero, you can't hear the difference between active and passive mode and the noise level is excellent when active. The only complain I have is that the documentation is not very good, but the 'Net have the solutions.
I recommend this product strongly, it's no less than excellent!