Had some problems installing it, the guys called me right away and guided me through. Amazing..

I installed this preamp in a 1991 Modulus TBX 6. It is equipped with Bartolini P4 pickups and I was thinking about swapping them out as they didn’t seem that clear and present. However, before I did that, I decided to change the preamp that came with the pickups to the East Uni. I am really glad that I did. The sound of the bass has just opened up in a fantastic way. My reason for selecting the Uni was to get the active blend. It makes such a difference to buffer each pickup before they get combined. John’s designs are always fantastic and this is no exception. I have yet to dig into the internal options, so much versatility! Highly recommended.

Max was fantastic. Very helpful and shipped the parts out immediately.

I was looking for a John East Uni Pre to upgrade my bass and Fat Bass Tone had the exact option I needed. Fast shipping and great customer support means I will be back for any future bass needs.

I replaced the Aguilar OBP-3 preamp in my Lakland 55-94 with a Uni-Pre 5-knob. The Uni-Pre install is very straightforward and the only soldering required was to add a 3-way coil selector switch for the MM 5.4 pickup. All components (boards/pots/knobs/packaging/documentation) are premium quality. It does take a while to dial in the lower/upper bass and treble frequencies, but there is a really good guide on Talkbass to get you started: https://www.talkbass.com/threads/the-john-east-preamp-club.984491/page-44#post-27722891. The extended setup time is a small price to pay for such a flexible preamp. I'm very satisfied and I'd put this preamp at the top of the list for any custom build going forward.