BOSS FZ-3 Bass mods???

[Koeda]

Aloha all -
Remember seeing a mention about this pedal, but not the deets on how to mod for bass. Have happened upon one, should have soon. Any one have a go at this one. Can't find a schematic bossarea.com has expired... Post a pick of the board when it arrives.
Thanks in advance - David

 

[ChristoMephisto]

The FZ3 is a Fuzz Face style pedal with a BMP tone circuit. Should be easy to find a schematic. There are other sources than boss area (miss that forum, that is now stompboxzone)
Here's a link to some mods
https://www.thegearpage.net/board/index.php?threads/boss-fz-3-modding-help-needed.1414453/

 

[Koeda]

Right on - appreciate the info & reply. Schematics elusive, but did find. Familiar w/BMP stack so will check that and do the usual input cap bass rolloff change. Should be here in a day or two. Happy w/my BD-2 mods and hope to get good results w/FZ Fuzz.

 

[Koeda]

Finally getting to this project. Looked at the tone stack - looks like a voltage divider type extra resistor (R29 on attached) than the typical BMP Tone Stack sitting between R1 and C1 before the R3 on the Tone Stack Calculator. Same value as R1 Any clue how this effects the curve? My guess is it would basically limit the sweep on the pot to limit treble cut.