Pedals that stack with the Blackstar Unity Bass U500

Ashdown Geezer Butler Signature

Into a transparent tone, Ashdown Geezer Butler Signature brings the low gain it's missing

Boss ODB-3

The transparent tone has headroom to spare — Boss ODB-3 gives it low gain to fill it with

Marshall Guv'nor

Marshall Guv'nor's mid-forward fills in what this high headroom tone doesn't make on its own

Boss BF-2 Flanger

Boss BF-2 Flanger's analog warmth voice goes after Blackstar Unity Bass U500 in the signal chain — it's not there to compete with Blackstar Unity Bass U500's own high headroom character

Lab Ratz 3D Boum Warming Unit

Lab Ratz 3D Boum Warming Unit's own low gain character is the real reason this is worth trying

Binson Echorec Delay

Put Binson Echorec Delay in Blackstar Unity Bass U500's effects loop, clear of Blackstar Unity Bass U500's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Dunlop MXR M299 Carbon Copy Mini

Dunlop MXR M299 Carbon Copy Mini's own voicing points at a clean amp's front end, and Blackstar Unity Bass U500 delivers it — goes in the amp's FX loop (or last, into a clean amp)