Pedals that stack with the Blackstar Unity Bass U500

clean platform takes the driveA clean, high-headroom stage takes on dirt it can't generate by itself. (high headroom → low gain)

Into a high headroom tone, Ashdown Geezer Butler Signature brings a pull toward low gain that's missing

Goes in front of the amp

clean platform takes the driveA clean, high-headroom stage takes on dirt it can't generate by itself. (high headroom → low gain)

The high headroom tone has headroom to spare — Boss ODB-3 leans it toward low gain to fill it in

Goes in front of the amp

clean platform takes the driveA clean, high-headroom stage takes on dirt it can't generate by itself. (high headroom → high gain)

Run EarthQuaker Devices Hizumitas into that high headroom platform and it finally leans toward high gain

Goes in front of the amp

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Boss BF-2 Flanger's lush 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

Goes in front of the amp

shapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain.

Blackstar Unity Bass U500's own high headroom character is the real reason this is worth trying

Goes in front of the amp

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Put Eventide Modulated 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)

Sits in the amp's effects loop

sits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.

Keep Electro-Harmonix Memory Boy Analog 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)

Sits in the amp's effects loop