Pedals that stack with the Master Effects Manta Ray 2-band Bass Preamp

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

Run Spaceman Explorer 6-Stage Phaser after Master Effects Manta Ray 2-band Bass Preamp in the signal chain, clear of Master Effects Manta Ray 2-band Bass Preamp's own gain stage

Comes earlier in the signal chain

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)

Run Boss OD-1 Overdrive after it and the bright edge settles into something more smooth

Comes earlier in the signal chain

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → warm)

Where this leans bright, Greer Mizuki blue answers back warm

Comes earlier in the signal chain

fills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (bright → smooth)

What Ashdown Velvet Compressor brings here leans toward compressed — that's worth building a pairing around

Comes earlier in the signal chain

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 Master Effects Manta Ray 2-band Bass Preamp's bright voice out front: Line 6 DL4 Delay Modeler goes after Master Effects Manta Ray 2-band Bass Preamp in the signal chain so its warm voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain

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 Suhr Discovery after Master Effects Manta Ray 2-band Bass Preamp in the signal chain, clear of Master Effects Manta Ray 2-band Bass Preamp's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Comes later in the signal chain