Your MB301 Has Secret Settings. Here's the Map.

The MXR Bass Synth MB301 is one of the most powerful bass synth pedals ever made — and most players are only using half of it.

Every knob on the MB301 hides a second parameter. Your envelope might be broken — or it might just be pointing the wrong direction. Your tracking issues? Probably one setting you've never touched.

This free field guide fixes all of that.

The MXR Bass Synth MB301 Field Guide gives you a print-ready, board-ready reference that covers everything the manual skips:

• The complete Secondary Parameters Map — every hidden setting behind every knob, what it actually does, and when to use it
• The 5-Step Tracking Fix — in order of impact, so you stop chasing ghost triggers and lost notes for good
• 4 Starter Tones with exact settings — Funk Quack, Deep Sub Bomb, Ambient Pad, and Aggressive Rock, ready to build right now
• The most misunderstood parameter explained — Filter Envelope Amount, and why your envelope sounds wrong (and how to fix it in 10 seconds)
• Active vs. passive bass guidance, signal chain placement, and a signal flow diagram so you can actually diagnose problems

Print it. Tape it to your board. Never open the manual again.

Free. Instant. No BS.