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Professor’s Notes

The B9 is how you get real organ weight out of a guitar or bass — the kind that makes a chorus feel finished without adding another guitar track. It’s not a “cute effect”; it’s a second instrument hiding under your hands. Blend it right and it turns simple chords into something huge, soulful, and unmistakably organ-like.

Description

The Electro-Harmonix B9 Organ Machine is a polyphonic organ emulator that transforms guitar or bass into classic electric organ-style tones — no MIDI, no special pickups, just plug in and play. It’s built for players who want that iconic organ behavior: sustained harmony, mix-filling body, and the sense that the band suddenly got bigger.

What it’s for (the one job): instant organ layer — pads, swells, and sustained harmony that make a part feel “produced,” especially in choruses and transitions.

PN’s quick start (a usable default in 30 seconds):

• Start with Dry at 9–10 o’clock and Organ at 1–2 o’clock (let the organ be the point).
• Set Click low (around 9–10 o’clock) for smooth pads; raise it if you want more key attack and articulation.
• Add Mod at 10–11 o’clock for subtle movement — too much can get wobbly fast.
• Put delay/reverb after the B9 for the “Hammond in the next room” feel (a little goes a long way).

Heads-up (so the right person buys it): The B9 rewards clean, confident playing and simpler voicings. If you want your normal guitar tone to stay front-and-center, keep Dry higher. If you want the guitar to become the organ part, keep Dry low and commit.

Specifications

• Polyphonic organ emulator for guitar or bass
• 9 organ-style presets
• Separate Dry and Organ volume controls
• Mod control (rotary/modulation depth or speed)
• Click control (percussive key-click effect)
• True bypass
• Powered by 9VDC adapter (included)