Boss GEB-7 Bass Equalizer

Boss GEB-7 Bass Equalizer — Graphic EQ Tuned for Bass

The Boss GEB-7 Bass Equalizer is a 7-band graphic EQ pedal built around the frequency spectrum of the electric bass. Its 50Hz to 10kHz range reaches deep enough for 5- and 6-string basses while keeping top-end articulation. The pedal is the right choice for bassists who need a stomp-switchable EQ to shape tone between songs or venues.

What Sets the GEB-7 Apart

Unlike a generic guitar EQ, the GEB-7 dedicates three of its seven sliders to the 400Hz, 500Hz, and 800Hz midrange region — the area that defines a bass's fundamental character. A level control knob turns the pedal into a clean boost or volume cut for solo sections.

Seven EQ Bands — Frequency Range

Each band can be raised or cut by up to 15dB, enough range to compensate for boomy rooms or thin cabinets.

• Sub-Band: 50 Hz — deepest sub-bass rumble
• Body Band: 120 Hz — fundamental weight
• Three mid bands at 400 Hz, 500 Hz, and 800 Hz — dedicated sliders for growl, saturation, and presence
• Top Bands: 4.5 kHz (narrow Q) and 10 kHz (shelf) — articulation and shimmer

Connectivity and Power

Standard 6.3 mm TS jacks on input and output make the GEB-7 drop-in compatible with any bass rig. Power comes from a single 9V battery or the Boss PSA-series AC adaptor.

• Input: 6.3 mm TS jack — standard instrument-level input
• Output: 6.3 mm TS jack — feeds amp, next pedal, or DI
• Runs on a 9V battery or PSA-series AC adaptor — 30 mA draw, alkaline battery life approx. 18.5 hours
• Bypass: Buffered bypass — preserves signal through long cable runs

Compact Boss Stompbox Construction

The GEB-7 uses the standard Boss compact chassis — an aluminum die-cast enclosure with a stomp switch rated for 100,000 repetitions, FET switching for silent operation, and a non-slip rubber base.

• Dimensions: 73 × 129 × 59 mm — standard Boss compact footprint
• Weight: 400 g (including battery) — solid feel without weighing down a board
• Backed by a 5-year BOSS warranty