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Yamaha GEY-201 Graphic EQ

Yamaha GEY-201 Graphic EQ

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Issei Noro

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Page last updated Jul 18, 2026

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Description

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Yamaha GEY-201 Graphic EQ

The Yamaha GEY-201 Graphic EQ is a seven-band graphic equalizer module designed for the Yamaha PSE-40A Professional System Effectors. It provides precise frequency shaping through dedicated sliders, allowing users to fine-tune the tonal balance of guitars, basses, keyboards, and other line-level instruments within Yamaha's modular effects system.

With ±15 dB of boost or cut available on each frequency band, the GEY-201 is well suited for correcting tonal imbalances, reducing feedback, enhancing clarity, or tailoring an instrument's response for different amplifiers, speakers, or performance environments.

Key Features

Plug-in graphic EQ module for the Yamaha PSE-40A
Seven-band graphic equalizer
±15 dB boost/cut on each band
Individual frequency sliders
Master output level control
Designed for instrument and line-level signal processing

Controls

100 Hz
200 Hz
400 Hz
800 Hz
1.6 kHz
3.2 kHz
6.4 kHz
Master

Technical Specifications

Model: Yamaha GEY-201
Type: Graphic Equalizer Module
System: Yamaha PSE-40A Professional System Effectors
EQ Bands: 100 Hz, 200 Hz, 400 Hz, 800 Hz, 1.6 kHz, 3.2 kHz, 6.4 kHz
EQ Range: ±15 dB
Master Control: Output Level

The Yamaha GEY-201 is one of the utility modules in the PSE-40A ecosystem, offering straightforward equalization without altering the instrument's natural character. Its carefully selected frequency bands make it equally effective for subtle tonal adjustments and more pronounced sound shaping in both live and studio environments.

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Artist usage

See how Issei Noro uses Yamaha GEY-201 Graphic EQ

Issei Noro

Guitarist

Casiopea

Verified via Photo

A noroism Instagram archive post about Issei Noro’s October 1987 post-Platinum setup shows a Yamaha graphic EQ module in his Yamaha PSE-40A modular effects system. The correct Yamaha PSE-series model is most likely the GEY-201 Graphic Equalizer.

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

Japanese Jazz Fusion

Deep Jazz Fusion

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Used With

Based on how musicians on Equipboard use Yamaha GEY-201 Graphic EQ, it is most commonly used with the following gear.

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See also: Equalizer Effects Pedals, Yamaha, Yamaha Equalizer Effects Pedals

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