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Average Price: $463

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$149

$350+

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Price History

Based on price data from 1 merchant for "AJH Synth GEMINI 2412". Prices shown reflect NEW condition. Tracking began Apr 7, 2026.

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Description

The AJH Synth GEMINI 2412 is the sonic architect's dream, offering a variable dual filter design that brings the classic SEM filter experience to the modular world. Crafted for discerning musicians and sound designers, this Eurorack module provides two identical channels, each ready to sculpt your sound with precision and character. With the ability to seamlessly fade between filter characteristics, the GEMINI 2412 offers unparalleled flexibility for shaping your audio landscape.

The module is engineered to deliver outputs for low, band, and high pass, ensuring a broad spectrum of tonal possibilities. Its common frequency CV input allows for intuitive control over both filters, perfect for synchronized modulation and complex sound design experiments. The switchable parallel and serial operation adds an extra layer of versatility, letting you explore unique configurations and sonic textures.

Whether you're diving into deep basslines, crafting ethereal pads, or experimenting with evolving soundscapes, the AJH Synth GEMINI 2412 is your ticket to musical innovation. Its compact form, measuring 28 TE, makes it an ideal addition to any Eurorack setup, providing powerful filtering capabilities without compromising space.

Key Features:

  • Variable dual filter based on the classic SEM design
  • Two identical channels with fadeable filter characteristics
  • Outputs for low, band, and high pass
  • Common frequency CV input for synchronized control
  • Switchable parallel and serial operation
  • Compact design at 28 TE, perfect for any Eurorack setup

Product specs

Available since March 2018
Width 28 TE / HP

FAQs

What is the main function of the AJH Synth GEMINI 2412 module?

The AJH Synth GEMINI 2412 is a dual state variable filter (SVF) module designed for modular synthesizers, offering versatile filtering options and rich sound shaping capabilities.

Is the AJH Synth GEMINI 2412 suitable for both mono and stereo applications?

Yes, the GEMINI 2412 can be used for both mono and stereo applications, providing flexibility in sound design within modular setups.

How does the AJH Synth GEMINI 2412 differ from other AJH Synth filter modules?

The GEMINI 2412 stands out with its dual filter design, allowing for parallel and serial configurations, which expands the creative possibilities compared to single filter modules.

What are the key sound characteristics of the AJH Synth GEMINI 2412?

The GEMINI 2412 offers classic analog warmth with smooth resonance and flexibility in sound shaping, making it suitable for a wide range of musical styles.

How wide is the AJH Synth GEMINI 2412 in a Eurorack setup?

The AJH Synth GEMINI 2412 occupies 28 HP in a Eurorack modular synthesizer setup.

DivKid

DivKid

AJH Synth - Gemini 2412 Dual Vintage State Variable Filters

Video thumbnail for AJH Synth - Gemini 2412 Dual Vintage State Variable Filters by DivKid

AJH Synth - Gemini 2412 Dual Vintage State Variable Filters

DivKid

DivKid

Video thumbnail for AJH Synth Gemini 2412 Dual Eurorack Filter - How I use it... by DreamsOfWires

AJH Synth Gemini 2412 Dual Eurorack Filter - How I use it...

DreamsOfWires

DreamsOfWires

Video thumbnail for Synthfest 2017: AJH Synth  Gemini 2412 Dual Vintage Filter by sonicstate

Synthfest 2017: AJH Synth Gemini 2412 Dual Vintage Filter

sonicstate

sonicstate

Video thumbnail for AJH Synth GEMINI 2412 REVIEW Dual Eurorack Modular (SEM) Filter Review by SonicVoltage

AJH Synth GEMINI 2412 REVIEW Dual Eurorack Modular (SEM) Filter Review

SonicVoltage

SonicVoltage

Video thumbnail for AJH Synth Gemini 2412 // Synthfest 2017 by DivKid

AJH Synth Gemini 2412 // Synthfest 2017

DivKid

DivKid

Video thumbnail for AJH Synth Gemini 2412 - SynthFest UK 2017 by Sound On Sound magazine

AJH Synth Gemini 2412 - SynthFest UK 2017

Sound On Sound magazine

Sound On Sound magazine

Video thumbnail for GEMINI 2412 User Guide Part 1: The Single Filter (Explaining the individual VCF with audio examples) by AJH Synth Official

GEMINI 2412 User Guide Part 1: The Single Filter (Explaining the individual VCF with audio examples)

AJH Synth Official

AJH Synth Official

Video thumbnail for Patch of The Week: Synth Brass w/ Gemini 2412 - SEM-like sounds inspired by Jarre & 70's-80's by AJH Synth Official

Patch of The Week: Synth Brass w/ Gemini 2412 - SEM-like sounds inspired by Jarre & 70's-80's

AJH Synth Official

AJH Synth Official

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about AJH Synth GEMINI 2412.

Features and functionality

  • The AJH Synth GEMINI 2412 is a dual filter that can be used like a stereo filter with complete control over left/right channels, offering aggressive resonance with back panel jumpers.

    Source

Comparisons

  • The Gemini 2412 is compared to two Xaoc Belgrad filters in terms of price and size, but offers more control with its dual filter design and center mixer section.

    Source

User experience

  • Owners have expressed satisfaction with the Gemini 2412's modulation possibilities and its ability to mimic stereo performance, noting its suitability for complex sound sculpting.

    Source

Use cases and applications

  • The Gemini 2412 is favored for users seeking a filter with extensive modulation options and stereo-like performance for broad sound design capabilities.

    Source

Critic Reviews

AJH Synth Gemini 2412, Mega-Phase 12 and Finaliser R-EQ Review

musictech.com

AJH Synth's Gemini 2412 delivers a lush, versatile sonic palette that expertly pays homage to vintage filter designs while expanding their creative potential. The dual filter setup is rich in tonal colors, making it a standout for sound exploration. However, the output can run hot when self-oscillation is engaged, requiring careful attenuation. The Mega-Phase 12 impresses with its extensive control over phasing effects, although it can introduce some unwanted noise. Meanwhile, the Finaliser R-EQ serves as a solid utility module, enhancing overall signal quality but may not be essential for every setup. At £345 each, these modules are a worthwhile investment for serious modular enthusiasts, given their robust build and unique sound capabilities.

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