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Gakken SX-150 Analog Synthesizer

$48.49 Price Tier: Budget

3.5 (7)

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Gakken SX-150 Mark II Analog Synthesizer

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Page last updated Mar 27, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated December 4, 2025.

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Price

$48.49

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Average Price: $48

Budget/Beginner

$500

$1501+

Price Tier

In the Synthesizers category, Gakken SX-150 Analog Synthesizer is priced in the Budget/Beginner range. This is great gear to get started with or for creators on a budget.

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Description

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Unleash your creativity with the Gakken SX-150 Analog Synthesizer, a compact yet powerful tool designed for both budding musicians and seasoned synth enthusiasts. This portable analog synthesizer is praised for its simplicity and unique sound capabilities, offering users a hands-on approach to sound creation. The stylus-controlled interface allows for intuitive manipulation of pitch and modulation, making it an ideal choice for experimental musicians. Whether you're crafting cosmic soundscapes or gritty bass lines, the SX-150's analog circuitry delivers rich, warm tones that are both nostalgic and fresh.

The Gakken SX-150 is housed in a sleek, user-friendly design, featuring essential controls for oscillation, filter, and envelope shaping. Its compact size makes it perfect for on-the-go music production or live performances, fitting comfortably into any setup. Connect it to external gear via the audio input and output jacks to expand your sonic possibilities. The SX-150 also boasts a versatile LFO (Low-Frequency Oscillator), enabling you to add dynamic movement and depth to your sound. Whether you're a DIY synth lover or just diving into the world of analog sound, the Gakken SX-150 offers a fun and engaging experience.

Key Features:

Stylus-controlled interface for dynamic pitch and modulation control
Rich, warm analog sound with a simple, user-friendly design
Essential controls for oscillation, filter, and envelope shaping
Audio input and output jacks for easy integration with other gear
Versatile LFO for added movement and depth in sound creation
Compact and portable, ideal for live performances and mobile production

Videos

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Adam Savage’s Tested

Show and Tell: Gakken SX-150 DIY Synthesizer

Adam Savage’s Tested

Gakken SX-150 Analog Synthesizer - JapanTrendShop

JapanTrendShop

What is This Thing?? Gakken SX-150

Alamo Music Sound Lab

Reviews

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Gakken SX-150 Analog Synthesizer.

Build quality

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Owners note the back panel is made of cardboard, impacting durability.
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Knobs are fragile; excessive force can detach them from the circuit board.
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Features and functionality

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The SX-150 offers a mono output and requires a voltage controller for the EXT. SOURCE input to function properly.
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The SX-150 has two LFO wave shapes, pitch envelope, and button triggers for sweeping the filter and LFO depth.
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Without a proper gate or trigger signal, the SX-150 won't respond to external CV control from common sources like the Behringer CAT or Poly D outputs.
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The SX-150 lacks inherent MIDI input, requiring creative solutions or additional gear for integration with MIDI setups.
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Mods and upgrades

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Users suggest connecting a CV patch cable to the stylus tip for reliable sequencing, enhancing its functionality.
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Users suggest updating the Monotron to enable CV control via jacks, indicating similar mod potential for the SX-150.
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Comparisons

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Compared to the Monotron, the SX-150 offers a similar experience but requires theremin-like skills for melodic play.
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Compared to the Monotron, the SX-150 offers more features and modding potential at a similar price point.
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Use cases and applications

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Ideal for creating unique soundscapes and experimental music, especially when combined with delay effects.
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Ideal for experimentation due to its unique sound and specific characteristics, though not typically used for lead or bass in every track.
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User experience

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Some users find controlling the pitch challenging due to the lack of constraints on the stylus ribbon track.
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Attempts to control the SX-150 with CV from various synths often fail without a proper setup, highlighting the necessity for experimentation and adjustment.
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