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Teisco SX-400

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3 Critic Reviews

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Page last updated Aug 10, 2025

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Description

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Dive into the world of analog synthesis with the Teisco SX-400, a vintage-inspired synthesizer that marries classic sound with modern capability. This versatile synth is designed for musicians who crave the authentic warmth and depth of analog oscillators. With its robust build and intuitive layout, the SX-400 is perfect for both studio musicians and live performers alike.

The Teisco SX-400 offers a wide range of sound-shaping options, allowing you to craft everything from lush pads to punchy bass lines. Its 32-key keyboard is both dynamic and responsive, providing tactile feedback that enhances your playing experience. The SX-400 is equipped with multiple waveforms, enabling a broad palette of tones to explore. Its filter section includes resonance and cutoff controls, giving you the ability to sculpt and mold your sound with precision.

Connectivity is key in the modern musician’s toolkit, and the SX-400 doesn’t disappoint. With MIDI in/out options, it integrates seamlessly with your existing gear, making it a versatile addition to any setup. Whether you’re a seasoned synth enthusiast or just beginning your journey into analog soundscapes, the Teisco SX-400 offers a blend of nostalgia and innovation that will inspire your creativity.

Key Features:

Authentic analog oscillators for warm, rich sound
32-key dynamic keyboard for expressive playing
Multiple waveforms for diverse sound creation
Comprehensive filter section with resonance and cutoff controls
MIDI in/out for seamless integration with other gear
Suitable for both studio and live performance environments

Videos

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Alex Ball

The Peculiar World of Teisco Synthesizers

Alex Ball

TEISCO SX-400

MIxbern

Teisco SX-400 Sound Demo

Lackan

TEISCO SX-400 analogue synthesizer.

adamstan84

Jupiter 4 vs. Teisco SX400 chorus comparison.

Lackan

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 Teisco SX-400.

User experience

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Owners describe the Teisco SX-400 as an "alive organic machine," highlighting its unique sonic character.
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Value and pricing

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Acquired by one owner for the price of a "couple of pizzas" in the mid-2000s, indicating potential undervaluation in the current market.
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Setup and maintenance

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Faders on the Teisco SX-400 can be very stiff, requiring potential maintenance for smoother operation.
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Critic Reviews

Teisco SX400 [Retrozone]

soundonsound.com

The Teisco SX-400 is a curious relic from the analog synthesizer era, notable mainly for its missed potential. Despite boasting four independently-tunable VCOs and intriguing features like aftertouch and a stereo Ensemble effect, its gutless filters and sluggish envelopes make it a sonic underperformer. The SX-400's notable drawbacks, such as a lack of waveform mixing options and cumbersome design, overshadow its few redeeming qualities. While it can produce some unexpectedly pleasing sounds and offers more sound-shaping capabilities than some contemporaries, its impracticality and rarity make it a synth more suited to collectors than musicians seeking reliable performance.

negative

Full Review

Teisco SX-400 (EMM Jan 82)

muzines.co.uk

The Teisco SX-400 synthesizer shines with its versatile polyphonic capabilities and rich sound palette, making it an attractive choice for those entering the realm of polyphonic synthesis without breaking the bank. Its standout features include pressure sensitivity and a variety of playing modes, which add expressive potential to performances. The ensemble effect enhances its stereo presence, despite some minor background hiss. However, the lack of an arpeggiator is a noted omission, and the absence of a protective lid might require additional investment in a flight case. Overall, the SX-400's robust build and innovative programming features offer great value for its price, appealing to both synth enthusiasts and performers alike.

positive

Full Review

Teisco SX400 (12T Nov 82)

muzines.co.uk

The Teisco SX-400 synthesizer attempts to offer versatility with its multi-mode polyphony and numerous controls. However, its bulky design and lack of standout features make it a cumbersome choice. The sound quality disappoints with weak filters and flimsy oscillators, and the chorus ensemble unit is notably noisy. Programming is standard but outdated, lacking intuitive controls found in other contemporary synths. The SX-400’s second touch feature is less effective, and without an arpeggiator, it falls behind lower-priced competitors. Despite a sturdy build, its high price tag is unjustified, especially when compared to more capable alternatives like the Korg Polysix.

negative

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