Bryan Reilly playing a Mellotron Micro at the 45 Factory.

When it comes to synthesizers, there are a lot of great options out there. From the warmth of analog circuits to the flexibility of digital synth engines, today’s synth landscape offers an incredible range of options. Thankfully, you don’t need to spend a fortune to get your hands on a world-class synthesizer.

In this guide, we’re highlighting the best synthesizers under $3,500, including modern analog designs, forward-thinking digital instruments, and timeless recreations of iconic vintage synths. If $3500 is still out of your budget at the moment, be sure to check out or blog about the best synthesizers under $1500

Moog Muse

Moog Muse

Price: $3499

One of the hottest synths on the market today, the Moog Muse is an eight-voice, bi-timbral polyphonic analog synth that combines Moog’s analog heritage with cutting-edge digital controls. Equally at home in the studio or on the stage, Muse features a 61-key semi-weighted full-size Fatar keybed that feels solid and responsive under your fingers.

With dual analog VCOs per-voice derived from Minimoog Voyager circuits, a dedicated voltage-controlled modulation oscillator, and an array of creative effects like Diffusion Delay, the Muse is the perfect blend of vintage charm and modern flexibility.

Mellotron M4000D

Mellotron M4000D

Price: $2800

The Mellotron M4000D brings the iconic tape-based keyboard into the modern era while staying true to its legendary sound. Pre-loaded with 100 instantly recognizable sounds captured directly from the original Mellotron and Chamberlin libraries, it offers everything from the classic flutes and choirs to more obscure patches, all complete with authentic tape character.

Its 37-note Mellotron-style wooden keyboard is a dream to play, while its versatile tone controls let you blend two sounds with the Mix knob, shift playback speed and pitch for unique textures, and fine-tune with Bass and Treble adjustments.

Mellotron M4000D Mini

Mellotron M4000D Mini

Price: $2000

If you’re looking for something smaller, lighter, and even more affordable than the M4000D, the M4000D Mini will be right up your alley. It offers the same features, sounds and front panel controls as its larger sibling, but instead of the M4000D’s wooden keyboard, it includes a high-quality, semi-weighted Fatar piano-style keyboard with velocity sensitivity, and no aftertouch.

Mellotron M4000D Rack

Mellotron M4000D Rack

Price: $1600

If you’re looking to add the classic Mellotron sound to your studio, check out the rack-mountable M4000D Rack.

Teenage Engineering OP-XY

Teenage Engineering OP-XY

Price: $2299

The Teenage Engineering OP-XY is a versatile synthesizer, sequencer, and sampler that’s perfect for recording in the studio, performing on stage, or creating on the go. With a unique synth engine, a 64-step sequencer, and a full library of built-in effects, the OP-XY has everything you need to start creating right out of the box.

Expressive E Osmose 

Expressive E Osmose 

Price: $1799

The Osmose is an awesome synth in its own right, with a powerful EaganMatrix sound engine developed by Expressive E and Haken Audio that combines physical modeling, FM synthesis, and more into over 500 expertly crafted presets. But the real draw is its innovative gesture controls that completely reimagine how you interact with a keyboard. 

Full-size keys with 3-dimensional MPE control let you manipulate sound using familiar gestures like pressing, bending, and shaking, opening up a unique way to create effects such as strummed notes, vibrato, legato, layered dynamics, and more.

Moog Subsequent 37

Moog Subsequent 37

Price: $1899

Another great synth from the experts at Moog, the Subsequent 37 is a thoughtful redesign of the powerful Sub 37 Tribute Edition that keeps all the same controls and features of the original while making a few key improvements.

Its new sound engine delivers richer low-end n thanks to reshaped gain-staging in the ladder filter, while the re-tuned Multidrive circuit offers a wider range and gets even dirtier than the original. Plus, with double the headroom in the mixer section, Duo mode sounds even better.

UDO Audio Super 6 Blue & Black

UDO Audio Super 6

Price: $2835

Available in black or blue finishes, both with a sleek retro-inspired aesthetic, the UDO Audio Super 6 is a versatile polyphonic synth with a unique hybrid design that uses both analog and digital synthesis techniques. With forward-thinking features like extensive modulation options, lush built-in effects, and a powerful sequencer, the Super 6 is the perfect blend of vintage charm and modern flexibility.

Sequential Prophet-6

Sequential Prophet-6

Price: $3499

The Sequential Prophet-6 is a modern tribute to the iconic Prophet-5, combining the original voltage-controlled oscillators, filters, and amplifiers with fresh new features like studio-quality effects, a polyphonic step sequencer, an arpeggiator, and more.

Teenage Engineering OP-1 Field 

Teenage Engineering OP-1 Field 

Price: $1999

An enhanced version of the popular OP-1 portable synthesizer, the OP-1 Field packs tons of new features into a redesigned low-profile aluminum body that's even more travel-friendly than before.

The new built-in speaker system delivers improved low-end and volume output thanks to a passive driver, while Bluetooth MIDI capabilities and USB-C connectivity make wireless jamming and quick charging a breeze.

Oberheim TEO-5

Oberheim TEO-5

Price: $1849

The Oberheim TEO-5 is a 5-voice polyphonic synthesizer that combines elements of the brand’s popular OB-X, Four Voice, and TVS designs. Equipped with genuine analog VCOs and VCFs, the TEO-5 delivers Oberheim’s signature sound in a compact, affordable package. Topped off with a premium full-sized Fatar keyboard featuring velocity sensitivity and aftertouch, the TEO-5 feels incredibly expressive to play. 

Moog Matriarch

Moog Matriarch

Price: $1899

Up next on our list is the Moog Matriarch, a patchable playground of semi-modular synths with four analog oscillators based on classic Minimoog circuits. Its built-in sequencer and arpeggiator let you craft intricate melodies, driving basslines, and evolving patterns with ease, while the onboard stereo ladder filters and analog delay add depth and dimension to sounds.

Sequential Prophet-10 Desktop 

 

Sequential Prophet-10 Desktop 

Price: $3399

Another great take on the classic Prophet-5, Sequential’s Prophet-10 Desktop doubles the voice count of the original to 10 for lush, detailed sounds. Each voice features two multi-waveform analog oscillators, resonant low-pass filters and amplifiers, and dedicated filter and amplifier envelopes, all driven by genuine Curtis VCOs and the Dave Rossum-designed SSI 2140 filter.

ASM Hydrasynth Deluxe  

ASM Hydrasynth Deluxe  

Price: $1999

The flagship of the Hydrasynth line, the Deluxe takes everything great about ASM's wave morphing synthesis and doubles down with a dual-engine setup. With a four-octave ribbon controller for bends, sweeps, and evolving textures, plus an expansive 73-note keybed with ASM's PolyTouch polyphonic aftertouch functionality, the Hydrasynth Deluxe offers unparalleled expressive control.

Erica Synths SYNTRX II 

Erica Synths SYNTRX II

Price: $2179

Inspired by the legendary EMS Synthi AKS, the Erica Synths SYNTRX II delivers everything from haunting drones to punchy basslines and glitched noisescapes. It features two stable oscillators with waveshapers, a versatile multimode filter, and external instrument inputs with an envelope follower for processing external gear.

Throw in versatile creative tools like a ring modulator, a recordable joystick, a built-in piano roll sequencer, and the brand’s signature matrix mixer, and it’s easy to see why SYNTRX II is one of the most popular synths in this price range.

Andy CatlinIf you’re interested in purchasing any of the synthesizers on this list, contact a Vintage King Audio Consultant via email or by phone at 866.644.0160.