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Korg Volca Nubass Vacuum Tube Bass Synthesizer

A powerful bass synth with a sound source based around a vacuum tube oscillator



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Product Description

Key features

  • Powered by Korg’s unique Nutube technology for fat, warm sound
  • Transistor ladder low-pass filter for classic old-school subtractive synth tones
  • Analog driver circuit for thick, saturated distortion
  • 16-step sequencer with transpose, accent, slide and randomise functions
  • Included software bundle, including Izotope’s Ozone Elements and Propellerhead’s Reason Lite

Even today, when digital technology allows electronic musical instruments to simulate any sound imaginable, people seek the warm harmonics and distortion produced by analog vacuum tubes. This distinctive sound has a quality beyond words that sets it apart, and cannot be captured by a response curve; it's the unmistakable sound of tubes.

The volca nubass is the first analog synth to be equipped with a Nutube new-generation vacuum tube in its oscillator. Vacuum tube plus analog means that the sound is warm, thick, and rich. The familiar transistor ladder filter gives it the character of a classic bass machine, along with overdrive, and huge-sounding distortion.

Powered by the Korg Nutube

A vacuum tube oscillator circuit forms the heart of volca nubass, utilizing ground-breaking Nutube technology. The Nutube is equipped with two vacuum tubes; one is used in the oscillator to generate a sawtooth wave or square wave.

The other vacuum tube is used in the drive circuit of the sub oscillator, adding depth and warmth one octave below the oscillator. This oscillator and sub oscillator provide a circuit structure that brings out the harmonic character that only a real vacuum tube could provide.

Transistor ladder low-pass filter

The low-pass filter defines the sound of this bass machine; it uses a transistor ladder design found on classic analog bass synths. This filter is uniquely dynamic in the way it affects a sound more than just ranging from bright-to-dark. Its wide range of timbral possibilities makes it ideal for a broad variety of dance music.

Analog driver circuit

Nubass is equipped with overdrive that uses an analog circuit reminiscent of a classic stompbox. Turning the knob toward the right compresses the volume while causing mild distortion, adding thickness to your bass sounds. The tone knob also lets you adjust the crispness of the high-frequency range.

Sam Beattie author picture

Written by Sam Beattie

Built-in Effects
Number of Keys
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Key Action

Customer Reviews


3 reviews





Neil Armitage28th Dec 2020

I bought this for my son for Christmas after he showed an interest in my Behringer Model D. As we are new to this we were struggling a bit with the model D so I thought the Korg would be an easier way for him to make progress as he likes the Rhythm loop. It worked out really well - he loves it - quick and easy way to gain some confidence and make some tunes. He is already talking about saving up for one of the other volca components.

Value 5Looks 4Durability 4Sound 4

Trusted Customer15th Dec 2020

Another great volca for bass sounds.

Value 4Looks 5Durability 4Sound 5

Trusted Customer14th Oct 2019

a new sound for your arsenal.

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Andertons Music Company's Registered Office: 58-59 Woodbridge Road, Guildford, GU1 4RF. Andertons Music Company acts as a credit broker and not a lender and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority. Andertons Music Company is authorised and regulated by the Financial Conduct Authority, firm registration number 716155. Credit provided subject to age and status.