SPL’s TwinTube is one of those magical devices that make subtle changes which result in a huge improvement in your tracks.

Simply adding a bit of TwinTube’s analog tube warmth can dramatically improve vocal and instrument tracks. Many times you will need less EQ-ing after applying TwinTube to brighten or fatten things up.

TwinTube also increases perceived loudness without changing actual gain, making it an incredibly useful tool to have in your signal-processing arsenal.

All the character, tone, and utility of the hardware version is available as an Analog Code plugin. As with all of SPL’s Analog Code plugins, the TwinTube is an exacting software model of the original analog hardware processor.

TwinTube combines two essential tube effects in a single processor: saturation and harmonics processing. Both stages process the signal separately, so you can apply them individually or combine them.

Harmonics processing can be applied to four different fundamental frequency bands to improve presence and clarity with minimal affect on signal levels. The saturation control behaves similarly to tape saturation, adding warmth and density, regardless of sound source.


  • Precisely modeled plugin version of SPL’s analog tube effect processor
  • Tube and tape saturation effects
  • Increase perceived gain without increasing level
  • Subtle coloring to dramatic distortion with a simple knob tweak.
  • Works magic on a wide variety of signals including vocals, acoustic guitars, drums, brass, and more

Audio Examples

Industry Reviews

  • Soundprank/Colin E. Fisher

    Soundprank/Colin E. Fisher

    Anjunabeats, Armada, Enhanced Music

    This plugin delivers vacuum tube saturation for days, from subtle warmth to dirty grunge, it sounds fantastic on digitally harsh sounds, and absolutely KILLS on vocals and brassy… Read More

  • Ethan Mates

    Ethan Mates

    Engineer (Linkin Park, Red Hot Chili Peppers, J-Lo, Tupac, Tom Petty)

    Saturation is one of the most important keys to mixing in the box, particularly heavier music, and this plug delivers tons of tube vibe and thickness for days!

  • Thomas Gold

    Thomas Gold

    Producer/DJ (Armada, Axtone, Protocol, Revealed)

    One of my "go to" tools for warming up a sound. I just throw it onto a channel and I can instantly get a warmer, thicker sound. I can easily dial in more harmonics and saturation to taste. Simple… Read More

  • James Wiltshire

    James Wiltshire

    Producer (Freemasons, F9 Audio)

    Anyone working with digitally sourced material needs this in their production life. It just spits out vibe.

  • Stonebridge



    Tired backing vocal and poorly recorded guitar saver. Amazing results and super easy to work with!

Customer Reviews

  • Just Add Tone

    by Tyler Taylor
    TwinTube is a great harmonic plugin that simplifies saturation. I would recommend this plugin if you're looking for reliable saturation that provides a "round" warmth without much fuss.
  • TwinTube

    by JH Studio
    This is my favorite saturator for Synth and many other Instruments. Very flexible and effective.
  • Energy Booster.

    by Stereotactic
    I always wanted a plugin that injects energy and life back into my drums after compression and I finally found it.
  • Just that little bit extra you needed

    by Alex
    This is a fantastic plugin. Simple and easy to use. But very powerful. Use it to excite boring guitars. Throw it on your shells or drum buss to help smooth out those peaky transients. Or on limp… Read More
  • Perfect for dusty old school drum breaks!

    by PeteMarriott
    For all my Boom Bap and Lo-Fi Hip Hop heads: This plugin right here is what you should have in your sampling chain when you're snatching those break beats! Don't sleep! Wake the funk up and cop this… Read More


Supported Plugin Formats
AAX DSP, AAX Native, AU, AAX AudioSuite, VST2, VST3

Supported Operating Systems
MacOS 10.9 through 10.14
Windows 7 through 10

Intel CPU only (minimum 2 GHz recommended)

Intel-compatible CPU with SSE2 instruction set (Pentium 4 compatible or higher; minimum 2 GHz recommended)

System Requirements
Display resolution: 1440 × 900px or 1280 × 960px or higher
Memory: 2 GB RAM