The purest clean amp plugin
in the Cosmos

The Best All-Tube Clean Amplifier Plugin

We claim Virgo is THE best clean all-tube amplifier plugin on the market so far. Virgo’s heart is a pre/power amp section made up of 10 harmonics x 30 levels = 300 different FIR impulses (in High Definition mode). This represents a completely different solution from the usual IIR based plugins and the most accurate existing reproduction of the original amp, which naturally can be felt both during playbacks and “under your fingers” while playing in real-time. Incredibly, Virgo shows surprising and unexpected increased dynamics compared to the “real thing“!



Virgo is a plugin for Nebula 4 / Nebula 4 Player based on what has truly established itself as the “industry standard“ for combo/self-contained all-tube guitar amplifiers. The sampled model is a ’65 reissue of the version often referred to as “Blackface“, used on thousands of recordings and countless live performances, proven to be incredibly versatile not only for guitar but also bass, keyboards, vocals, accordion, electric violin and many other electrified instruments.

The main core of Virgo has been sampled with top class cables/gear to obtain the greatest path possible. Additionally, two pristine reverbs – a Room (default) and a Rich Plate – have been taken from a highly acclaimed digital hardware reverb unit. Finally, two different flavors of gorgeous vintage tremolo – mono and stereo – complete the chain to significantly multiply the tonal possibilities.

Three output modes are available. The power amp provides pristine clarity, great dynamics and a larger than life frequency response: this option sounds great by itself; however, if you want to use your own IRs, this is the starting point. The 57 and 201 options give you two great dynamic microphones, masterfully placed in front of the open-back cabinet to get the fullest tone possible. The sweet spot has been determined by injecting pink noise in the amp and by minimizing phase cancellations on the best sounding speaker of the combo.

Like in every our product, each band and preamp has been sampled without any converter / “calibration bias“ phase distortion. This allows to overlap the effect of more bands without adding unwanted coloration, reaching a new level of match with hardware for unparalleled results, even compared to hardware itself. This methodology is named SP Tech.


Audio Samples

We put great passion and dedication to get the perfect representation of the hardware. If you don’t trust our words, then trust your ears.



Pre/Power Amp
10 harmonics x 30 levels (300 FIR impulses in Hi Definition mode)
Output Modes
PWR (Power Amp 4x6L6s direct), 57 – dynamic microphone in ’73 preamp, 201 – dynamic microphone in ’73 preamp
Fast Attack, Infinite Ratio, Hard Knee, Stereo Linked
Room (default) – Rich (switch selectable)
Mono (default) – Stereo (switch selectable)
SP Tech