Toggle Sound Toggle Sound

Sculpt instruments, enhance busses and fine-tune masters

ULTRAVIOLET Stereo Equaliser (UV EQ) takes the acclaimed minimum phase-shift Violet stereo EQ section from Fusion and puts it into 500-series format, whilst adding two fully parametric SSL mid-band EQ's featuring precision 'Focus' mode for the ultimate in 500 Series EQ flexibility and tonal control. UV EQ is the perfect partner for the SSL G-COMP Stereo Bus Compressor module, offering advanced SSL processing all from 500 Series modules. 


  • 4-band Stereo EQ
  • High and low shelving bands
  • Minimum-phase design inherited from Fusion
  • Dual fully parametric mid-bands
  • Precision 'Focus' mode 
  • High-Pass Filter at key fixed frequencies
  • Dedicated output Trim
  • Surgical precision to creative colour  

Beyond Violet is ULTRAVIOLET 

Over and above Fusion's Violet EQ, UV EQ takes features further, adding two dedicated mid-bands, with precision Focus mode. They're classic SSL parametric mid-bands capable of the traditional SSL processing techniques but also go far beyond, offering absolute surgical precision all the way to creative 'notch' style filtering and resonant screaming. 

Focus mode

Focus mode allows users to ‘hone in’ on problem frequencies or specific frequencies they want to accentuate or attenuate. Pressing the ‘Focus’ switch in, automatically narrows the chosen Q setting further and increases the range of gain available beyond the normal +/-9 dB operation, to a huge +/-18 dB. In true flexible SSL workflow fashion, it transforms this sweet sounding, musical SSL EQ into a more surgical tool.

HPF & Trim

Remove rumble and tighten up low frequencies, the HPF found on UV EQ brings a world of flexibility when processing low end. The interaction with LF shelving band offers unique ways to sculpt signals and yes, UV EQ is capable of the sought after boost + cut effect. Dedicated Trim control means you can hit convertors with plenty of headroom or smash into them the perfect amount when clipping is desired.



Hear UV EQ in action 

 Listen to the selection of high resolution (48kHz 24-bit PCM) audio files below and hear how UV EQ can enhance your productions. 

HPF 50 Hz
LF boost 70 Hz
HF boost 12 kHz
LMF Narrow Cut (FOCUS IN) at 600 Hz
HMF Wide Boost (FOCUS OUT) at 9 kHz


No UV EQ applied to audio


HPF 30 Hz
LF boost at 90 Hz
HF boost at 8 kHz
LMF Narrow Cut (FOCUS OUT) at 300 Hz
HMF Wide Boost (FOCUS OUT) at 2 kHz


No UV EQ applied to audio


HPF 30 Hz
LF boost at 70 Hz
HF boost at 12 kHz
LMF Wide Boost (FOCUS OUT) at 700 Hz
HMF Wide Boost (FOCUS OUT) at 7 kHz


No UV EQ applied to audio


The EQ curves

UV-EQ draws on the SSL legacy of careful selection of frequencies and response curves to create a musical and intuitive EQ designed to quickly dial in the sound of your mix. Take a look at the EQ graphs below and see how UV EQ offers everything from musical strokes and surgical precision to creative filtering and colouration.  

Tech spec

Module signal: Stereo

LF Shelf EQ: +/- 9dB Gain at 30, 50, 70, 90Hz

HF Shelf EQ: +/- 9dB Gain at 8k, 12k, 16k and 20kHz.

HMF Parametric EQ: +/- 9dB (focus mode 18dB) Gain 400Hz-9kHz

LMF Parametric EQ: +/- 9dB (focus mode 18dB) Gain 100Hz-1.1kHz

Switchable HPF: OFF, 30, 40, 50Hz

Gain Trim: +/- 12dB

Switched Bypass: Yes



ULTRAVIOLET Stereo Equaliser User Guide


SSL Studio Tools Brochure