The VHD+ Pre Module brings SSL’s legendary Variable Harmonic Drive (VHD) technology to the 500-series modular format, offering a preamp capable of everything from pristine, ultra-clean recordings to bold, harmonically rich distortion. Built on SSL’s SuperAnalogue™ design, it delivers the clarity and depth you expect from a professional studio preamp.

VHD+ allows precise control over harmonic content: at lower gain settings, it adds subtle valve-style warmth or a hint of transistor edge; increase the gain and the VHD circuit can produce gritty, aggressive transistor-style saturation. The module’s switchable VHD mode and blendable 2nd and 3rd order harmonics give complete creative flexibility, letting you dial in anything from smooth warmth to full-on, trashy distortion.

• SSL SuperAnalogue™ grade preamp
• Variable Harmonic Drive with 2nd and 3rd order harmonic control
• Switchable VHD in/out for clean or saturated tones
• Switchable low-frequency filter
• +48V phantom power for condenser microphones
• Phase invert, PAD, and Hi-Z instrument input options
• Ultra-clean recordings to extreme transistor distortion