Increase VHD input gain and the Variable Harmonic Drive process introduces either 2nd or 3rd harmonic distortion or a blend of the two to your source material. At lower gain settings it adds gentle valve-style warmth or a touch of transistor edge. As the gain is increased the more extreme the distortion becomes, until at high gain settings it delivers fierce trashy transistoresque grunge.

The VHD+ Pre module gives the user ultimate versatility from a studio grade preamp. Whether it's ultra-clean traditional SSL, subtle warming or totally trashy transistor distortion, VHD will change your expectations of what a preamplifier should deliver.

Key features

• SSL SuperAnalogue^TM grade preamp
• 2nd order harmonics (valve warmth to extreme distortion)
• 3rd order harmonics (transistor edge to totally trashed)
• Absolute control via 2nd and 3rd order harmonic blend
• Variable Harmonic Drive (VHD) in/out switch
• Switch-able LF Filter
• +48V phantom power
• Phase invert switch
• PAD switch
• Hi-Z switch