Bubblesound HP40: Surgical High-Pass Precision

The HP40 is a specialized 4-pole high-pass VCF that brings the legendary punch of a transistor ladder circuit to the high-frequency spectrum. With a steep 24dB slope, it is the perfect tool for carving out space in a complex patch, allowing leads and percussion to cut through the mix. Beyond utility, the HP40 is a creative instrument; its resonance is tuned to be aggressive and liquid, capable of producing searing acid-style sweeps or acting as a stable sine-wave source when self-oscillating.

Key Features:

• 4-Pole Transistor Ladder: Classic analog circuitry optimized for high-pass response.

   

• Powerful Resonance: Adds harmonic excitement and "ping-able" percussive qualities.

• Mix Master: Essential for removing DC offset or low-frequency rumble from external audio.

• Full CV Control: High-resolution tracking for cutoff frequency modulation.

• Professional Black Aesthetic: Sleek, black-anodized faceplate with high-contrast labeling.

Technical Specifications:

• Width: 8HP.

• Depth: 25mm (Skiff friendly).

• Slope: 24dB/octave.

• Current Draw: +20mA (+12V), -20mA (-12V).