The BOSS PH-2 Super Phaser is a classic all-analog multi-stage phaser produced from 1984 to 2001, highly regarded for its deep, swirling, electronic phase modulations that cut cleanly through high-gain distortion circuits.Circuit & Performance Architecture

• Topology: All-analog circuit path using 12 stages of shifting for highly complex, pronounced notch filtration.
• Bypass Behavior: Buffered bypass switching typical of vintage BOSS architecture.

Control Layout & Functions

• RATE: Adjusts the speed of the phase modulation cycle.
• DEPTH: Controls the intensity and amplitude sweep width of the phaser effect.
• RES (Resonance): Regulates the amount of feedback signal sent back through the phase stages, shifting the tone from a smooth wash to a sharper, synthesizer-like resonance.
• MODE (I / II): Toggles between two distinct circuit configurations:
• • Mode I (4-Stage Filter): Provides a standard, warm, and smooth phasing tone that mimics traditional vintage phase circuits.
  • Mode II (12-Stage Filter): Engages all 12 stages to construct a deep, dramatic, and radically sweeping modulation texture.

Technical Specifications

• Power Requirements: Vintage BOSS ACA specification (as indicated by the sticker in the second photo).
• • Important Power Note: It requires 12V DC when powered by an external adapter alone to compensate for an internal dropping resistor. However, it operates on standard 9V DC if powered by an internal 9V battery or daisy-chained on a shared power supply with other standard 9V pedals.
• Current Draw: 20 mA.
• Input Impedance: 1 MΩ.
• Output Impedance: 10 kΩ or greater.
• Manufacturing Location: Engineered by BOSS Corporation (Roland) and manufactured in Taiwan (as shown on the black base plate label in the fourth photo).