PFMOD ™ options
Harrison Laboratories' PFMOD line (Passive Frequency MODules) provides inline, line-level passive crossovers designed to manage audio frequencies between a source unit and an amplifier without requiring an external power source . These modules use RCA connections and are marketed as "active crossover simulators" because they offer the frequency control typically found in active units while remaining noise-free and transparent to the signal .
🇺🇸 MADE IN THE USA 🇺🇸
