Pathos InPol Legacy Integrated Amplifier A fully balanced, 100 W class A, dual-monaural hybrid with 2 x ECC803s and a 6H30 input stage and dual InPol output stage. Made in Italy. The InPol Legacy Integrated Amplifier is this Italian hi-fi genius' flagship product, incorporating all of its best innovations and breakthroughs learned over its 25-year history. The heart of the InPoL Legacy is Pathos' patented dual InPoL technology, in bridged configuration, combined with a tube stage. It is named the Legacy because it represents the "ideal legacy" of Gaetano Zanini, co-founder, and owner of Pathos. With this amp, Pathos set itself the goal of making the best Pathos integrated amplifier ever, one that would match, if not surpass, the InPower and Adrenalin power amplifiers. Says Gaetano, "In designing the new InPoL Legacy, we, therefore, set no limits on ourselves – primarily concerning weight and size, which we have previously tried to limit." The result? A 308-lb, steamer-trunk-sized giant with a sound that is both big and soaring but also controlled and delicate. As Pathos says, "Even large excursions in intensity are sensitive to the smallest variations." The result is pure Pathos: a huge, dynamic sound that is also smooth and fatigue-free. What is InPol? When you listen to music, you’re not just hearing notes—you’re experiencing emotion. That’s the promise of Pathos’ revolutionary InPol technology: a design created to deliver all of that emotion. Traditional amplifier designs force a compromise between the warmth of tubes and the control of solid-state. InPol (short for Inseguitore Pompa Lineare, or Linear Pump Tracker) erases that compromise. It’s a patented, fully balanced, class-A topology where a single triode stage handles all voltage amplification—and maintains 100% of its sonic signature—while the InPol circuit delivers the current gain needed to drive even the most demanding speakers effortlessly. Features of InPol 1. Pure Class-A with No DistortionInPol doesn’t dilute or "correct" the tube signal with negative feedback or transistor interference. Instead, it uses a specially designed current amplifier that mirrors the exact character of the tube stage, with zero phase shift or tonal coloration. The result? The harmonic beauty and liquidity of tubes, with the authority and grip of solid state. 2. Emotionally Engaging SoundThere’s a reason Pathos fans describe InPol amps as “addictive.” Music flows with natural presence, dimensionality, and richness—an emotional connection that standard designs just can’t replicate. Voices are human, strings are alive, and the soundstage breathes. 3. Exclusive, Patented TechnologyOnly Pathos builds amplifiers like this. The InPol circuit is a patented innovation, handcrafted in Italy and unavailable from any other brand. This isn’t another copycat design—it’s a true original for those who want something extraordinary. 4. The Best of Both WorldsTube magic meets muscle. The warmth and finesse of tubes drive the musical expression, while the InPol stage delivers the speed, control, and punch that brings complex music to life. It’s a marriage of passion and precision. 5. Class-A with EfficiencyTraditional class-A amps waste enormous energy as heat. InPol’s design cleverly maximizes thermal and electrical efficiency, delivering the full benefits of class-A operation with far fewer compromises—proving you can have purity and performance in one stunning machine. The Legacy of Legacy InPoL Legacy is a fully balanced dual-mono amplifier. The power supply comes from Adrenalin and InPower, with one capacitive inductive filter per channel. The two toroidal power transformers are the largest Pathos has ever made, keeping in mind the brief to set no limits on this design. The power supply to the tube input stage is separate, with a toroidal transformer for each channel. The tubes are in a totem pull configuration, using two ECC803s TungSol tubes, and one 6H30 per channel. The 100-step passive volume is adjusted by low-noise precision resistors using insulated relay switches. Input and output connections are Neutrik and WBT. Given the weight, Pathos engineers have designed special packaging with wheels to make it easy to move and set up the amp. Specifications Power Output (8 Ohm, 4 Ohm): 100 W, 170 W Type: Fully balanced, pure class A, double Inpol technology Inputs: 3 x line RCA, 3 x line XLR Dimensions: 21.25" x 31.5" x 11.8" Weight: 309 lb (140 kg)
