Integrating Vintage Charm with Modern Precision The GR70 is a two-in-one headphone amp and preamp. Easily integrate this tube preamp into your home audio system with its multiple headphone jacks and RCA input/output options. Input: RCA; Output: RCA, 6.35mm/3.5mm Headphone Output; Max Power Output: 300mW@32Ω; Power Input: DC 12V/3A; Headphone Impedance: Low Mode: 16Ω-120Ω, High Mode: 120Ω-300Ω;
