Feature: 1. High-performance Tube Headphone Amplifier: The TA-26S, features 6N8P electronic tubes for front-stage amplification and 6N5P tubes for power amplification, bringing great sound quality 2. AUX Input: Connect your decoding headphone amplifier, pure decoding device, or player to the TA-26S using the dual input interface, allowing you to enjoy audio from various devices 3. Amplify Your Speakers: The AUX OUT dual interface allows you to use the TA-26S as a preamplifier for power amplifiers and speakers, enhancing your overall audio experience 4. Wide Compatibility: Equipped with 4.4mm and 6.35mm headphone interfaces (3.5mm to 6.35mm adapter included), making it compatible with headphones ranging from 60?? to 600?? impedance 5. Exceptional Performance: Adopts the E-type transformer with low noise and low magnetic leakage, which not only exerts its maximum performance but also greatly reduces the weight of the machine, suitable for home use Specification: Maximum Output Power: 500mW (600/300?? load) Frequency Response: 10Hz~30KHz (??0.5dB) Gain: +16dB Distortion Degree: 0.09% (1KHz) SNR: 110dB Applicable Headphone Impedance: 60??~600?? Item Size: Approx. 253*116*165mm/9.96*4.56*6.49in Item Weight: Approx. 3.9kg/8.6lb Package Size: Approx. 32.8*27.3*21cm/12.91*10.74*8.26in Package Weight: Approx. 4.85kg/10.69lb. Package List: 1 * Tube Amplifier 1 * Power Cable 1 * 3.5mm to 6.35mm Adapter 1 * User Manual