Feature: 1. Sound Preamp: Equipped with dedicated transformer isolation and differential balanced amplification, effectively resisting interference and isolating common ground interference. 2. NE5532 Dual Op Amp: Utilizes classic NE5532 dual op amp with 10x gain (20dB), high frequency electrolytic capacitor, noise reduction circuit design, delivering sound amplification with improved sound quality. 3. Signal Amplification: Converts weak signal power to line level signal with a 10x gain (20dB). Can directly drive headphones (headphone output cannot be used simultaneously with other outputs), supporting headphones with a maximum impedance of 16 ohms. 4. Wide Compatibility: Ideal for scenarios requiring common ground isolation. Inputs include DVD, CD, set top box, MP3, TV, phone, computer, tablet, microphone, turntable, sound card, guitar, bass, electronic instruments, game consoles, and more. Outputs to speakers, subwoofers, karaoke systems, mixers, AV receivers, power amplifiers, headphones, etc. 5. Compact and Portable: Small size for easy carrying and usage. Serves as a preamplifier and cannot drive passive speakers as a power amplifier. Specification: Item Type: Sound Preamplifier Material: Aluminum Alloy Chip: NE5532 Dual Op Amp Power Supply Voltage Range: DC 5V-16V Input Impedance: 600 Ohm Gain: 20dB Noise Level: -93.6 dB Dynamic Range: 90 dB Total Harmonic Distortion (THD): 0.00328% Channel Separation: -87.7 dB Size: Approx. 89 x 54 x 38mm / 3.5 x 2.13 x 1.5in . Package List: 1 x Preamplifier