A9 HiFi Tube Preamp HiFi Headphone Amplifier Bluetooth 5.0 Receiver Support U Disk Playing Advantages: - Bluetooth 5.0 - Support U disk input - RCA audio - Multiple inputs - HiFi tube preamp headphone amplifier Description: A9 is an amp Bluetooth receiver. The HiFi tube preamp integrated with the lossless music player can effectively filter noise and improve the sound quality. The sound is soft and transparent with texture, making the sound quality more flexible. Adopting high-performance and low-noise dual op amp NE552, which makes the sound warm and high fidelity. Two high-end 6K4 bile ducts can effectively remove the digital taste and restore high-fidelity music!A9's U disk mode can play mainstream lossless music formats such as APE, FLAC, and the sound quality reaches HiFi CD level. Lossless sound quality output, which is connected to various audio equipment such as digital amplifiers, multimedia speakers, etc. All-aluminum shell, with gold-plated RCA interface, exquisite appearance, classic luxury. Features: - High fidelity tube preamp HiFi headphone amplifier - Support U disk input, support APE, FLAC, WAV and other lossless playing - Can be used as a high-fidelity lossless music player - Rich audio input interface, freely switch audio inputs - Adjust treble and bass at you will Rear Panel Introduction: - USB: For U disk input - Input: Audio input (Connect to PC, cellphone, CD, players and the like) - ANT: Bluetooth signal input - Audio output: Connect to power amp or active speakers - POWER: Switch Specifications: - Product model: A9 - Working voltage: DC 12V - Frequency response range: 20Hz-20KHz (±3dB) - Audio input: Bluetooth 5.0/RCA/U disk (U disk is not included) - Audio output: RCA/3.5mm headphone jack - Signal to noise ratio: 110dB (when RCA input) - Distortion: 0.05% - U Disk: 32GB - U Disk: MP3/WMA/APE/FLAC/WAV, etc. Headphone impedance: 16-64 - Maximum output power of earphone: 100mW (32 load) - Input sensitivity: 0.775V - RCA output level: 1.4Vrms - Treble, mid-tone, bass gain: ±6dB - Product size: 13143 CM - Machine weight: 0.42kg Package Included: - 1 x Set of Tube Preamp Note: - U disk is not included. Previous and next buttons are effective only when there is U disk input. Usually it cost about 35USD-50USD. If you receive defective item, please kindly notify us within 14 days. The item "A9 HiFi Tube Preamp HiFi Headphone Amplifier Bluetooth 5.0 Receiver for U Disk" is in sale since Wednesday, October 28, 2020. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps". The seller is "cybereveryday" and is located in Shenzhen. This item can be shipped worldwide.