Product details:

Brand: AOSHIKE Color: Black+BT 5.0 Features: ? This Bluetooth 5.0 Vacuum tube preamp,With Bass and treble,Sound quanlity really good,Let you enjoy sweet and warm sound quality.( Note:Cannot be used on a record player and phonographs) ? AUX / Bluetooth Audio input Manual switch mode, See the product description for more details,With DC12V/1A power supply(Do not use a power supply exceeding 12V) ? Upgraded using the GE5654 tubes design for easy replacement,Designed so the tube can be replaced, soft voice. - The tube can be replaced with 6J1/6J2/6K4/GE5654/6AK5/6Ж1n ? Build quality is surprisingly solid,Nice touch! The power circuit is completely separate from the audio circuit, Minimizing interference for clear sound ? This AIYIMA TUBE A3 PRO is a preamplifier. It is not an audio amplifier. It needs to be connected to an powered speaker and a rear amplifier Binding: Electronics model number: TUBE-A3 Pro Part Number: TUBE-A3 Pro Details: Parameters Power supply: DC12V 2A (With power supply) Audio input: Bluetooth/ AUX (connected to MP3, computer CD, DVD, mobile phone, etc. ) Audio output: RCA (connected to amplifier, active speaker) Frequency Response:20Hz-20k - Hz SNR:98d - B Control:Potentiometer knob and toggle switch Treble adjustment range:±6d - B Bass adjustment range:±10d - B Size (L*W*H): 137*104*41MM (without tube height) With treble and bass adjustment Color: Black with Bluetooth 5.0/ Silver with Bluetooth 5.0 1. Using original 6J1 Tube, Bluetooth 5.0 version 2. The main filter capacitor is imported from 1000UF/25V, and the coupling capacitor is imported with 1UF Philips capacitor. 3. The resistor uses a five-ring 1% metal resistor to ensure a good signal-to-noise ratio. 4. The PCB adopts 1.6mm thick double-sided sheet, 2.0 oz copper thickness, and the whole process of tin-spraying ensures the good passing performance of the current. First-class PCB quality. 5. The output is made of gold-plated RCA lotus seat, which is durable and beautiful! 6. The board layout is reasonable, beautiful, and the current is small. Attention : The product is a preamplifier. It is not audio amplifier. It needs to be connected to an active speaker and a rear amplifier. Package included: 1Pcs 6J1 Tube Preamplifier 1Pcs Power Supply EAN: 0749789527314 Package Dimensions: 10.2 x 8.5 x 2.5 inches