Nobsound Hi-Fi Vacuum Tube Amplifier: Bluetooth 5.0 Receiver with DAC, Optical/USB Input, Subwoofer Output & VU Meter for Home Audio System (A3)

Warm Tips 6.35mm headphone output with priority, please make sure the headphone has been disconnected if you want the speaker and low-frequency output. Please note the USB input does not support macOS. Parameters Audio input: Bluetooth 5.0 / Coaxial / Optical / USB(PC-USB/U-disk) / 2 groups of RCA Audio output: Speaker Jacks / 6.5mm Headphone Jack / Low-frequency output(connect to active subwoofer) Optical/Coaxial sampling rate: 16Bit/48KHz USB sampling rate: 32bit/192kHz U-disk support format: MP3/WAV/FLAC/APE/WMA USB support max capacity: 128G Tubes: 13P1P×2+6P16A×2 Headphone impedance range: 16-300Ω Output power: 35W+35W Output impedance: 4-8Ω Frequency response: 20Hz-20KHz ±2dB SNR: ≥80dB THD: ≤0.5% Dimensions(W*D*H): 163*253*175mm / 6.42*9.96*6.89in Package dimensions(W*D*H*): 350*220*240mm/13.78*8.66*9.45in Net weight: 3.5kg/7.72lb Package weight: 4.5kg/9.92lb Packing List 1*Amplifier 1*Power Cord 1*Remote Control(without battery)

• High-Fidelity Tube Soundstage: Experience authentic vacuum tube warmth with detailed acoustic reproduction. Dual 6J1 tubes and premium op-amp chips deliver expansive soundstage depth, bringing vinyl warmth and digital clarity to life for audiophiles.
• All-in-One Input Hub (USB/Optical/RCA): Connect any audio source effortlessly via 24-bit/192kHz USB, Optical, Coaxial, and dual RCA inputs. Native decoding for PCM/FLAC/DSD files ensures studio-grade signal purity from turntables, TVs, or streaming devices.
• Bluetooth 5.0 + Dedicated DAC: Stream lossless audio with Qualcomm QCC3031 chipset & APTX-HD support. 33ft low-latency transmission paired with CS8416+ES9023 DAC chip eliminates signal compression for CD-like wireless quality.
• Active Subwoofer Integration: Enhance bass response via dedicated sub-out port. Adjustable crossover seamlessly blends low frequencies with main channels for theater-level impact - ideal for orchestras or EDM.
• Analog VU Meter & Direct Headphone Out: Monitor signal dynamics via illuminated dual VU meters. 6.35mm headphone jack with pure Class A circuit provides zero-impulse listening sessions without speaker interruption.