- Multiple inputs and outputs: support Bluetooth / Coaxial / Optical / USB(PC-USB/U-disk) / 2 groups of Stereo RCA inputs, compatible with phone, computer, TV, CD player, MP3, etc., can greatly improve the sound quality for them. U-disk input supports lossless formats such as APE, FLAC, WAV etc.. Besides the speaker output, the 6.5mm headphone jack can easily drive 16-600Ω headphones, easy to enjoy HiFi music.
- Sufficient drive power and subwoofer output: Rated 35W+35W output, easily drives most home passive speakers, and reproduces the details of the sound well. Specially designed with a low-frequency output to connect an active subwoofer to build a 2.1-channel audio system, providing high-quality music for audiophiles.
- Tube design and Hi-Fi sound: adopt 2PCS 6K3P tubes and 2PCS 6P17A for amplification, sounds delicate and smooth, clear and mellow, with warm and vintage light, can decorate your desktop and let your ears drunk in music.
- Unique appearance: adopt an aluminum alloy body that can suppress mechanical vibration and prevent electromagnetic interference. Independent indicator light, reflects working status in real-time. A retro and sensitive VU meter, auditory and visual double enjoyment, also with user-friendly remote control; with AC 110/220V switcher, very suitable for home desktop system use.
- 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: 16Bit/48KHz
- U-disk support format: MP3/WAV/FLAC/APE/WMA
- USB support max capacity: 128G
- Tubes: 6K3P×2+6P17A×2
- Headphone impedance range: 16-600Ω
- Headphone output power: 15mW @32Ω
- Output power: 35W+35W @4Ω 25W+25W @8Ω
- Output impedance: 4-16Ω
- Frequency response: 20Hz-20KHz
- Power consumption: 100W
- Input sensitivity: 600mV
- SNR: ≥84dB
- THD: 0.10%
- Separation: ≥75dB
- 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
- Amplifier ×1
- Power Cord ×1
- Remote Control(without battery) ×1

Nobsound A3 Bluetooth Tube Amp Optical DAC
Experience rich, high-fidelity sound with Nobsound A3. It features Bluetooth 5.0, versatile inputs and remote control for a dynamic and wireless audio experience. Connect headphones or a subwoofer for personalized or immersive sound. Stylish, durable and perfect for any audio enthusiast.

VU Meter Design
Modern look with quality build for long-lasting use.

Hi-Fi Tube Sound
Rich, detailed audio from vacuum tubes for an immersive listening experience.

Multiple Inputs
USB, Coaxial, Optical, and 3.5mm jack for versatile connectivity.

Headphone Jack
Headphone Jack

Bluetooth 5.0
Seamless wireless streaming with extended range.

Subwoofer Support
Enhanced bass through subwoofer output.

All-Round Solution
Ideal for various audio setups, from home theaters to Hi-Fi systems.

Remote Control
Easy operation from a distance for convenience.