Nobsound Tube Power Bluetooth Amplifier: HiFi Valve with Dual VU Meters USB U-Disk Playback RCA in for Bookshelf Speakers | 6P1 6N1 EI Transformer | Home Audio (DA7)

Parameters: Brand: Nobsound Model: DA7 Audio input: Bluetooth / Stereo RCA / USB Audio output: Banana speaker jacks / Stereo RCA Tube model: 6P1 × 4 + 6N1 × 3 Rated output power: 12W × 2 (4Ω); 8W × 2 (8Ω) Frequency response: 10Hz–40KHz (-3dB) THD: 1% (1KHz) SNR: 85dB Input sensitivity: 300mV Input impedance: 100KΩ Output impedance: 4Ω / 8Ω Power consumption: 150W Max storage of U-disk: 128G Supported file system of U-disk: FAT32 / ExFAT Supported formats of U-disk: MP3 / WMA / APE / FLAC / AAC / WAV Input voltage: AC 110V IN Dimensions (W*D*H): 318*305*155mm / 12.52*12.01*6.10in Package dimensions (W*D*H): 410*350*220mm / 16.14*13.78*8.66in Net weight: 7.6kg / 16.75lb Package weight: 8.5kg / 18.74lb Packing List: * 1 × DA7 Tube Amplifier * 1 × Power Cord * 1 × Bluetooth Antenna

• Tube Power Amplifier — Classic all-tube path with 4×6P1 power tubes + 3×6N1 drivers for warm, natural timbre and rich dynamics; rated 12W×2 @4Ω (8W×2 @8Ω). AC 110V input with US plug.
• Bluetooth — Dual-mode 5.3/5.0 wireless input pairs fast and stays stable for streaming from phones, tablets, or laptops; convenient front selector knob lets you switch sources instantly.
• USB Playback — USB-A (U-disk) input supports up to 128G, FAT32/ExFAT, and MP3/WMA/APE/FLAC/AAC/WAV so you can play local files directly without a separate player.
• Dual VU Meters — Two responsive analog meters visualize output swing in real time, adding classic studio aesthetics while helping you monitor levels at a glance.
• EI Output Transformer — Imported wideband EI transformers and gold-plated copper terminals deliver extended 10Hz–40kHz (-3dB) response, low distortion (1% @1kHz), and solid drive for 4/8Ω passive speakers.