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The Nobsound TONE is a compact stereo amplifier with Bluetooth and AUX input, designed to power passive speakers from 4 to 8 Ω. Thanks to its TPA3116 chip, it delivers up to 2x 50 W at 4 Ω, while maintaining a distortion of 0.03% and a frequency response from 20 Hz to 20 kHz (±2.5 dB).
Intended for home Hi-Fi systems, desktop setups or compact audio configurations, it combines wireless streaming, analog input and volume control via a rotary encoder. Its binding posts for banana plugs and its aluminum alloy chassis make it easy to integrate into a fixed installation while keeping a small footprint.
The Nobsound TONE is a compact stereo Bluetooth amplifier featuring a TPA3116 chip, capable of delivering up to 50 W × 2 at 4 Ω. Its frequency response from 20 Hz to 20 kHz (±2.5 dB), its THD+N of 0.03% and its signal-to-noise ratio greater than or equal to 93 dB ensure stable reproduction with passive speakers from 4 to 8 Ω.


The TONE combines a Bluetooth input with an AUX input featuring a sensitivity of 0.775 V, allowing both wireless streaming from a smartphone, tablet or computer and the direct connection of an analog source. This dual connectivity makes it easy to integrate into a Hi-Fi installation, a desktop system or a compact home cinema setup.
Beyond its connectivity, the amplifier uses a rotary encoder with continuous rotation in both directions, replacing a traditional potentiometer to allow precise level adjustment.
The amplified signal is delivered to the speakers via banana binding posts, suited to a clean and quick installation. Its compact aluminum alloy chassis combines mechanical strength with a small footprint, allowing the TONE to easily find its place on a desk.

Technical specifications
| Specifications | |
|---|---|
| Product type | Integrated amplifier |
| Inputs | 1x Jack 3.5mm Bluetooth |
| Outputs | Speaker binding posts |
| Amplification chip | TPA3116 |
| Amplification type | Class D |
| Power | 2x50W @4Ω |
| THD+N | 0.03% |
| SNR | ≥93dB |
| Frequency response | 20Hz-20KHz (±2.5dB) |
| Input sensitivity | 0.775V |
| Compatible impedance | 4-8Ω |
| General | |
|---|---|
| Supply voltage | 12-24V DC |
| Dimensions | 78 x 70 x 32mm |
| Weight | 129g |
| Color | Black |
| Package | 1x Nobsound TONE 1x 19V power adapter |
| Input | Jack 3.5mm |
| Input | Bluetooth |
| Output | Speaker terminal |
| Color | Black |
| Channel | 2 (Stereo) |
| Class | Class D / T |
| Amplifier chip | TPA3116 |
| Power (W) | 50.0 |
| Remote Control | No |