ST-839 2.1 Ch Bluetooth Hi-Fi Amplifier 25W×2+40W Home Car
ST-839 2.1 Ch Bluetooth Hi-Fi Amplifier 25W×2+40W Home Car
ST-839 2.1 Channel Bluetooth Stereo Hi-Fi Power Amplifier — Big Sound, Versatile Use
Elevate your listening experience with the ST-839 Hi-Fi Audio Power Amplifier. Delivering 25W × 2 (stereo) + 40W (subwoofer) across a true 2.1-channel configuration, this aluminum-alloy amplifier drives most passive speakers and subwoofers with clarity and depth — whether in your living room, car, boat, RV, or workshop. Made in Mainland China.
Key Features
- Powerful 2.1-Channel Output: 25W left + 25W right + 40W dedicated subwoofer channel fills any space with rich, full-range sound.
- Bluetooth Wireless Streaming: Connect your smartphone, tablet, or laptop wirelessly for cable-free convenience.
- Independent Bass & Treble Controls: Dedicated subwoofer, bass, and treble knobs let you sculpt your ideal sound signature and keep distortion as low as 0.1%.
- Universal Input Compatibility: RCA and AUX inputs work seamlessly with phones, MP3/MP4 players, CD players, TVs, computers, and more.
- Wide Frequency Response: 20 Hz–20 kHz rated frequency covers the full spectrum of human hearing for accurate music reproduction.
- Multi-Venue Versatility: DC 12V operation makes it ideal for home theater setups, cars, boats, RVs, and golf carts.
- Durable Aluminum Alloy Body: Lightweight yet rugged construction with effective heat dissipation for long-lasting performance.
- Includes Remote Control: Adjust volume and settings from across the room without leaving your seat.
Technical Specifications
| Amplifier Type | Hi-Fi Stereo Amplifier |
| Channels | 2.1 (Left + Right + Subwoofer) |
| Rated Power | 25W × 2 + 40W |
| Rated Voltage | DC 12V |
| Frequency Response | 20 Hz – 20 kHz |
| Resolution | 47 kHz |
| Distortion (THD) | ≤ 0.1% |
| S/N Ratio | 75 dB |
| Impedance | 4–8 Ω |
| Material | Aluminum Alloy |
| Color | Black |
| Origin | Mainland China |
What's in the Box
- 1 × ST-839 Audio Power Amplifier
- 1 × Remote Control
- 1 × DC 12V Power Adapter
- 1 × User Guide
Notes
Due to manual measurements, please allow a 1–3 cm (0.4–1.18 in) dimensional tolerance. Colors may vary slightly due to monitor settings and lighting conditions.
For further guidance on audio equipment safety and best practices, visit the U.S. Consumer Product Safety Commission (CPSC).
Frequently Asked Questions
Q: What speaker impedance does the ST-839 2.1 channel amplifier support?
A: The ST-839 stereo amplifier supports passive speakers and subwoofers with an impedance of 4–8 ohms, making it compatible with the vast majority of home, car, and marine speaker systems.
Q: Can I use the ST-839 amplifier in my car or RV?
A: Yes! The amplifier operates on DC 12V, making it perfectly suited for use in cars, boats, RVs, and golf carts, in addition to standard home use with the included power adapter.
Q: Does the ST-839 amplifier include Bluetooth connectivity?
A: Yes. The ST-839 features built-in Bluetooth for wireless audio streaming from smartphones, tablets, and other Bluetooth-enabled devices, alongside RCA and AUX wired inputs for maximum flexibility.
Q: What controls are available on the ST-839 Hi-Fi amplifier?
A: The amplifier features individual master volume, bass, treble, and subwoofer knobs, plus a dedicated remote control, giving you precise, hands-on command over your audio output.