400 Watt 2.1 Channel Car Audio Stereo Amplifier, 12V Class A/B HIFI Power Amp with RCA & AUX Input, Subwoofer Output, Cast Iron Build, 20Wx2+40W RMS, 4-8Ω Speaker Compatible, Model ST-838
400 Watt 2.1 Channel Car Audio Stereo Amplifier, 12V Class A/B HIFI Power Amp with RCA & AUX Input, Subwoofer Output, Cast Iron Build, 20Wx2+40W RMS, 4-8Ω Speaker Compatible, Model ST-838
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400 Watt 2.1 Channel Car Audio Stereo Amplifier, 12V Class A/B HIFI Power Amp with RCA & AUX Input, Subwoofer Output, Cast Iron Build, 20Wx2+40W RMS, 4-8Ω Speaker Compatible, Model ST-838
400W 2.1 Channel Class A/B HIFI Car Audio Stereo Amplifier — Pure Power, Pure Sound
Upgrade your car or home audio setup with the ST-838 400W 2.1 Channel HIFI Power Amplifier. Built with a durable cast iron body and engineered for Class A/B performance, this amplifier delivers clean, powerful audio across two speakers and a dedicated subwoofer channel. With 20W x 2 RMS + 40W subwoofer output, a wide frequency response of 20Hz–20KHz, and ultra-low 0.4% distortion, the ST-838 is designed for audiophiles who demand precision. Compatible with 4–8Ω speakers and powered by DC 12V, it's equally at home in your vehicle or on your desktop.
Why You'll Love It
- 🔊 Class A/B HIFI Performance — 20W x 2 + 40W subwoofer RMS power (200W + 200W max) for rich, full-range audio
- 🎵 2.1 Channel Output — Connect 2 stereo speakers + 1 subwoofer simultaneously for immersive sound
- 🔌 Versatile Input Options — Stereo L/R RCA and 3.5mm AUX input for easy connection to any audio source
- 🛡️ Cast Iron Build — Rugged, heat-dissipating construction for long-lasting durability
- 📊 High Fidelity Specs — 20Hz–20KHz frequency response, 0.4% THD, 80dB SNR, 47K resolution
- ⚡ DC 12V Powered — Ideal for car audio systems and 12V desktop setups
- 🔉 4–8Ω Speaker Compatible — Works with a wide range of aftermarket car and home speakers
Specifications
| Spec | Details |
|---|---|
| Model | ST-838 |
| Material | Cast Iron |
| Type | 2.1 Channel Class A/B HIFI Power Amplifier |
| Input Voltage | DC 12V / 2A |
| RMS Power | 20W x 2 + 40W (Subwoofer) |
| Max Power | 200W + 200W |
| Audio Input | Stereo L/R RCA / 3.5mm AUX |
| Audio Output | Cable Speaker Jacks + Subwoofer |
| Speaker Impedance | 4–8Ω |
| Frequency Response | 20Hz – 20KHz |
| Distortion (THD) | 0.4% |
| SNR | 80dB |
| Resolution | 47K |
| Bluetooth | Not Supported |
| Package | 1x Power Amplifier, 1x User Manual |
Frequently Asked Questions
Q: Who is this amplifier best suited for?
A: The ST-838 is ideal for car audio enthusiasts, audiophiles, and DIY home theater builders who want a compact, high-fidelity 2.1 channel amplifier at an accessible price point.
Q: Can I use this amplifier at home, not just in a car?
A: Yes! As long as you have a 12V DC power supply (sold separately), this amplifier works perfectly as a desktop or home audio amp for bookshelf speakers and a subwoofer.
Q: Is this a good gift for an audiophile or car enthusiast?
A: Absolutely. Its HIFI Class A/B performance, cast iron build, and 2.1 channel capability make it a standout gift for anyone serious about audio quality — great for birthdays, Father's Day, or Christmas.
Q: How do I connect my audio source to this amplifier?
A: Connect your head unit or audio device using the stereo L/R RCA inputs or the 3.5mm AUX input. Then connect your speakers via the cable speaker jacks and your subwoofer to the dedicated subwoofer output.
Q: What speakers are compatible with this amplifier?
A: Any 4–8Ω impedance speakers are compatible. This covers the vast majority of aftermarket car speakers and many home bookshelf speakers.
Q: Is this amplifier good for learning about audio electronics or STEM?
A: Yes! The ST-838 is a great hands-on introduction to audio amplification, Class A/B circuit design, and speaker impedance matching — making it an excellent educational tool for electronics hobbyists and STEM learners.
Fast US Shipping
Ships from US warehouse, free delivery 2-7 business days.
