Fosi Audio HD-A1 Hi-Fi Home Class AB Power Amplifier
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Fosi Audio HD-A1 Hi-Fi Home Class AB Power Amplifier
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
We offer free worldwide shipping, except for certain regions such as Ukraine and Russia, where our services are currently unavailable.
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Customer Support
WhatsApp: +8613716612254
support@fosiaudio.com
Mon-Fri: 3:00 AM - 3:00 PM PST -
FAQ’s
If you have any questions, please refer here: FAQs
80W Toroidal Transformer
Custom pure copper toroidal transformer with up to 100W peak output ensures stable power delivery, even with three devices connected.
Nippon Chemi-Con Capacitors
Premium capacitors help minimize ripple and noise, with ripple as low as 0.1mV.
High-Reliability Rectifier
A GBU806 rectifier bridge rated at 600V/8A ensures fast, stable AC-to-DC power conversion.
4-Core Regulation
Powered by three LM1085IT and one ST78M05 linear regulators from Texas Instruments.
Product details
Description
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RMS 50watts x 2(8 ohms, 20 Hz - 20 kHz, 0.02% THD) for 2-16ohm speakers.
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Similar to the HDAM circuit, adopts TOSHIBA 2SA1943 *2 and 2SC5200 as amplifier output chip to get HI-FI sound quality; Home HiFi amplifier, Sturdy, Aluminum enclosed amp makes it perfect for projects and DIY audio applications.
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Tube Sound Quality: The JFET FET with the characteristics of electron tube is used as the single differential input and the output adopts the Large Current Darlington structure, which not only has a warm voice but also has powerful output; Exclusively designed for the customers who pursue HiFi sound.
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110V Powerful Power Supply: A-core non-breaking point oxygen-free copper ring transformer to get stable and powerful power input; We also have the AC220V Version. Japan Omron relay protection circuit; NOVER gold-mounted audio capacitors; Japan ALPS Potentiometer; All-aluminum chassis;
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Manufacturer-Direct, free lifetime technical support, and 18-month manufacturer's warranty.
Specifications
| Specifications | Details |
|---|---|
| Model | HD-A1 |
| Output Power | 50W x 2 |
| Terminating Impedance | 2Ω-16Ω |
| Input Mode | RCA |
| Output Mode | Speakers Output |
| Frequency Range | 20Hz - 20kHz (±1 dB) |
| THD | ≤ 0.002% |
| Input Sensitivity | ≤ 280mV |
| Power input | AC 100-120V/AC 220-240V |
What‘s in the box？
| Item | Quantity |
|---|---|
| Fosi Audio HD-A1 Amplifier | x 1 |
| AC power cord | x 1 |
| User’s Manual | x 1 |
Video
Specifications
Power Input
AC: 115V / 230V
Note:
115V setting supports 100–120V input
230V setting supports 220–240V input
Power Output
DC 1: 12V / 15V (Rated Power: 20W)
DC 2: 12V / 5V (Rated Power: 15W)
USB: 5V / 1A (Rated Power: 5W)
Operating Temperature
-20 ~ 40°C (-4°F ~ 104°F)
Temperature Rise Test
Temperature rise of 25°C (77°F) at full load
What‘s in the box？
- Fosi Audio PSU20*1
- 1.2m (47.2 in) DC-DC Power Cable*1
- 0.3m (11.8 in) DC-DC Power Cable*1
- User Manual*1
- AC Power Cord*1