The main appeal here is straightforward: you get genuine amplification power and Bluetooth wireless connectivity in a bare-bones board format. At this power level, this board can drive bookshelf speakers, floor-standing speakers, or passive subwoofers reliably. The TDA7498E is a well-established chip with a solid reputation for delivering clean audio with low total harmonic distortion.
But there's a catch—this is a component, not a finished product. You'll need to source a power supply, mount it in an enclosure, and handle the wiring yourself. That's not a dealbreaker if you know what you're getting into, but it's important to understand before purchasing.
Score breakdown
Pros
- TDA7498E amplifier IC is proven and reliable with low THD (total harmonic distortion), delivering clean, accurate audio reproduction across the frequency range
- Legitimate power output: 160W×2 stereo (at 4Ω) plus 220W subwoofer channel provides enough muscle to drive most passive speaker systems without strain
- Bluetooth 5.0 connectivity (typical) allows wireless audio streaming from phones, tablets, and computers without running cables across the room
- Compact board design fits easily into DIY enclosures, custom speaker systems, or retrofits without requiring large amounts of space
- Multiple input options including Bluetooth, 3.5mm AUX, and RCA connectors give flexibility for different audio sources
- Significantly more affordable than integrated amplifiers offering equivalent power, making it ideal for budget-conscious builders
Cons
- Bare board only—you must source a suitable power supply (typically 24-32V DC) and build or source an enclosure yourself; not a plug-and-play solution
- No built-in volume control, display, or physical buttons; you'll rely entirely on Bluetooth source control or require adding external potentiometers
- Documentation and customer support can be limited; technical guidance is sparse and English-language resources are minimal
Verdict
The Hosyond ZK-HT21 is a solid amplifier board for people who know what they're buying. The TDA7498E chip is genuinely capable, the power specs are real, and Bluetooth integration is convenient. If you're comfortable with electronics, this board represents genuine value—you're paying for amplification hardware, not branding or a fancy enclosure.
This isn't for someone looking for a ready-to-use system. It's for DIY builders, repair technicians, or anyone integrating audio into a larger custom project. If you fall into that category and understand the assembly requirements, this board delivers honest performance. Check the current price via the link below.
DIY audio builders, custom speaker designers, and technicians replacing amplifier modules in existing systems who are comfortable with component-level integration
Casual listeners looking for a plug-and-play amplifier solution or anyone uncomfortable working with electrical components and power supplies
Specifications
| hoofd | Elektronik |
|---|---|
| sub | Audio & Video |
| niche | HiFi & Soundbars |
| bron | amazon.de |
Frequently asked questions
The ZK-HT21 typically requires a 24-32V DC power supply capable of delivering at least 15-20A at full output. A quality linear or switched-mode PSU is recommended; undersized power supplies will cause the board to shut down or underperform under load.
Possibly, if the original enclosure had adequate space and similar power requirements. You'd need to verify the power supply voltage and current capacity, and ensure the board's footprint fits. Some modification may be necessary.
Volume is controlled via your Bluetooth source device (phone, tablet) or through an external potentiometer/volume control added to the RCA input line. The board itself has no on-board volume adjustment.
Any passive speakers rated for 4-8 ohms and 160W+ can work. Bookshelf speakers, floor-standing speakers, and powered subwoofers with passive inputs are all compatible. Verify impedance matching to avoid damage.
Where to buy?
We may earn a small commission through our links — your price stays the same.