Bluetooth Audio Amplifier Boards – ZK-HT21, ZK-TB21, ZK-MT21 & ZK-502MT

R 339.99 ZAR

Build or upgrade your DIY speaker system with a Bluetooth audio amplifier board. Choose the model that matches your speakers, power supply and channel requirements.

Choose your model

ZK-HT21: 2.1-channel board with TDA7498E chip, Bluetooth 5.0, AUX and USB inputs. DC 15–36V supply, with 12V supported. Listed maximum output: up to 160W per left/right channel and 220W for the subwoofer. Dimensions: 145 × 126 × 28mm.
ZK-TB21: 2.1-channel board with TPA3116D2 chip, Bluetooth 5.0 and AUX input. DC 12–24V, 5A or higher supply. Listed maximum output: up to 50W per left/right channel and 100W for the subwoofer. Dimensions: 118 × 100 × 22mm.
ZK-MT21: 2.1-channel board with Bluetooth 5.0 and AUX input. DC 12–24V, 5A or higher supply. Listed output: below 50W per left/right channel and below 100W for the subwoofer. Dimensions: 93 × 90 × 22mm. Do not connect a 24V battery pack.
ZK-502MT: 2.0-channel stereo board with Bluetooth 5.0 and AUX input. DC 9–24V, 3A or higher supply. Listed maximum output: 50W × 2. Dimensions: 89 × 60 × 21mm.

Speaker matching

ZK-HT21 supports listed speaker ratings of 30–200W at 4–8Ω. ZK-TB21 and ZK-MT21 support 20–100W speakers at 4–8Ω. ZK-502MT supports 15–100W speakers at 4–8Ω. For 2.1-channel models, use a dedicated subwoofer on the subwoofer output.

Power and installation

Output depends on the selected model, supply voltage and current, speaker impedance and audio input. Maximum ratings are not guaranteed continuous output. Use a stable, low-ripple DC supply rated above the amplifier's actual power demand and within the selected model's voltage range. Check your selected variant before connecting power or speakers.

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