Product Name: DC 15-36V Stereo Audio Receiver Power Amplifier Module
Channel: 2.1(R & L+ Subwoofer)
Speaker Impedance: 4 - 8Ω
Audio Input: bluetooths / AUX / Flash Drives
Output Power: 160 + 160 + 220W
Working Voltage: DC 15 - 36 V (Under voltage protection below 9V, and 12V power supply can also be supported)
Speaker Power: 30 - 200W
Model: ZK-HT21
bluetooths Version: 5.0
Protection Mechanism: Anti reverses Connection Protection,Overvoltage Protection,Undervoltage Protection,Overheating Protection,Overcurrent Protection,Short Circuit Protection
Features:
- High Definition HIFI Stereo sound effect: The ZK-HT21 power amplifier board built in two TPA7498E power amplifier chips, TPA7498E is a high performance class D power amplifier chip, can make the device maintain ultra low distortion in the whole audio frequency band and show high resolution audio at the same time. The wiring around the chip is an window tin spraying design to increase the output power. 4 x Low noise preamplifier 5532 group can improve the sound quality and volume, increase the gain.
- Multiple Audio Input Modes: This Mini amplifier receiver built-in bluetooths 5.0, flash disk, sound card and 3.5mm AUX Input. bluetooths 5.0 mode, faster transmission speed, lossless decoding, lower distortion rate, connection distance to audio equipment is 15m/49ft. Note: When using AUX mode, please confirm that the bluetooths connection of this module has been disconnected.- 2.1 Channel Subwoofer Audio Amplifier Board: This ZK-HT21 power amplifier is 2.1channel, allows you to connect 2 passive speakers and drive a subwoofer, comes with Treble and buttons, independent subwoofer volume adjustment buttons and 20-200Hz subwoofer frequency adjustment buttons, which is very friendly for audiophile, you can adjust the Treble and buttons, make the more shocking and the treble clearer, make the sound more layered. The module is also equipped with a multifunctional dial wheel, which can be used to select the audio input method, adjust the volume, pause or play, and also choose to play the previous or next music.
- Multiple Protection Function: This bluetooths amp module is designed with multiple protection mechanisms, include over-voltage protection, under-voltage protection, over-heat protection, short-circuit protection, reverses connection protection, with case to protective it. Besides, there is a long life ultra quiet fan(Stall proof motor protection, no noise) above audio chips, used to reduce the overall temperature of the module, dissipate heat for power supplies, amplifier chips, and filtering capacitors, reduce temperature rise and its impact on sound quality, and ensure long-term stable working of the components.
- 160W * 2 + 220W High Power Output: This HT21 audio amplifier has a maximum output power of 160W for the left and right channels respectively, and a maximum output power of 220W for the subwoofer. It can drive two high-power speakers (30-200W, 4-8 ohms) and one subwoofer (30-220W), and the adapted power supply is DC15-36V/8A or above. The higher the power supply voltage/current, the higher the output power, and the lower the speaker resistance, the higher the output power. The power adapter power must be higher than the actual working power of the amplifier.
Dial Wheel Button Settings:
- Short Press: Pause/Play
- Long Press: Switch Input Mode (bluetooths/AUX/ Flash drives)
- Dial Left Short Press: Play The Previous Music
- Dial Left Long Press: Volume Decrease
- Dial Right Short Press: Play The Next Music
- Dial Right Long Press: Volume Increases
At higher volume levels, audio output exhibits signal clipping and muddiness.
- Mitigation: Reduce master gain or use a power adapter with higher voltage compliance.
Audio stuttering occurs at elevated SPLs. Root causes:
- (a) Insufficient PSU wattage triggering intermittent shutdown.
- (b) Thermal throttling from sustained high-power output.
- Resolution: Upgrade to higher wattage PSU or implement active cooling.
End-to-end audio fidelity is governed by systemic synergy, not solely the amplifier module. Critical components include:
- Signal integrity: Interconnect cabling (impedance stability)
- Power delivery: PSU noise floor & ripple suppression
- Signal processing: Tone control circuit linearity
- Transduction: Loudspeaker THD & frequency response
- Environmental: Acoustic loading & ambient noise
- Optimal performance requires matching: Source, PSU, Amplifier, Transducer.
Place of Application: - Car Audio System / DIY Speakers
Note:
- The casing of the amplifier board needs to be assembled by oneself.
- The input power must be greater than the actual working power of the amplifier.
- Only when the audio signal input is strong enough and the power supply voltage and current are large enough, can sufficient output power be guaranteed.
Package Including:
1 x Power Amplifier Board
1 x Set Protective Shell
1 x Screwdriver
5 x Knob
1 x DC Plug
The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.
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