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Fosi Audio ZK-TB21 Bluetooth 5.0 Stereo Audio Receiver Amplifier Board 2.1Channel Mini Wireless Digital AUX Amp Module Bass and Treble Control for Home Passive Speakers Subwoofer TPA3116D2 50Wx2+100W

4.4 out of 5 stars 247 ratings

Price: $49.99
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Colour Name: ZK-TB21
ZK-TB21
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Voltage 12 Volts
Manufacturer Fosi Audio
Brand Fosi Audio

About this item

  • CHIP: TPA3116D2 (with AM interference suppression function), 2.1 CH stereo output power 50watt * 2+100watt, working voltage range DC12-24V, for 4-8Ω, 50watt-300watt passive speakers.
  • Treble & Bass and subwoofer control: With subwoofer volume control, L and R channels Treble & Bass independent control. Built-in low pass filter for subwoofers with sub frequency control, small simple compact design but practical and powerful.
  • Bluetooth and AUX Inputs: almost compatible with all home audio devices such as smartphones, iPhone, iPad, MP3, PC, CD players, etc. Enjoy surround acoustic audio with the speaker.
  • Ensure Safety: This Bluetooth amplifier board has a bottom plate and a top plate, support reverse connection protection, Over-voltage and Under-voltage Protection, Over-heat protection, Short-circuit protection.
  • Friendly Customer Service: 18 months warranty and lifetime technical support. If you have any question, please contact us at any time.

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Product Information

Colour Name:ZK-TB21

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  • Fosi Audio ZK-TB21 Bluetooth 5.0 Stereo Audio Receiver Amplifier Board 2.1Channel Mini Wireless Digital AUX Amp Module Bass a
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Product Description

ZK-TB21 Bluetooth 5.0 Mini Power Amplifier Board
ZK-TB21 Bluetooth 5.0 Mini Power Amplifier Board
ZK-502T ZK-1002T ZK-502C ZK-1002L ZK-1002 ZK-TB21
ZK-502T ZK-1002T ZK-502C ZK-1002L ZK-1002 ZK-TB21
Input Mode Bluetooth 5.0+3.5mm AUX Bluetooth 5.0+3.5mm AUX Bluetooth 5.0+3.5mm AUX Bluetooth 5.0 Bluetooth 5.0+3.5mm AUX Bluetooth 5.0+3.5mm AUX
MAX Power Output Per Channel 50W×2 100W×2 50W×2 100W×2 100W×2 50W×2+100W
Bass and Treble Control
Terminating Impedance 4Ohm-8Ohm 4Ohm-8Ohm 4Ohm-8Ohm 4Ohm-8Ohm 4Ohm-8Ohm 4Ohm-8Ohm
Work Voltage DC 5V-24V DC 12V-24V DC 5V-27V DC 5V-24V DC 5V-27V DC 5V-24V

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4.4 out of 5 stars
4.4 out of 5
247 global ratings
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There are 0 reviews and 1 rating from Australia

Top reviews from other countries

Franzdx
4.0 out of 5 stars MINI con un suono sorprendente, a patto di non aspettarsi ciò che non può dare..
Reviewed in Italy on 20 August 2020
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21 people found this helpful
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DIYer
4.0 out of 5 stars Good but could have been better
Reviewed in the United Kingdom on 30 October 2020
Colour Name: ZK-502TVerified Purchase
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4.0 out of 5 stars Good but could have been better
Reviewed in the United Kingdom on 30 October 2020
I bought 4 of these, blew one up through my own fault, but 3 went into 3 bluetooth boxes I made. Pros: easy to connect, sound is great, bass and treble is good call. Cons: if you turn volume knob off and LED goes off, it doesn’t disconnect from the phone, means the sounds get diverted to switched off speaker, so you need to unplug it every time. There is a noise gate that turns the output off if there is no signal, unfortunately you can hear how it operates on quiet song intros.
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2 people found this helpful
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Claudio Panichi
1.0 out of 5 stars Molto male la gamma medio/alta.
Reviewed in Italy on 27 December 2020
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1.0 out of 5 stars Molto male la gamma medio/alta.
Reviewed in Italy on 27 December 2020
Purtroppo, a una prova attenta, si registra un calo di SPL già a 3 kHz. A 5 kHz la potenza è di fatto dimezzata. All'ascolto c'è una grossa pecca in gamma medio-alta.
Peccato, perché il BT funziona egregiamente e non c'è traccia di rumore/disturbo in uscita, ma onestamente non lo ritengo utilizzabile per un ascolto di qualità, deteriora in modo esagerato tutta la gamma sopra i 2-3 kHz.
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17 people found this helpful
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Mr. B Wright
1.0 out of 5 stars Terrible
Reviewed in the United Kingdom on 19 August 2020
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One person found this helpful
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JASON PROUDLEY
5.0 out of 5 stars Value for money.
Reviewed in the United Kingdom on 25 October 2021
Colour Name: ZK-502TVerified Purchase