Budget amplifier ZK-1002L, assembly and test

ZK-1002L 1002 100WX2 TPA3116 Mini Bluetooth 5.0:https://www.amazon.de/-/en/dp/B098XDMW2P/ref=sr_1_3?keywords=ZK-1002+L&qid=1680501862&sr=8-3
Let me introduce a ZK-1002L amplifier to you.
0:05 It comes in parts.
It works with 2 sets of TPA3116 chips with Bluetooth 5.0, but there is no AUX port
It can work with different power supply between 5V-24V
Initial power when using 12V DC power supply:
• 2x24W – 8 Ohm;
• 2x 40W – 4 Ohm;
Initial power when using 15V DC power supply:
• 2x32W – 8 Ohm;
• 2x 60W – 4 Ohm;
Initial power when using 19V DC power supply:
• 2x64W – 8 Ohm;
• 2x 80W – 4 Ohm;
Initial power when using 24V DC power supply:
• 2x72W – 8 Ohm;
• 2x 100W – 4 Ohm;
It seems the cooling is good enough, but we will double check that in the process.
It will now work with 24V power supply.
The recording is made with Rode Stereo Videomic Pro, from a 1.2 meters distance.
2:20 The first test will be with 4-inch speakers: POWER HANDLING (RMS/MAX.) 40 / 80 Watts IMPEDANCE 6Ohm.
We go to 50% of the amplifier powers.
On 50% it`s doing well- no sound distortion.
3:24 We now go to 100% of the amplifier power.
It is doing well. Almost no sound distortion.
I would even say that the power is little too much for those speakers.
The recording is made with Rode Stereo Videomic Pro, from a 1.2 meters distance.
4:27 These are pretty old-school speakers: POWER HANDLING (RMS/MAX.) 80 / 120 Watts SENSITIVITY 88 dB IMPEDANCE 8 Ohms FREQUENCY RESPONSE 30 - 30000 Hz
We go to 50% of the amplifier powers.
On 50% it`s doing well- no sound distortion.
5:31 We now go to 100% of the amplifier power.
It is doing well. Almost no sound distortion.
It couldn`t reach the full potential of the speakers.
6:34 And the 3rd set of speakers: POWER HANDLING (RMS/MAX.) 225 / 450 Watts SENSITIVITY (2.8V/1M) 93 dB IMPEDANCE 4 – 8 Ohms FREQUENCY RESPONSE 18 - 40000 Hz
We go to 50% of the amplifier powers.
On 50% it`s doing well- no sound distortion.
7:39 We now go to 100% of the amplifier power.
It is doing well. Almost no sound distortion.
It covers the full sound spectrum quite well.
8:40 To summarise:
In my opinion, the amplifier is doing really well when on full power, with minimal sound distortions and covers the full sound spectrum.
The cooling system did well, the temperature stayed in normal levels.
What i am saying is in accordance to the price and the class of the amplifier.
We cannot expect wonders from this small and low budget amplifier, but i recommend it- it will do the job.