Feature:
1. The use of high-quality materials is guaranteed
2. Bridge single-channel 600W, dual-channel 300W+300W
3. Easy to use, temperature control/manual control fan
4. Use oxygen-free copper wire to improve sound quality; The magnetic shielding mechanism has strong EMI resistance
5. With front stage amplification, 26-36dB adjustable
Product parameters:
Product name: 300W dual channel /600W mono pure post-level power amplifier board
Power amplifier chip: original TPA3255
Product model: ZK-3002
Adaptive power supply: working voltage range 18-50VDC, limit 53V. It is recommended to use a DC power supply with a voltage of 36-48V and a current of more than 10A. The higher the voltage, the greater the output power.
Adaptive speaker: 3-8 ohms, 50-300W in BTL dual channel mode; PBTL mono mode 2-8 ohms, 100-600W
Heat dissipation mode: temperature control automatic air cooling, or manual selection of fan rotation.
Gain selection: Potentiometer 10-speed adjustment, 26dB-36dB
Bridge mode: Power off first, switch the DIP switch No. 1 to the ON position, output R+L+ short-circuit parallel output, R-L- short-circuit parallel output.
Maximum power:
In BTL mode, 2*300W@50V 4Ω, 160W@50V 8Ω;
In PBTL mode, 600W@50V 2Ω, 300W@50V 4Ω, 160W@50V 8Ω
Protection mechanism: input undervoltage, overheat, overcurrent, short circuit protection. No input anti-reverse protection, positive and negative terminals can not be reversed!
Package included:
1* TPA3255 AMP
2.Preamplifier 
3Decoder Board
Features:
1. On board antenna, with an open transmission distance of about 50 meters, there is no need for an external antenna. If installed in a metal shell to avoid signal shielding, you can purchase an external antenna for installation and reserve an IPEX antenna base.
2. It has an I2S output interface, which can be connected to power amplifiers with I2S input function. It also has a button extension interface to achieve up/down song switching, pause/play, volume adjustment, and strong scalability.
3. There is a TYPE-C USB interface left for PC sound card connection or USB power supply. For the QCC5125 model, official software can be connected via USB to perform EQ operations on internal DSP, only for experienced enthusiasts with software foundation.
4. Complimentary acrylic shell and fixed magnetic column, magnetic adsorption type fixed installation, convenient and fast.
5.QCC3034+PCM5102A, lossless transmission, lossless decoding, no loss, perfectly displaying various dynamics and details of sound, without burrs at high frequencies, rounded mid-range, powerful low-frequency, and good elasticity. Extremely high parameter performance: dynamic 112dB, signal-to-noise ratio 112dB, distortion -93dB, no harm without comparison.
6. The key parts use fever capacitors, which perform well in parameters such as dissipation factor, leakage current, ripple current, ESR, etc., improving the speed, dynamics, texture, and density parameters of sound, and enhancing the overall quality of high, medium, and low frequencies. Different temperatures, voltages, and frequencies can all affect sound quality, and a good dissipation factor can reduce the impact. The small leakage current of the capacitor reduces the degree of aging, prolongs lifespan, reduces noise, and reduces high-frequency impedance with low ESR, increasing dynamic response speed.
Product parameters:
Power supply range: DC8-32V (AC power supply not supported, please use DC voltage)
AUX and Bluetooth are switched through a signal relay, with Bluetooth taking priority. When Bluetooth is not connected, it will automatically switch to AUX
Bluetooth chip: QCC3034
DAC chip: PCM5102A
Shipping does not include USB and audio cables
Packaging list:
1* Bluetooth Receiver
1* Antenna
1* XH2.54-2P power cord
2* XH2.54-3P shielded wire
