BRZHIFI PA-428PRO Class D HiFi Audio Power Amplifier 200W+200W STK428-640 Stereo Amplifier with RCA Cable

BRZHIFI PA-428PRO Class D HiFi Audio Power Amplifier 200W+200W STK428-640 Stereo Amplifier with RCA Cable

Features:
- The STK428-640 module adopts for PWM CMOS logic level audio input mode. This audio input mode can effectively reduce noise, distortion, and interference, greatly improving the clarity, dynamic range, and fidelity of audio, thereby bringing users a more outstanding auditory experience.
- It has many characteristics such as high efficiency, low heat generation, high power, and excellent sound effects, which can meet more than 99% of audio amplification needs. 200W power can be obtained for each channel under a load of 4 ohms, with a distortion degree (THD) of only 0.8%.
- Ultra-thin 400W high-power ring transformer, all copper wire winding, with a height of only 3CM and a diameter of about 14CM, occupying about 1/2 of the entire power amplifier. The powerful power source of the amplifier comes from the transformer, and the powerful power reserve is like the giant A-core breakpoint transformer of a car engine, providing a continuous source of energy for power amplification.
- Adopting high-end audio decoding chips, supporting multiple lossless audio formats, it can accurately analyze music details, bringing you an immersive auditory experience. Its unique audio processing technology effectively reduces background noise, making the sound purer and more transparent. Whether you appreciate the delicate emotions of classical symphonies or feel the dynamic rhythm of popular music, you can immerse yourself in it.
- In some high-end audio systems, even when processing high-resolution audio signals, RCA sockets can still function with their stable transmission performance. By using high-quality RCA audio cables, effective transmission of high-quality audio signals can be achieved, meeting the high requirements of music enthusiasts for sound quality.

Materials:
- For ALPS volume potentiometer: Compared with ordinary potentiometers, this original potentiometer has obvious advantages and characteristics. Ordinary potentiometers can produce noise such as "squeaking" sounds when adjusting volume, poor left-right balance, easy introduction of noise, poor resistance to harsh environments, and poor contact, causing significant rotational noise, which is difficult to accept. ALPS potentiometers effectively overcome these issues and maintain stable performance over extended periods of use.
- Multi machine protection system:
  Integrated DC protection system: automatically detects the internal circuit condition of the machine, automatically disconnects the connection between the circuit and the speaker, ensuring that the speaker is always working in a safe state.
  Anti-impact delay system: prevents the speaker from being impacted at the moment of startup, and eliminates the popping sound caused by startup.
  Temperature overheat protection system: When the temperature exceeds the safe range, it can automatically reduce the current and output, protecting the overall safety of the machine.
- Input/output terminals: The input and output terminals use gold-plated analog audio input terminals to maintain a stable connection with the signal source. And it supports multiple input selection, without the need to repeatedly plug and unplug signals.
- Imported filtering capacitors: original imported electrolytic capacitors are used for filtering, with power ripple as low as millivolts, and multi-stage filtering does not interfere with each other. The high current rectifier and large capacitor filter create the driving capability of wide dynamic and low impedance speakers.

Bluetooth5.3:
- Bluetooth version 5.3 has higher bandwidth and lower latency than the typical 5.0 version, making it suitable for lossless music reception.
- Compared to Bluetooth 5.1 version, Bluetooth 5.3 can bring twice the data transmission speed and an 800% increase in data transmission capacity.
- Using Bluetooth 5.3 allows for faster transmission and reception of more data.
- Different working distances: Compared to Bluetooth 5.1 version, Bluetooth 5.3 has increased its bandwidth (transmission speed) from 1Mbps to 2Mbps, increasing the transmission distance by four times, which means the theoretical effective working distance is 300 meters. Low power mode is also available.

Specification:
- Channel: 2 channels, stereo
- Power: 100W x 2 (8ohms), 200W x 2 (4ohms), RMS rated power
- Amplifier: STK428-640 for SANYO
- Interface: RCA 1/RCA 2/RCA 3/BT
- Material: ring transformer, ALPS potentiometer, imported filtering capacitor, aluminum alloy shell
- Product size: 330 x 210 x 55mm (error: 1 - 2mm)
- Net weight: 5.2kg
- Speaker: suitable for medium and large size bookshelf speaker/floor standing speaker
- Frequency response range: 10Hz - 30kHz
- Output impedance: 4 - 16ohms
- Input sensitivity: 275mV
- Input impedance: 50Kohms
- Static power consumption: 10W
- Input voltage: AC 230V

Package Included:
- 1 x Power Amplifier
- 1 x RCA Cable