AMNVOLT V4B ATS MINI SI4732 DSP radio receiver FM AM SSB LSB with wired headphone function

AMNVOLT V4B ATS MINI SI4732 radio receiver — a compact, all-band DSP radio receiver designed for radio enthusiasts and those who appreciate high-quality signal reception. Using the SI4732 DSP chip and ESP32-S3 controller, the device receives FM, AM, LSB, and USB signals, and the latest V4B board version ensures lower interference and more stable operation.

AMNVOLT V4B ATS MINI SI4732 DSP radio receiver — key features

• SI4732 DSP chip — receives all frequency bands, supports FM, AM, LSB, USB modes, and AGC/ATT functions for high-quality signal processing.
• Improved V4B board — includes a shielding cover to protect against electromagnetic interference and ESD protection for the chip at the antenna input to ensure safety.
• Wired headphone antenna function — the headphone cable can be used as an additional FM antenna in areas with strong signals, improving reception.
• 1.9 inch IPS color display — displays battery level and allows you to adjust the backlight brightness from 32 to 255 levels.
• 1W power speaker — provides clear and pleasant sound, and the headphone amplifier circuit allows you to listen loudly through headphones.
• Original ESP32-S3-WROOM-1-N16R8 module — uses a genuine, non-counterfeit module, unlike some other cloned models.

Technical specifications

• Model (hardware version): V4B
• Housing material: metal or ABS plastic (optional)
• Main controller: ESP-32-S3
• Operating modes: FM / AM / LSB / USB (does not support aviation frequency bands)
• Reception bands: HF / SW / MW / VHF
• Frequency range: LW, MW, SW (150kHz–30MHz), VHF (64–108MHz)
• Display: 1.9 inch, 170x320 resolution
• Display brightness: adjustable from 32 to 255 levels
• Charging port: TYPE-C (cannot use fast charging chargers)
• Audio jack: 3.5mm 3-contact stereo
• Antenna connector: SMA-KE (female, internal thread)
• Battery capacity: 800mAh
• Screen power: 1W speaker
• Software version: from VER.2.3.1 (recommended to update to the latest version)
• ESP32 module: ESP32-S3-WROOM-1-N16R8
• Package contents: 1 x AMNVOLT V4B radio receiver, 2 x antennas (telescopic rod antenna / rotating loop antenna)
• Note: headphones are NOT included in the package - they must be purchased separately
• Note: the metal casing partially shields wireless signals, which may weaken the WiFi connection

Who is it suitable for and how to use it?

The AMNVOLT V4B ATS MINI SI4732 radio receiver is suitable for radio enthusiasts, DX listeners, and those interested in shortwave reception. The device is useful for those who want to listen to FM, AM, or SSB signals with clear sound and stable reception. Using wired headphones as an FM antenna will give the best results in areas with strong signals and with a longer headphone cable. The firmware can be updated independently according to the instructions.

Buyer questions

Question: Do headphones come included in the package?
No, headphones are not included in the package. The headphones shown in the pictures are only for demonstrating the FM antenna function. The customer must provide headphones separately.

Question: What is the difference between the V4 and V4B versions?
V4 is a fixed model name, while V4B is the latest batch of board production. From the beginning of 2026, all boards sold will be V4B, even though the casing will continue to be marked as "V4".

Question: Can I use a fast charging charger?
No, the TYPE-C connector does not support fast charging chargers. The battery capacity is 800mAh, so it is recommended to use a standard charger to ensure safe operation.

The AMNVOLT V4B ATS MINI SI4732 radio receiver is an excellent choice for radio enthusiasts looking for high-quality all-band reception and modern features in a compact case.

Sources: Software Defined Radio (SDR) | TopSmart store