Packing list: D4 host *1, 12v power adapter *1, gain detachable antenna *1, headphone conversion plug *1.
Reference: 12*7*3 (CM)
The Bluetooth module is the latest BTM625 Bluetooth audio module, using CSRA64215 chip, supporting A2DP, AVRCP, HFP, TWS, AAC, I2S, APTX, APTX-LL, etc., using 4M SPI FLASH memory chip. An external high-gain detachable antenna for stable signal lossless transmission.
The output part of the amp adopts the headphone driver chip TPA6120A2 chip ,More than 120dB signal to noise ratio and dynamic range.
The TDA6120A2 consists of a differential input dual-channel headphone amplifier with a voltage gain of 2V/V that can drive 15Ω-600Ω headphones.
Output power: 90mw / 600Ω, 180mw / 300Ω, 450mw / 100Ω, 610mw / 62Ω, 910mw / 32Ω, 1000mw / 16Ω
Signal to noise ratio: ≥105dB
Distortion: ≤0.003%
Frequency response: 20hz-30khz
The OPA2604AP, the classic enthusiast-grade op amp, is used as the front-end amplifier. The OPA2604AP is a dedicated op amp designed for high-performance audio systems.
D4 is also a Bluetooth audio signal receiving converter for high-fidelity audio signal lossless transmission. The output is connected to various audio equipment such as amplifiers and multimedia speakers. The analog RCA output part uses a large number of high-quality components such as high-precision custom crystal oscillators. The processing chip uses the expensive US top-level decoding chip ES9023, which uses the industry-leading ASBRE digital-to-analog conversion technology. ES9023 is a 24-bit stereo audio of ESS. The digital-to-analog converter (DAC) uses the industry-leading SABRE digital-to-analog conversion technology. This chip combines sound quality and cost-effectiveness, making it an ideal choice for digital-to-analog conversion. The ES9023 uses a patented Hyperstream architecture and time-domain jitter cancellation technology to achieve jitter-free recording quality with a dynamic range of 112dB.