L1794A5 Integrated Classic PCM1794 USB Bluetooth Decoding LA5 Pure Class A Headphone Amplifier

Description:
- L1794A5 is an all-in-one device that integrates classic PCM1794 decoding and mature LA5 pure A headphone amplifier. It can be connected to regular front-end devices such as computers, mobile phones, tablet PCs, etc. through USB port or Bluetooth. Bluetooth supports high bit-rate protocols for LDAC and APTX, but for iOS series products can only support for AAC, which may result in reduced performance. It can also be connected to USB port through OTG.
- Its decoding circuit is mature, and the headphone amplifier circuit has a huge thrust and excellent quality, so it can only be paired with a HiFi large earphone to fully display its characteristics. Some ordinary computer multimedia earphones or small earplugs are not suitable for pairing with it.
- As a pure Class A circuit design, the disadvantage of heat generation is unavoidable, with a temperature rise of 50-60 degrees during operation. You need to understand this in advance.

Features:
- Adopting a classic pure A-class circuit design, high power consumption is exchanged for low distortion and listening experience in the full power output segment.
- Ultra high output voltage amplitude (up to nearly 30V voltage swing).
- Ultra high current output capability (up to nearly 350mA).
- The decoding part adopts the classic solution for Qualcomm 3084 chip + PCM1794 to achieve high-quality USB and Bluetooth decoding.
- Integrated LA5 pure A-class headphone amplifier that has been widely recognized by audiophiles for over 10 years.
- A 50W customized ring transformer with 20000 microfarads amplifier level filtering power supply system provides sufficient energy. The decoding part adopts 4 independent linear voltage regulators to ensure that the digital, analog-to-digital conversion, IV, and LPF parts are completely independently powered.
- Advanced materials, ALPS27 potentiometer, high-power field-effect transistor, OPA2064 + AD712 + AD847 operational amplifier combination.
- Provide a comprehensive headphone protection circuit, including startup delay, pre shutdown cut-off, and DC output detection.

Specification:
Decoding Parameter:
- Input interface: Bluetooth, USB square port
- Input format: PCM 44.1 - 96K
- Bluetooth supported format: for LDAC, APTX, APTX HD, AAC, SBC
- Line output: RCA stereo socket
- Line output level: 2.8Vppm
- THD+N: -129dB

Headphone Amplifier Parameter:
- Headphone impedance: 16 - 600ohms
- Distortion: <0.01% at 1kHz Vppm=20V RL=300ohms
- Output noise level: -92dB
- Output impedance: 1kHz sine wave equivalent undistored power : 300mW/600ohms; 1200mW/32ohms

General Parameters:
- Power consumption: <30W
- Input sensitivity and impedance: 100mV/50K
- Product size: 230 x 190 x 45mm
- Net weight: about 3kg

Package Included:
- 1 x Headphone Amplifier