Mini Home Audio System 2pcs Set Power Supply + Media Player / DAC Decoder / Headphone Amp Optional

Mini Home Audio System 2pcs Set Power Supply + Media Player / DAC Decoder / Headphone Amp Optional

Instruction:
DP-4 Stream Media Player
Raspberry Pi 4B platform, quad-core 1.5GHz 64-bit ARM Cortex-A72CPU super computing power. AK4137 design that with convertible sample rate (SRC), can be converted between PCM-DSD at will. The clock recovery circuit with ultra-low Jitter makes the streaming media playing clock reach a very stable level.

Support DSD256 Playback and with Downward Compatibility
You can access music files through SD card, mobile hard disk, WIFI, wired network, Bluetooth, etc., which greatly improves the convenience and compatibility of use.

DA-4 Full-balanced Decoder
Adopt AK4493 decoder chip, which is 123dB 768kHz / 32-bit 2ch Premium DAC chip, the most cost-effective chip in the 449X series, can greatly reduce noise, provides higher quality and pure sound, satisfying master tape HD format playback and reproduce real live music.

Pure Class A Headphone Amplifier
Adopt fully discrete (the circuit is built with transistors) fully symmetric circuit, superior to the transient response of asymmetric circuits, with lower cross distortion and every detail is full, rich and clear.

PO-4 Power Supply Unit
Independently powered, with dual configuration can satisfy different requirements
1. Pure DC storage battery configuration, adopt 12V 21Ah large-capacity lithium battery as power supply, 8-10 hours of long battery life, and the power supply environment is pure and interference-free.
2. AC adapter power supply, powered by linear large capacity toroidal transformer, and makes large dynamic voltage regulation by PO-4, which is cleaner than the switching power supply.

Specification:
DA-4 Decoder
Input interface:
Coaxial: COAX PCM SPDIF input
I²S: support PCM / DSD / DOP
Bluetooth: Qualcomm CSR8675 Bluetooth 5.0
Output interface:
4.4: Five-core balanced output
RCA: Unbalanced output
Support format:
PCM: 44.1 / 48 / 88.4 / 96 / 176.4 / 192 / 352.8 / 384 KHz 16 / 32-bit
DSD: DSD64 / DSD128 / DSD256 (2.8224-22.5792MHz)
Bluetooth: SBC / AAC / APTX / LDAC

AM-4 Fully Balanced Amp
Input interface:
Balanced: 4.4 five-core socket
Unbalanced: dual RCA socket
Output interface:
Balanced: 4.4 five-core socket
Unbalanced: 6.35mm three-core headphone jack
Frequency response: Hz-100KHz (-1dB)
Distortion: -100dB (Output: 2Vrms 1000Hz)
Output power: 1W

DP-4 Streaming Media Player
Computing platform: Raspberry Pi 4B
Input interface: WIFI / Ethernet / USB2.0 / USB3.0 (support SD card and Hard disk)
Output interface: I²S / coaxial / optical
Support format: DSD / DSF / DIFF / ISO / PCM / FLAC / ALAC / WAV / AIFF / AAC / PM3 etc.
Sampling rate:
PCM: 44.1KHz-384KHz, 16-32bit
DSD: 2.8MHz-11.2MHz, 1bit

PO-4 Linear Power Supply
AC adapter: 220V AC socket with switch
Regulated input: 12V dual-core aviation socket * 1
Regulated output: DC 5V (total current 6A) socket * 3
Lithium battery capacity:  12V21Ah
AC power consumption: 35VA

Packing List:
-1 x Power Supply
-1 x Other Audio Unit

Note:
1. The whole audio system has 4 units available: power supply (standard standard configuration), streaming media player, DA-4 Decoder, AM-4 headphone amplifier are arbitrarily optional.
2. The 2-piece set includes a power supply and one arbitrary other  unit. Please tell us the unit you want before ordering, thank you.