QLS-HiFi F1000 Mains Audio Power Purifier Filter AC power socket
F1000 selects the unique patent filter method, broke through the traditional LC filter element, not can only eliminate in effectively the electrical network the disturbance and the noise and causes it to fall to lowly, moreover may cause the Hi-Fi, AV sound system's music signaling to be quicker, music low frequency transient response is better,

QA01--USB&Analog; to SPDIF(Coaxial&Optical;&I2S;) Digital Audio Converters
QA01 is a HiFi digital converter by QLS-HiFi, It can convert analog RCA (L + R) to PCM Digital Audio output, You can connect it to your old CD, DAT, LP, so that they can have the digital audio output, Use it you can connect to your HiFi DAC decode, Use it you can connected to your MD for recording.

QA100--Full Digital Stereo Amplifier

QA350 MOD V2--SD Card WAV High Fidelity Music Player
QA350 MOD V2 is new mod version of QA350, It upgraded the headphone amp chip MAX9722A to AD8397 chip, It sounds damn good. It has the capability to drive any headphones available in the high-end with ease.
QA350 MOD V2 has a very large output power:
QA350 Output Power: 70mW/16Ω; 130mW/32Ω; 26mW/150Ω; 13mW/300Ω;
QA350 MOD V2 Output Power: 500mW/16Ω; 250mW/32Ω; 97mW/150Ω; 49mW/300Ω;

Mini1543 DAC (TDA1543+DIR9001) NOS DAC Kit (Board)
--This is an enter lever DAC, DAC Chip for Philip TDA1543.
--This DAC can use for multimedia system, satellite radio, CD player and DVD
--Player(two channel)
--Using DIR9001 as digital input receiver
--The receiver used is more expensive and of better quality than the popular CS8412/4/6
--Used in all other DACs. It has many more music details and accurate sound you obtain.
--Coaxial / Optical Input , Analog Output

QA350 SD Card WAV High Fidelity Music Player
QA350 is a WAV high fidelity music player designed and made by QLS Electronics. SD card is applied as storage medium while lossless WAV format as the sound source. The player integrates DAC and headphone Amplifier circuit with the built-in high-capacity rechargeable lithium polymer battery. It is convenient to carry with and play music.

Mini PCM1793 DAC SPDIF + OPTICAL DAC
This Mini DAC made with high-quality component......Nichicon capacity, WIMA capacity

QA550 SD Card WAV High Fidelity Music Player
Discover more music than ever before from your CDs and digital downloads – a music player QA550.
QA550 Player Every aspect of the product is meticulously designed to protect and maintain the pure, delicate music signal and ensure the highest possible level of performance.
WAV Player is replace your CD player , high accuracy clock and the sophisticated digital output circuit, far superior to most CD player, no matter the speed, stability, error correction, jitter reduction. They are actually the technology of different eras. It provides better sound quality, larger storage capacity .
It effectively isolated the serious interference from within the PC/Mac case. e.g. the high frequency data signals, the switching-mode power supply and the FAN motors, etc…

NG94 MKII Desktop DAC Hi-End PCM1794 USB DAC+Headphone Amp
Part of the analog signal to a fully symmetrical layout of the way, delicate appearance. The use of high-quality HIFI components assembled: Yageo SMD resistor, Nichicon exclusive audio capacitance, CBB for all of use WIMA, PHILIPS high-speed rectifier. Digital filter use Burr-Brown DIR9001, I / V conversion and LPF use AD OP275GS and BB OPA2134UA, coupling used BENNIC XPP capacitance, raise the overall tone guaranteed. Audio components are all part of the 1% precision matching to ensure that every detail of the audio can restore unabated.