Shenzhen Aikexin Electronics Co.,Ltd is one of the leading China 5.1 dts/ac-3 digital audio decoder manufacturers and suppliers,Website:http://www.szaikexin.com, and also a professional company. Features: 1.Convert DTS/AC3 source digital audio to analog 5.1 audio or stereo audio output 2.The analog stereo(L/R)signals after digital processing chip handle convert it to analog 5.1 channel output 3.Multi-channel audio input(SPDIF, Coaxial,Stereo) 2 x SPDIF input,1 x Coaxial Input, 1 x Stereo Input 4.Analog 5.1-channel or Stereo output 5.Dimension:105*75*25 mm Technical Data: 1. Signal to Noise: 120db  2. Degree of Separation: 85db  3. Frequency Response: (20Hz ~ 20 KHz) +/- 0.5db  4. Max Output Volt: 2.2V  5. Power Supply DC/5V 1A, (outlay 110V~240V broadband convert DC5V Power) Product Interface Schematic DC/5V------------- Power input Input ---------------- Source short, switch  Input channels (SPDIF, COX, AUX, While D1/D2 /D3 corresponding LED lights) 2.1/5.1--------------- Switch 2.1 or 5.1 analog audio OPT1 --------------- SPDIF1 input interface OPT2 --------------- SPDIF2 input interface COX ----------------- Coaxial input AUX ------------------ Analog stereo input  Optical fiber cable or coaxial connection PS3/XBOX360 / HD players Power --------------- Power indicator, power post-Always D1 -------------------- When you press the S key, switch to the OPT1, D1 lights D2 -------------------- When you press the S key, switch to the OPT2, D2 lights D3 -------------------- When you press the S key, Switch to the COX, D3 lights (When switch to only POWER light is on, the input is the AUX(stereo) channel) FL--------------Connect Amplifier FL interface     FR--------------Connect Amplifier FR interface   SL------------- Connect Amplifier SL interface SR-------------Connect Amplifier SR interface CEN ------------Connect Amplifier CEN interface SW ------------- Connect Amplifier SW interface