DDX320_v2 all digital amplifier board User`s manual V1.1
Contents
1. DDX320_ v2 all digital amplifier board User s manual V1 1 1 Overview DDX320 board is a digital amplifier with S PDIF digital audio input and output directly to speakers The volume channel and other configuration can be easy controlled by a rotary encoder or a remote controller and value state will be displayed on the LED module panel All functions are handled by the MCU on board 2 Electrical specifications Operating conditions Vcc DC 28V Tamb 25 C unless otherwise specified Table1 Specifications list PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Vcc AC dual rail 12 20 26 V Power supply DC 15 28 36 V voltage Po 2 0 channel RL 80 VCC 35 V 75 W Output power RL 60 VCC 36 V 100 W RL 40 VCC 30V 65 W Woofer RL 80 VCC 35 V 80 W RL 40 VCC 35V 160 W SNR 100 dB SR 32 192 kHz Sample rate Resolution 24 bit 3 Function Description 3 1 Inputs 3 1 1 Coaxial H 1 2 and Optical Z H 3 4 inputs Up to 192kHz 24bit S PDIF signal can be accepted 3 1 2 External CH S 8 inputs The board accepts another 4x inputs by setting the SW 1 on See Table2 for details Inputs 5 and 6 are S PDIF mode and Inputs 7 8 are CMOS mode 3 2 Outputs The output can be setup for 2 0 or 2 1 channels See Table2 for details The subwoofer output is not active when 2 0 mode 3 3 Hardware setup Some functions can be configured or switch on off by DIP 4 switch on2. board list in Table2 Table2 DIP 4 switch description SWITCH NAME STATE DESCRIPTION NUMBER 1 8 4 x inputs ON Up to 8 inputs external inputs active OFF Up to 4 inputs 2 Display dimming ON Display auto off after 5sec OFF Display always keep on 3 2 0 2 1 output mode ON Output 2 0 mode OFF Output 2 1 mode 4 10dB ON Maximum volume up to 10dB OFF Normal with volume of 0dB max 3 4 Display and Control 3 4 1 display DDX320 use a 4 digital 7 segment LED display The LED will display volume channel EQ bass volume and bass crossover frequency LED will be auto off when DIP 4 switches set to OFF details in Table2 3 4 2 Control by rotary encoder we call it EC in short below 3 4 3 Control by a remote controller Volume adjustment turn the EC to left or right to control volume down or up Channel switching press the EC button to control the channel switch from CH1 to CH3 by cycling Standby Wake up press the EC button up to 3 sec to enter the standby mode or back to active ON state After remote learning some advanced functions like EQ and display brightness can be used by remote Follow these steps to enter remote learning mode 1 5 6 Power off Release the button until display 200 2 Press and hold on the rotary button during power on 3 4 Use a remote to enter keys The number on display will automatic added when key enter Please follow table 3
3. for key sequence The number will back to G43 when press any key after EEE for a new learning cycle Press the rotary button to exit learning mode The new remote can be used and all keys will be remembered after power off Note not all keys needed to set Press one key twice to jump the un used key The remote control functions list in table3 Table3 Remote key functions Key number Key name function Display VW POWER Enter the standby or wake up for stand by eee MUTE Mute enter exit when mute 444 7333 VOL VOL Volume increase decrease 6667555 CH CH Channel switch up down m EQ Preset EQ EQ bypass x means value same as below E O0 EQ Flat E 001 Flat amp O2 Rock E 003 Soft Rock amp O4 Jazz amp O S Classical amp 05 Dance E 07 Pop E 008 Soft E 009 Hard E 1 0 Party E xx E 1 1 Vocal amp 1 2 Hip Hop E 1 3 Dialog E 1 4 Bass Boost 1 E 1 S Bass Boost 2 E 171 E Bass Boost 3 ggg MODE Setup the crossover frequency O00 pass through O80 80Hz etc range from 80 to 360hz XXX 9o9 MIX Switch the left and right channel on output 1 2 org2 AAR DFT Restore the default configuration DFT BBE TONE Enter exit bass volume mode BI xx EEE F1 DoD F2 EEE F3 Checking EQ Checking Channel number Adjust the brightness of dis
4. play 7 Installation PCB Size 135 105mm 8 Q amp A
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