Home
USER MANUAL - COMM-TEC
Contents
1. Dual mono function The user can sum up the stereo audio to two times mono audio Microphone mixer function The microphone will be mixed to the line audio output and separately controllable MIC input supports 48V phantom power condenser microphone available MIC port with balance switching can support balance unbalance signal suppress the external noise effectively Auto noise gate It keeps detecting the audio and MIC input and muting the output when there is no input coming Ultra low inrush current no need for power sequencing This allows multiple MMA220B to be powered on simultaneously without overloading power circuits Convection cooled fan is not needed Two stereo audio inputs switchable by button remote or RS232 Fast switching speed It is the high speed for the good performance Volume Bass Treble controllable by buttons or RS232 Line audio output with volume controllable Antistatic case design providing good protection for long term and stable performance LED indicator for power and working status Mini Digital Amplifier with MIC Mixer and EQ 4 Specification 1 captive screw connector 2 stereo audio 1 amplifier Input Output 1 MIC 1 stereo audio 2 RCA 1 captive screw connector Input Connector 1 3 5mm jack Output Connector 1 3 5mm jack Input Impedance gt 10KQ Output Impedance 500 stereo 4 8Q Amplifier Serial Control Port RS 232 9 pin female D c
2. Mini Digital Amplifier with MIC Mixer and EQ Cei M TEC MMA220B Mini Digital Amplifier with EQ Mixer Index 1 General Instruction trn ri rere 2 26 Product Picie dust epe trees E 2 Da Fea so iccs fea siccsdegaia ces E E E 3 4 Specification tette nete tete cocti e rera Lane 4 5 Audio Connection sssrini ein re rte ra 5 6 Buttons Controlling eese 8 7 RS232 Communication Protocol esses 10 8 System Diagram esines nnne nennen 12 9 Panel Drawing eerte rine eee aii 13 Mini Digital Amplifier with MIC Mixer and EQ VIIVI I VC 1 General Instruction MMA220B is a small digital amplifier Class D with EQ control and MIC mixer function It is compact size but powerful functions including the bridge connection dual mono EQ control microphone mixer etc It has a good application in different places including classroom small meeting room lecture hall bar pub etc 2 Product Picture ie OUTPUTS Rear Panel 2x20Watt 94Q Bridge Connection 1x40Watt p8Q Microphone Mixer 2x1 Stereo Audio with Line Out Automatic Ducking Process MIC 1 LINE 2 BASS INPUT SEL TREBLE v MUTE i Top Panel Mini Digital Amplifier with MIC Mixer and EQ e 3 Features 2x20Watt 4Ohm as the default amplifier output Bridge connection function The user can switch the MMA220B to be 1x40Watt 8Ohm by bridge connection
3. de bracket is the variable code which is the changeable 2 The bracket is not included to the RS232 commands 3 Any dot after the letters is part of the commands Example 1 Switching the input 2 to the line out We should send the RS232 command 2A1 Example 2 Turning up the volume of line audio We should send the RS232 command 603 Example 3 Preset the MIC volume to be 21 degree We should send the RS232 command 521 Example 4 Checking the working status of MMA220B We should send the RS232 commana 60095 11 Mini Digital Amplifier with MIC Mixer and EQ Cei M TEC 8 System Diagram 2x20Watt 40hm Looping connection Watt 8Ohm 7 EE E Aes at If p d Speaker3 Speaker 12 Mini Digital Amplifier with MIC Mixer and EQ e 9 Panel Drawing Unit mm 123 00 mm t 2x20Watt 40 Bridge Connection 1x40Watt 8Q e Microph e 2x1 Stereo Audio with Line Out Automatic Ducking Process 87 00 mm MIC ij 1 LINE 2 BASS INPUT SEL TREBLE wv P MUTE lt 96 00 mm 38 00 mm OUTPUTS 13
4. e connection is Switching to the MONO Speaker OUTPUTS a Speaker Connecting the four pins like this 5 1 Microphone input The microphone input of MMA220B has three different modes and different modes use different connections as the picture below Input modes switch 48V CLINE MIC 48v L LINE wc aiala INPUTS 5 2 1 48V phantom power input When the switch turns to 48V the microphone input will provide a 48V phantom power This is usually used for power supply for condenser microphone The connection is connects to anode connects to cathode and to ground NOTICE In this mode only condenser microphone can be connected with Mini Digital Amplifier with MIC Mixer and EQ e 5 2 2 MIC input When the switch turns to MIC the microphone input is used for connecting with dynamic microphone There are two different connections 1 Unbalanced connection a connects to signal and connect to ground b connects to signal and connect to ground 2 Balanced connection connects to anode connects to cathode and connects to ground 5 2 3 LINE input When the switch turns to LINE the microphone input is used for connecting with normal audio or wireless microphone output There are two different connections 1 Unbalanced connection a connects to signal and connect t
5. ith MIC Mixer and EQ 7T RS232 Communication Protocol Baud rate 9600 Data bit 8 Stop bit 1 COMM TEC Parity bit none 1A1 Switching the audio to input 1 A 1 gt 1 2A1 Switching the audio to input 2 A 2 gt 1 OAO Mute Audio of MIC and Line out Mute Audio 1A0 Mute audio of MIC Mute MIC 2A0 Mute audio of line out Mute LIN OA1 UnMute Audio UnMute Audio A 1 gt 1 Volume 30 600 Checking the working status Bass 00 Treble 00 601 MIC volume up Volume of MIC 51 602 MIC volume down Volume of MIC 51 603 Line volume up Volume of LINE 51 604 Line volume down Volume of LINE 51 605 Bass level up Bass of LINE 04 606 Bass level down Bass of LINE 04 607 Treble level up Treble of LINE 04 608 Treble level down Treble of LINE 04 A 1 gt 1 Volume 50 609 Initialization back to the default setting Bass 04 Treble 04 10 Mini Digital Amplifier with MIC Mixer and EQ Ce M TEC 5 x x 6 Preset MIC volume xx arranges from 00 to Volume of MIC 50 60 61 degrees in total 7 x x 96 Preset line volume xx arranges from 00 to Volume of LINE 50 60 61 degrees in total 8 x x Preset the bass level xx arranges from 00 Bass of LINE 04 to 08 9 degrees in total 9 x x 96 Preset the treble level xx arranges from 00 Treble of LINE 04 to 08 9 degrees in total Notice 1 The letter insi
6. o ground b connects to signal and connect to ground 2 Balanced connection connects to anode connects to cathode and connects to ground Mini Digital Amplifier with MIC Mixer and EQ e 6 Buttons Controlling The buttons provides the control of volume EQ control and switching 6 1 Audio switching There are two switchable stereo audio inputs one 2xRCA input and one 3 5mm jack input switchable through the buttons as below t e 2x20Watt 4Q e Bridge C nection 1x40Watt 8Q e Microphone Mixer e 2x1 Stereo Audio with Line Out e Automatic Ducking Process Source MIC Selection LINE BASS INPUT SEL TREBLE w a MUTE Mini Digital Amplifier with MIC Mixer and EQ e 6 2 Volume EQ controlling The line volume and Microphone volume can be controlled by the buttons The MIC Volume LINE volume LINE bass LINE treble will be selected by the buttons and controlled up down mute by the function buttons Please check the picture below f 2x20Watt 4Q Bridge Connection 1x40Watt 8Q e Microphone Mixer e 2x1 Stereo Audio with Line Out e Automatic Ducking Process MIC LINE BASS INPUT SEL TREBLE V Select the function from Turn down up the level this menu in advance Or mute the line volume For example to turn up the line volume you should select the LINE first and then press the button 4 Mini Digital Amplifier w
7. onnector Pin Configurations Frequency 20Hz 20KHz CMRR gt 70dB 20Hz 20KHz Response SNR 80dB at maximum output Bandwidth 20Hz 25KHz Stereo Channel 1 1KHz 0 8 20KHz at gt 75dB 20Hz to 20KHz THD Noise Separation nominal level Voltage Gain 32dB Power Output 2x20 Watts 4 Ohms 2 TX 3 RX 5 GND NOTE All nominal levels are at 10 Mini Digital Amplifier with MIC Mixer and EQ e 5 Audio Connection 5 1 Audio Output 5 1 1 Default output 2x20Watt 40hm The default output of amplifier is 2x20Watt 4Ohm So the user can connect the amplifier output in the regular way As the picture below Switching to the STEREO Speaker outputs Speaker Connecting the four pins like this 5 1 2 Bridge connection 1x40Watt 8Ohm The MMA220B has the bridge connection to double the output power at 1x40Watt 8Ohm It will sum up the input left channel and input right channel to be mono output and the power is up to 40Watt The bridge connection is Switching to the BRIDGE STEREO L_ BRIDGE j V OUTPUTS Bm Speaker Connecting the two pins like this Mini Digital Amplifier with MIC Mixer and EQ e 5 1 3 Dual mono output The MMA220B also has the function of double mono output It can sum up the left and right channel to be the mono audio output In this way the both of the outputs are showing the same mono audio Th
Download Pdf Manuals
Related Search
Related Contents
EA897LC(-ダクト付き-ダクトブロワー)取扱説明書 facile - Saint Manual de Usuario CGR FSX Software User Manual Copyright © All rights reserved.
Failed to retrieve file