[Photo] Hi-Fi dubbing control amplifier production

2003, Issue 4, Category: Audio Technology

The dubbing control amplifier is suitable for the mixing of speech and music in the process of recitation by a literary and artistic group and the inscription of a wedding video into a CD.
The microphone circuit is composed of a single op amp OP27 to form a common mode strong noise suppression circuit, which has a very strong ability to suppress current hum and line crosstalk signals. The music input and mixing part use high-speed low-noise op amp AD827 (only the L-channel part of the circuit is shown in the figure). To ensure that the amplifier reaches the Hi-Fi level, the transconductance volume control (GM) circuit is used in the microphone amplification and music channel volume adjustment to minimize the noise caused by the potentiometer. And can also improve the dynamic range of audio. In the picture, the two contacts "MIC2 IN" and "to RCH" should be connected to each other between the two channel circuit boards. In this way, the sound image localization of the voice actor is in the middle position.

Zhongbaocheng, Zhejiang



Technical area detailed analysis of Doherty power amplifier design load traction principle (top) detailed analysis of Doherty power amplifier design how to improve efficiency (lower) voltage follower input and output error analysis lm386 power amplifier energization will produce noise causes and treatment methods analysis class d Solve the effect of power amplifier on emi

Follow WeChat

Interesting and informative information and technical dry goods

Download Audiophile APP

Create your own personal electronic circle

Follow the audiophile class

Lock the latest course activities and technical live broadcast
Collect People collection
share it:
comment
Publish

related suggestion

[Photo] Two kinds of current feedback in Hi-Fi circuit

& n ...

Published on 2006-04-17 23:32 • 994 views
[Photo] Two kinds of current feedback in Hi-Fi circuit
[Photo] TDA1514A × 2 amplifier production

& n ...

Published on 2006-04-15 13:09 • 243 views
[Photo] TDA1514A × 2 amplifier production
var check_allow = "/d/Api/iscantalk.html"; var add_url = '/ d / article / write /'; function CheckLogin () {now_uid = ''; var ElecfansApi_checklogin = '/ webapi / passport / checklogin'; var logout_url = "{: U ('Login / logout')}"; var logout_url = 'http://bbs.elecfans.com/member.php?mod=logging&action=logout&refer=front'; $ .get (ElecfansApi_checklogin, function (data, textStatus) {if (data! = "") {EchoLoginInfo (data); CheckEmailInfo (data); data = $ .parseJSON (data); now_uid = data.uid; / * var login_content = 'write an article
'+ data.username +'
Quit '; * / var login_content =' write an article
'+ data.username +'
Set exit '; $ (' # login_area '). Html (login_content); var win_width = $ (window) .width (); if (win_width> 1000) {$ ("# mine"). MouseDelay (200) .hover (function () {$ ("# mymenu"). show ();}, function () {$ ("# mymenu"). hide ();});}} else {var content = 'Login Registration'; $ ('# login_area'). html (content); $ (". special-login"). click (function (e) {$ .tActivityLogin (); return false;});}});} $ (function () {// comment ------------------------------- var comment = $ ("# comment"); var comment_input = $ ("# comContent"); // Submit comment click event interaction $ ("# comSubmit2"). on ('click', function () {var content = comment_input.text (); // Empty input box comment_input. html (""). focus (); // Submit data to the server $ .ajax ({url: '/plus/arcComment.php', data: {aid: $ ("# webID"). val (), dopost : 'apiPubComment', content: content}, type: 'post', dataType: 'json', success: function (data) {// Data format returned: if (data.status == "successed") {// Build temporary comment DOM var dom = ''; dom + = '
'; dom + =' '; dom + ='
'; dom + ='

'+ data.data.username +' '; dom + ='

'; dom + =' '+ content +' '; dom + =' '; dom + =' just now '; dom + =' '; dom + =' '; // insert a temporary comment to the list $ ("# comment ") .append (dom);} if (data.status ==" failed ") {// alert (data.msg); layer.msg (data.msg);}}}); return false;}); (function () {/ * * Insert single sign-on JS * / var setHost = 'https://passport.elecfans.com'; // Set domain name var script = document.createElement ('script'); script.type = 'text / javascript'; script.src = setHost + '/public/pc/js/t.passport.js'; script.setAttribute ("id", "sso_script"); script.setAttribute ("data-ssoSite", setHost); script.setAttribute ("data-ssoReferer", encodeURIComponent (location.href)); script.setAttribute ("data-ssoSiteid", "11"); var body = document.getElementsByTagName ("body"). item ( 0); body.appendChild (script);}) () / * * It is recommended to modify the style of the article without a picture * * / $ (". Article .thumb"). Each (function () {if ($ (this). find ('img'). attr ('src') == "") {$ (this) .find ('img'). remove (); $ (this) .parent (). css ('padding-left ',' 0px ');}}); / * Baidu share * / window._bd_share_config = {common: {bdText: '', // Custom share content bdDesc: '', // Custom share summary bdUrl: window.location.href, // Custom share URL address bdPic: ''} , share: [{"bdSize": 60, "bdCustomStyle": true}]} with (document) 0 [(getElementsByTagName ('head') [0] || body) .appendChild (createElement ('script')). src = 'http://bdimg.share.baidu.com/static/api/js/share.js?cdnversion=' + ~ (-new Date () / 36e5)]; var add_url = '/ d / article / write / '; // var check_allow = "{: U (' Api / iscantalk ')}"; var check_allow = "/ d / api / iscantalk"; var click_items_length = $ ('. art_click_count '). length; if ( click_items_length> 0) {var id_str = ''; $ ('. art_click_count'). each (function () {id_str + = $ (this) .attr ('data-id') + ',';}) // var url = "{: U ('Api / getclickbyids')}"; var url = "/ d / api / getclickbyids"; var id_data = 'id_str =' + id_str; $ .ajax ({url: url, data: id_data, type: 'post', dataType: 'json', success: function (re) {if (re.list.length> = 1) {var list = re.list; for (var i in list) {var t emp_id = list [i] ['id']; var temp_span = $ (". art_click_count [data-id =" + temp_id + "]") temp_span.html (list [i] ['click']);}} }})} $ ("# comContent"). click (function () {if (now_uid == '') {$ .tActivityLogin (); return false;}}) $ (function () {var follow_wrap = $ ( ".author-collect"); var now_uid = "{$ _super ['uid']}"; var face_src = "{$ _super ['uface']}"; var getFollowNum = $ (". followNum strong"). html (); // Follow $ (window) .on ('click', '.author-collect', function () {if (now_uid == '') {$ .tActivityLogin (); return false;} if ( $ (this) .attr ('id') == 'follow') {$ .post ('/ d / user / follow', {tuid: article_user_id}, function (data) {// Data format returned: if (data.status == "successed") {$ (". followNum strong"). html (++ getFollowNum); follow_wrap.html ('followed'). attr ('id', 'cancelFollow'). css ( 'background', '# 999'); var follow_user = ' '; $ (' # follow_list '). append (follow_user);} if (data.status == "failed") {alert (data.msg);}});} else {// Unfollow if ($ ( this) .attr ('id') == 'cancelFollow') {$ .post ('/ d / user / cancelFollow', {tuid: article_user_id}, function (data) {// Data format returned: if (data .status == "successed") {follow_wrap.html ('Follow'). attr ('id', 'follow'). css ('background', '# f90'); $ (". followNum strong"). html (-getFollowNum); $ ('# follow_list .face'). each (function () {var target_uid = $ (this) .attr ('data-uid'); if (target_uid == now_uid) {$ ( this) .remove ();}})} if (data.status == "failed") {alert (data.msg);}}); return false;}}});});}); / * var myface = "{$ _super ['uid'] | avatar}"; var myname = "{$ _super ['username']}"; var article_id = {$ article ['id']}; var article_user_id = {$ article ['mid']}; // Article author ID $ (function () {<notempty name = "clearnum"> // Reduce the number of reminders var count = parseInt ($ ("# noticeCount"). html ()); count = count-{$ clearnum}; $ ("# noticeCount"). html (count); if ( count

Product Parameters


Description: Floating Bluetooth Speaker with Dazzling Light
Product dimension: Dia 155mm x H 45mm
Material: ABS+PC
Weight: 300g
LED Color: RGB+Warm White
LED Power: 0.5W
Speaker Power: 5W
Lamp Current: 15-20mA
LED Qty: 8pcs RGB lamp beads+4pcs Warm White lamp beads
Battery Capacity: 3.7V, 1000mA (Li battery included)
Protocol: Bluetooth 4.1-CSR
Color of product: Dark Grey 
Charging type: by a USB charger
Control Distance: 10m ( No obstacles)
Charging Time: 1.5 hours 
Continue Use Time: 3-5 hours 
Packing: Each in a color box
Waterproof Index: IP67
Warranty: 1 Year
Certification: CE (EMC,RED) ,ROHS, SCC, BQB,FCC
Suitable Occasions: Indoor and outdoor, can be used in the swimming pool as a Floating Speaker With Light
Color box  size: 18*20*5cm
G.W. of  Unit: 0.46kg
N.W. of Unit: 0.34kg



Introduction


We combine the Bluetooth speaker with RGBW Light, one switch easy control four lighting modes: warm white lighting mode, no lighting mode, dazzling lighting mode, RGB lighting mode. High-quality speaker with loud, clear sound, combine with color lighting, the plastic sticker can be detachable, waterproof index is IP67, used in the bedrooms, gardens, and swimming pools. 



The connection steps are very easy: turn on the speaker by pressing the button at the bottom, open the Bluetooth in the phone, wait for the Bluetooth to search the speaker, then connect successfully. 


Four modes of lighting can be selected by the button at the bottom. 

Mode 1: the warm white lighting mode with music, it can be used as a night lamp.

Mode 2: music without lighting mode, when under this mode, the initial light is blue, then the light will turn off, it can be used as a speaker only.

Mode 3: rhythemic lighting with music mode, when under this mode, the initial light is red, when play the music, colorful lighting can be dazzled with the music rhythem, it can be used as a party lighting.

Moed 4: music with colorful lighting automatic cycle mode, under this mode, the colorful lighting will change automatically, it can be used as a ambient lighting.

Bluetooth speaker (3)







Floating Speaker With Light

Floating Speaker With Light,Floating Pool Speakers With Lights,Floating Waterproof Speaker With Led Light,Floating Wireless Speaker With Light

Ningbo Homey Photoelectric Technology. Co., Ltd , https://www.linkuphome.com