On the combination of integrated operational amplifier and integrated successful amplifier

On the combination of integrated operational amplifier and integrated successful amplifier

Integrated op amps and integrated amplifiers are the two favorite types of devices for beginner enthusiasts and student enthusiasts. They have many varieties, different performances, and different sound quality and timbre. How to match and combine the above two types of devices in order to make the best use of their respective advantages, give full play to their respective advantages, and create the best performance-price ratio is a question worthy of discussion.
Although the author has accumulated some experience in the fever course for several years, he also stocks a considerable number of audio devices. Among them, there are many integrated op amps and integrated amplifiers, including the early fever op amps LM833N, NE5532N, NE5535N and the recently popular OP275G, LT1057, AD827JN. Jishangfang is some very well-known models, such as TDA1514A, LM1875T, LM1876TF, LM3886TF and the early TA2030A. Of course, the integrated blocks such as JRC4558P, TL072 and TDA2030, because their performance is not yet "fever" level, there is no need to come up with research.
The above-mentioned collections are all ready-made finished boards. The components and craftsmanship on the boards are still more elaborate and very simple. For the above-mentioned several op amps, because they are standard dual op amps, only one pre-buffer amplifier board is used, which is the one used for AD827 in "Fine Item 1876" in "Electronic Newspaper" on June 13, 1999. . The components are very sophisticated: DALE W gold film resistors, WIMA, ELNA capacitors, APLS potentiometers, silver-plated double-panel, the process is also very sophisticated. The author removed the AD827 and replaced it with a 24K gold-plated op amp socket.
As for the power supply, the op amp is powered by a servo power supply of ± 15V, and the power amplifier uses the power supply method of large ring cattle, double bridge rectification, large ponds and small ponds in turn.
The author also invited several like-minded fans to comment together. The listening time is still selected after 7pm, the purpose is to have a better environment. The equipment used is Xiaxin's third-generation DVD8058A and Hivi Dushi 2? 1C, and the software is still familiar with saxophone, Cai Qin old song, Hugo I and so on.
I love 1876, let it take the lead and replace it with the aforementioned six op amps. Of course, the 827 + 1876 combination I used before has the best listening experience, and has won unanimous praise. This matching mid-high frequency has a strong musical taste, smooth, balanced, natural, warm, intoxicating, and the low frequency is clean and neat, and it is free to relax. The combination of OP275 + 1876 is slightly worse in the sense of high frequency extension, the low frequency is slightly blurred, and the intermediate frequency is still excellent. The overall feeling is slightly lost to AD827, which is the first choice for cost performance. Although the LT1057 is a big name, it is not suitable for 1876. The problem lies in the tone, which always gives people a "cold" and "thin" feeling. The LM833 is similar to the NE5532, with a warm tone, but a strong high-frequency glitch, and the low frequency can't hold the tail. The noise of the 5532 is slightly larger. As for the NE5535, there was a serious distortion in the channel after it was replaced, and it was estimated that it was damaged. Then it exited the comparison. In summary, for the LM1876 amplifier, the AD827 can achieve the highest performance, while the OP275 has a high cost performance.
Next, we put on the LM3886, and it feels very similar to the 1876, and it has more power. It still feels better with AD827. OP275, NE5532, LM833 are not much different after use, but OP275 low frequency is better, which may be related to its 22V / ms conversion rate. LT1057 still reflects the characteristics of heavy metal taste, this combination makes people feel that it is good for home theater, dynamic and ambitious. In particular, the paragraph of [Kiev Gate] of "Picture Exhibition" in "Hugo I" is very magnificent.
On the LM1875's prestigious power amplifier, the AD827 is not very prominent, and the LT1057 is shocking. The overall balance, the sound is moderate, the high and low frequencies are rich, and the music details are handled properly, especially in Kenny · G Saxophone "Spring Breeze". Background music triangle iron accompaniment, especially clear and pleasing to the ear. NE5532 works well with OP275 1875. Especially 5532, which can be described as cheap and good quality, it has the same conversion rate as 1875, there is no "bottleneck" problem of speed, everything is used, it is worth recommending, LM833 is slightly worse.
For the 1514A, because it is a "cold and colorful" type power amplifier, it is difficult to get along with the LT1057. AD827 and OP275 are better in several other op amps. NE5532 and LM833 can also be matched with it, but the intermediate frequency is always unsatisfactory. Comprehensive consideration, 1514A, OP275 may be the first choice, although there are no outstanding points, but quite satisfactory.
Although the last appearance of TDA2030A is already a yellow flower yesterday, it has a large amount in the society, and it is still used in a considerable part of computer active speakers. Our suggestion can be used as a reference for motorcycles of 2030A users. We recommend using NE5532 or LM833, they are enough with 2030A, there is no need to pursue the other three. From the sense of hearing, the difference is minimal.

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

'+ 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 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

Inversion AC Power Supply

Ac Power Source,1000Hz Ac Power Supply,400Hz Ac Power Supply,Regulated Ac Power Supply

Yangzhou IdealTek Electronics Co., Ltd. , https://www.idealtekpower.com