{"id":1911,"date":"2019-04-15T15:36:27","date_gmt":"2019-04-15T12:36:27","guid":{"rendered":"http:\/\/racov.ro\/?p=1911"},"modified":"2019-04-15T15:36:27","modified_gmt":"2019-04-15T12:36:27","slug":"stereo-de-masina-din-china-analiza-si-pareri","status":"publish","type":"post","link":"https:\/\/racov.ro\/index.php\/2019\/04\/15\/stereo-de-masina-din-china-analiza-si-pareri\/","title":{"rendered":"Stereo de ma\u0219in\u0103 din China &#8211; analiz\u0103 \u0219i p\u0103reri"},"content":{"rendered":"<p>Am cump\u0103rat acest <em><a href=\"https:\/\/www.aliexpress.com\/item\/autoradio-1-din-car-radio-JSD-520-car-stereo-bluetooth-audio-mp3-recorder-usb-sd-aux\/32925916673.html?spm=a2g0s.9042311.0.0.24044c4dF1Fyz2\" target=\"_blank\" rel=\"noopener\"><strong>car stereo<\/strong><\/a> &#8211;<\/em>\u00a0limba rom\u00e2n\u0103 e cam s\u0103rac\u0103 \u00een denumiri a\u0219a de specifice \u0219i moderne &#8211; <strong><em>casetofon de ma\u0219in\u0103<\/em><\/strong>\u00a0era numele tradi\u021bional, numai c\u0103 nu are casetofon, nici CD.<br \/>\nDoar Radio, Aux in, USB, SD-card, Bluetooth, HandsFree. Telecomand\u0103, 4x60W\u00a0\ud83d\ude06 \ud83d\ude06 ,display bestial &#8230;<\/p>\n<p><a href=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/40\/ba\/81\/40ba81399078bc6bfc84dbf6bbf1e5d9.jpg?ssl=1\" target=\"_blank\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/40\/ba\/81\/40ba81399078bc6bfc84dbf6bbf1e5d9.jpg?resize=840%2C660&#038;ssl=1\" alt=\"\" width=\"840\" height=\"660\" \/><\/a><\/p>\n<p>Cost\u0103 doar 12$, m\u0103 rog, 13 cu livrare. Zici c\u0103 e furat, la banii \u0103\u0219tia.<br \/>\nScopul lui este s\u0103 stea pe un raft \u00een magazie \u0219i s\u0103-mi c\u00e2nte.<\/p>\n<p>Pentru cei gr\u0103bi\u021bi, care nu au <del>chef<\/del>\u00a0timp s\u0103 citeasc\u0103 tot, p\u0103rerea mea pe scurt \u0219i motivele alegerii:<br \/>\n+ PRO<br \/>\nPre\u021b foarte mic<br \/>\nCalitate bun\u0103 a sunetului<br \/>\nDimensiuni mici<br \/>\nFoarte capabil (inclusiv Bluetooth handsfree)<br \/>\nPutere destul\u0103 la 4x25W. Boxe de magazie s\u0103 ai \ud83d\ude42<br \/>\n&#8230;mai are \u0219i telecomand\u0103<br \/>\n&#8211; CONS<br \/>\nNu are RDS\u00a0\ud83d\ude25<br \/>\nLizibilitate destul de proast\u0103 a ecranului<br \/>\nMai trebuie o surs\u0103 de alimentare, gen 12V-5A<\/p>\n<p>Mai jos, testele \u0219i interven\u021biile la care a fost supus.<br \/>\n<iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/eNCLBhOBGiw?rel=0\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><span data-mce-type=\"bookmark\" style=\"display: inline-block; width: 0px; overflow: hidden; line-height: 0;\" class=\"mce_SELRES_start\">\ufeff<\/span><\/iframe><\/p>\n<p>\u00cen completarea filmului, fiindc\u0103 aici e destul loc s\u0103 m\u0103 desf\u0103\u0219or, c\u00e2teva preciz\u0103ri.<br \/>\n1.<strong> Flat flex cable<\/strong> \ud83d\udc7f . A cedat c\u00e2nd am reasamblat aparatul. Nu mai f\u0103cea bine contact \u00een panoul frontal, a\u0219a c\u0103 radioul ba nu se aprindea, ba nu se auzea. Dup\u0103 mai multe tentative e\u0219uate de resuscitare, m-am chinuit \u0219i am lipit cu delicate\u021be un cablu plat, model de harddisk vechi IDE \ud83d\ude09 .<br \/>\n<a href=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/21\/2b\/aa\/212baa2410475ab92e29af68f80e5c2a.jpg?ssl=1\" target=\"_blank\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/21\/2b\/aa\/212baa2410475ab92e29af68f80e5c2a.jpg?resize=840%2C473&#038;ssl=1\" alt=\"\" width=\"840\" height=\"473\" \/><\/a><\/p>\n<p>2. <strong>Testul audio.<\/strong>\u00a0Am f\u0103cut scena din imagine<br \/>\n<a href=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/cd\/25\/17\/cd25173df56dfa65e26c903da9a0821c.jpg?ssl=1\" target=\"_blank\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/cd\/25\/17\/cd25173df56dfa65e26c903da9a0821c.jpg?resize=840%2C473&#038;ssl=1\" alt=\"\" width=\"840\" height=\"473\" \/><\/a><br \/>\ncu programul <a href=\"https:\/\/www.audacityteam.org\/\" target=\"_blank\" rel=\"noopener\"><strong>Audacity<\/strong><\/a>, microfon <a href=\"https:\/\/www.audio-technica.com\/cms\/wired_mics\/5879a6ca22e5aa7e\/index.html\" target=\"_blank\" rel=\"noopener\"><strong>Audio-technica 2020 USB+<\/strong><\/a>, car-stereo-China, microsistem <a href=\"https:\/\/www.sony.com\/electronics\/support\/audio-systems-cmt-series\/cmt-nez3\" target=\"_blank\" rel=\"noopener\"><strong>Sony CMT-NEZ3<\/strong><\/a>, boxe de raft <a href=\"http:\/\/racov.ro\/index.php\/2016\/12\/30\/boxe-de-raft\/\" target=\"_blank\" rel=\"noopener\"><strong>Wharfedale Diamond 220<\/strong><\/a>.<\/p>\n<p>O box\u0103 e conectat\u0103 la China, una la Sony.<br \/>\nDin telefon injectez pe Aux piesa <a href=\"https:\/\/www.youtube.com\/watch?v=mrgVpZhjOWk\" target=\"_blank\" rel=\"noopener\">Powerup <\/a>succesiv la fiecare aparat.<br \/>\nReglez volumul la fiecare, astfel \u00eenc\u00e2t atunci c\u00e2nd microfonul capteaz\u0103 \u0219i unda apare pe ecran, s\u0103 ajung\u0103 cu greu \u00een <em><strong>0 dB<\/strong><\/em>.<\/p>\n<p>Mai jos e o por\u021biune din aceea\u0219i secven\u021b\u0103, pe 3 canale. Sony, China \u0219i original.<br \/>\nCompara\u021bia corect\u0103 se face \u00eentre primele dou\u0103. Mostra original\u0103 e analizat\u0103 direct digital, f\u0103r\u0103 s\u0103 fie redat\u0103 analogic \u00een niciun fel, spre deosebire de celelalte dou\u0103.<br \/>\n<a href=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/cf\/ec\/37\/cfec376aa7321f19985670a5af054f25.jpg?ssl=1\" target=\"_blank\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/cf\/ec\/37\/cfec376aa7321f19985670a5af054f25.jpg?resize=840%2C392&#038;ssl=1\" alt=\"\" width=\"840\" height=\"392\" \/><\/a><\/p>\n<p>M-am jucat cu reglajele (bas, \u00eenalte), astfel \u00eenc\u00e2t s\u0103 sune c\u00e2t de asem\u0103n\u0103tor posibil. Se vede c\u0103 originalul are o dinamic\u0103 mai mare (diferen\u021ba \u00eentre amplitudinile mici \u0219i mari e mai accentuat\u0103), dar s\u0103 nu neglij\u0103m faptul c\u0103 primele sunt redate din telefon, scoase pe boxe, captate de microfon \u0219i <em><strong>apoi<\/strong> <\/em>analizate \ud83d\ude44 .<\/p>\n<p>Analiza spectral\u0103<br \/>\n<a href=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/44\/42\/40\/444240322f8b51fa6a0cf5815d403433.jpg?ssl=1\" target=\"_blank\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/44\/42\/40\/444240322f8b51fa6a0cf5815d403433.jpg?resize=840%2C397&#038;ssl=1\" alt=\"\" width=\"840\" height=\"397\" \/><\/a><\/p>\n<p>Este aceea\u0219i secven\u021b\u0103 ca mai sus, dar nu 2D, amplitudine \u0219i timp, ci \u00een 3D, frecven\u021b\u0103 \u0219i timp. A treia dimensiune este amplitudinea-str\u0103lucirea. Cu c\u00e2t e mai str\u0103lucitoare culoarea, cu at\u00e2t mai mare amplitudinea.<br \/>\nPrimele dou\u0103 mostre, Sony \u0219i China sunt foarte asem\u0103n\u0103toare, cu basul accentuat \u0219i \u00eenaltele cam sc\u0103zute (banda de jos e mult mai alb\u0103-str\u0103lucitoare-amplitudine mare). Asta se poate datora multor factori. A\u0219a a redat telefonul, a\u0219a au redat boxele, a\u0219a a captat microfonul, sau o combina\u021bie din toate. Sau a\u0219a am f\u0103cut eu reglajele, c\u0103 nu le-am l\u0103sat pe zero.<br \/>\nMostra original\u0103 este iar mai dinamic\u0103, cu benzi bine delimitate, pentru c\u0103&#8230; nu m\u0103 mai repet.<\/p>\n<p>3. <strong>Puterea<\/strong>.<br \/>\n<a href=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/8d\/e0\/06\/8de006f472f900cd8701540b14ff7e67.png?ssl=1\" target=\"_blank\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/8d\/e0\/06\/8de006f472f900cd8701540b14ff7e67.png?resize=840%2C473&#038;ssl=1\" alt=\"\" width=\"840\" height=\"473\" \/><\/a><\/p>\n<p>Cu bancul de test din imaginea al\u0103turat\u0103 am f\u0103cut urm\u0103toarele:<br \/>\nSursa de 12V este o surs\u0103 de calculator de 400W, care ar trebui s\u0103 livreze 15A pe 12V. O sarcin\u0103 rezistiv\u0103 de 4-8\u03a9 (comutatorul a r\u0103mas blocat pe 8\u03a9\u00a0 \ud83d\ude33 )<br \/>\n<a href=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/c9\/90\/da\/c990da56836ecfb38d72199fdf6c63bd.jpg?ssl=1\" target=\"_blank\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/c9\/90\/da\/c990da56836ecfb38d72199fdf6c63bd.jpg?resize=840%2C473&#038;ssl=1\" alt=\"\" width=\"840\" height=\"473\" \/><\/a><\/p>\n<ul>\n<li>Micul aparat cu display e o surs\u0103 reglabil\u0103 extraordinar\u0103,<a href=\"https:\/\/www.aliexpress.com\/item\/RD-DPS3005-Constant-Voltage-current-Step-down-Programmable-Power-Supply-module-buck-Voltage-converter-color-LCD\/32684316119.html?spm=a2g0s.9042311.0.0.27424c4dX7DQZ8\" target=\"_blank\" rel=\"noopener\"> tot din&#8230;<\/a><br \/>\n&#8211; uite a\u0219a, s\u0103 te enervez pu\u021bin&#8230;<br \/>\n<span style=\"font-size: 10pt;\"><strong data-spm-anchor-id=\"2114.10010108.1000023.i0.430e1775QPlLxT\">Technical parameters<br \/>\n<\/strong>Input voltage range:\u00a0\u00a06.00-40V<\/span><br \/>\n<span style=\"font-size: 10pt;\">Output voltage range:\u00a0\u00a00V-32V<\/span><br \/>\n<span style=\"font-size: 10pt;\">Output current:\u00a00-5A<\/span><br \/>\n<span style=\"font-size: 10pt;\">Output power range: 0-160W\u00a0\u00a0\u00a0<\/span><br \/>\n<span style=\"font-size: 10pt;\">Product Weight: about 113g\u00a0 \u00a0 \u00a0 \u00a0Product Dimension: 79*43*48(mm)<\/span><br \/>\n<span style=\"font-size: 10pt;\">Output voltage resolution: 0.01V<\/span><br \/>\n<span style=\"font-size: 10pt;\">Output Voltage accuracy: \u00b1 (0.5% + 3 digits)<\/span><br \/>\n<span style=\"font-size: 10pt;\">Output current resolution: 0.001A<\/span><br \/>\n<span style=\"font-size: 10pt;\">Output Current accuracy: \u00b1 (0.5% + 5 digit)<\/span><\/li>\n<\/ul>\n<p>Sunetul a fost injectat pe Aux, din telefon, alt\u0103 surs\u0103 de semnal nu am, dar e pe list\u0103.<br \/>\n<img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/f2\/83\/f6\/f283f67e944d01b394c2bfbbf2e8d324.jpg?resize=196%2C403&#038;ssl=1\" width=\"196\" height=\"403\" \/>1000Hz &#8211; standard, la 75% din volumul telefonului.<br \/>\nAplica\u021bia este aceasta<br \/>\n<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.boedec.hoel.frequencygenerator&amp;hl=ro\" target=\"_blank\" rel=\"noopener\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/i0.wp.com\/i.pinimg.com\/originals\/af\/40\/69\/af4069d92b231134ae06603e3b8a6449.jpg?resize=728%2C581&#038;ssl=1\" alt=\"\" width=\"728\" height=\"581\" \/><\/a><\/p>\n<p><span style=\"text-decoration: underline;\">Cam astea sunt rezultatele:<\/span><br \/>\n&#8211; curent consumat \u00een <em>standby<\/em> (oprit &#8211; doar ceas pe ecran) &#8211; 24mA<br \/>\n&#8211; putere consumat\u0103 la un volum de audi\u021bie normal\u0103 (pu\u021bin sub jumate) &#8211; 3,8W<br \/>\n&#8211; putere consumat\u0103 la maxim, 2 canale pe o sarcin\u0103 de 8\u03a9 &#8211; 28,6W<br \/>\nAsta e \u00een conformitate cu specifica\u021biile amplificatorului final<br \/>\n4x26W\/4\u03a9 = 104W\u00a0 <span style=\"font-size: 14pt;\">\u21d2<\/span>\u00a0 2x13W\/8\u03a9 = 26W<br \/>\n&#8211; c\u0103derea de tensiune care se vede \u00een film la putere maxim\u0103, este cel mai probabil dat\u0103 de c\u0103derea pe fire, care nu sunt foarte groase. O s\u0103 mai testez, dar totu\u0219i&#8230; sunt doar 2 amperi, pe surs\u0103 scrie maxim 15!!!<\/p>\n<p>A\u0219a cum am mai spus,<br \/>\n<span style=\"font-size: 14pt;\"><strong>Scopul lui este s\u0103 stea pe un raft \u00een magazie \u0219i s\u0103-mi c\u00e2nte.<\/strong><\/span><br \/>\nMai trebuie s\u0103 produc o surs\u0103 de 13V-5A, s\u0103 resuscitez cele 2 perechi de boxe colec\u021bionate \ud83d\ude08 mai \u0219tie de pe unde (4 canale baby)&#8230; \u0218tiam eu c\u0103 o s\u0103-mi trebuiasc\u0103 odat\u0103.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Am cump\u0103rat acest car stereo &#8211;\u00a0limba rom\u00e2n\u0103 e cam s\u0103rac\u0103 \u00een denumiri a\u0219a de specifice \u0219i moderne &#8211; casetofon de<\/p>\n","protected":false},"author":1,"featured_media":1912,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[3],"tags":[],"class_list":["post-1911","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-3"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/racov.ro\/wp-content\/uploads\/2019\/04\/vlcsnap-2019-04-15-09h19m55s720.png?fit=700%2C350&ssl=1","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p75FkB-uP","jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/posts\/1911","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/comments?post=1911"}],"version-history":[{"count":11,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/posts\/1911\/revisions"}],"predecessor-version":[{"id":1924,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/posts\/1911\/revisions\/1924"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/media\/1912"}],"wp:attachment":[{"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/media?parent=1911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/categories?post=1911"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/racov.ro\/index.php\/wp-json\/wp\/v2\/tags?post=1911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}