{"id":3034,"date":"2017-06-06T00:00:00","date_gmt":"2017-06-05T22:00:00","guid":{"rendered":"http:\/\/www.amplificazionilombardi.it\/shop\/stereo-audio-optical-limiter-llc2\/"},"modified":"2026-03-12T17:55:15","modified_gmt":"2026-03-12T16:55:15","slug":"stereo-audio-optical-limiter-ll2c","status":"publish","type":"product","link":"https:\/\/www.amplificazionilombardi.it\/en\/shop\/stereo-audio-optical-limiter-ll2c\/","title":{"rendered":"LL2C STEREO OPTICAL AUDIO LIMITER \u2013 SOUND LIMITER FOR CLUBS"},"content":{"rendered":"<p data-start=\"1224\" data-end=\"1403\">The LL2C audio limiter has been designed to provide <strong data-start=\"1276\" data-end=\"1358\">high audio quality, operational safety and long-term stability of the settings<\/strong>, preventing any tampering after calibration.<\/p>\n<p data-start=\"1405\" data-end=\"1449\">The main adjustments of the unit, including:<\/p>\n<ul data-start=\"1451\" data-end=\"1506\">\n<li data-section-id=\"1b0vhbc\" data-start=\"1451\" data-end=\"1466\">\n<p data-start=\"1453\" data-end=\"1466\">input level<\/p>\n<\/li>\n<li data-section-id=\"sn7gwx\" data-start=\"1467\" data-end=\"1483\">\n<p data-start=\"1469\" data-end=\"1483\">output level<\/p>\n<\/li>\n<li data-section-id=\"1gx2zu\" data-start=\"1484\" data-end=\"1506\">\n<p data-start=\"1486\" data-end=\"1506\">limiting threshold<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1508\" data-end=\"1577\">are located <strong data-start=\"1520\" data-end=\"1541\">inside the device<\/strong> and adjusted via internal trimmers.<\/p>\n<p data-start=\"1579\" data-end=\"1713\">This design choice prevents accidental or intentional modifications to the settings once the system has been installed and calibrated.<\/p>\n<p data-start=\"1715\" data-end=\"1890\">All <strong data-start=\"1719\" data-end=\"1789\">audio connections through connectors are also made inside the unit<\/strong>, increasing installation security and preventing unauthorized modifications or bypass of the system.<\/p>\n<p data-start=\"1892\" data-end=\"2073\">If the unit is switched off using the power switch located on the rear panel, the audio signal is <strong data-start=\"1990\" data-end=\"2016\">completely interrupted<\/strong>, ensuring that <strong data-start=\"2032\" data-end=\"2072\">no bypass of the limiter is possible<\/strong>.<\/p>\n<p data-start=\"2075\" data-end=\"2328\">The level control is achieved through an <strong data-start=\"2116\" data-end=\"2148\">analog resistive optocoupler<\/strong>, without the use of VCA circuits.<br data-start=\"2182\" data-end=\"2185\" \/>This technical solution allows a <strong data-start=\"2218\" data-end=\"2277\">more natural, progressive and musical limiting behavior<\/strong>, minimizing audible artifacts in the audio signal.<\/p>\n<p data-start=\"2330\" data-end=\"2480\">Installed in a standard <strong data-start=\"2354\" data-end=\"2375\">19&#8243; rack \u2013 1 unit<\/strong>, the limiter is typically placed near equalizers and power amplifiers within professional audio systems.<\/p>\n<p data-start=\"2482\" data-end=\"2692\">Its smooth and progressive limiting response makes it ideal both for <strong data-start=\"2551\" data-end=\"2579\">protecting audio systems<\/strong> and for <strong data-start=\"2588\" data-end=\"2653\">sound level limitation in venues subject to noise regulations<\/strong>, while maintaining high audio quality.<\/p>\n<hr data-start=\"2694\" data-end=\"2697\" \/>\n<h1 data-section-id=\"1duzgra\" data-start=\"2699\" data-end=\"2721\">AVAILABLE VERSIONS<\/h1>\n<p data-start=\"2757\" data-end=\"2898\">The LL2C optical audio limiter is available in different configurations to suit various installation and sound level management requirements.<\/p>\n<p data-start=\"2900\" data-end=\"3091\">All versions share the same analog optical limiting circuit of the LL2C base model and maintain the same professional audio quality, but differ in the way the limiting thresholds are managed.<\/p>\n<hr data-start=\"3093\" data-end=\"3096\" \/>\n<h2 data-section-id=\"190wivg\" data-start=\"3098\" data-end=\"3139\">Version 1 \u2013 LL2C Standard (base model)<\/h2>\n<p data-start=\"3141\" data-end=\"3196\">This is the standard version of the LL2C audio limiter.<\/p>\n<p data-start=\"3198\" data-end=\"3332\">The unit features <strong data-start=\"3216\" data-end=\"3254\">one limiting threshold per channel<\/strong>, adjustable via internal trimmers during system installation and calibration.<\/p>\n<p data-start=\"3334\" data-end=\"3448\">Input level, output level and threshold adjustments are located <strong data-start=\"3398\" data-end=\"3417\">inside the unit<\/strong> in order to prevent tampering.<\/p>\n<p data-start=\"3450\" data-end=\"3546\">This configuration is ideal for installations where a <strong data-start=\"3504\" data-end=\"3533\">fixed maximum sound level<\/strong> is required.<\/p>\n<hr data-start=\"3548\" data-end=\"3551\" \/>\n<h2 data-section-id=\"1iq05t6\" data-start=\"3553\" data-end=\"3612\">Version 2 \u2013 LL2C with key-controlled threshold selection<\/h2>\n<p data-start=\"3614\" data-end=\"3712\">This version allows the configuration of <strong data-start=\"3655\" data-end=\"3711\">three different limiting thresholds for each channel<\/strong>.<\/p>\n<p data-start=\"3714\" data-end=\"3913\">The thresholds can be selected through a <strong data-start=\"3755\" data-end=\"3807\">mechanical key switch located on the front panel<\/strong>, allowing the venue manager to choose between different pre-configured sound levels set by the installer.<\/p>\n<p data-start=\"3915\" data-end=\"3984\">This solution is particularly useful where it is necessary to manage:<\/p>\n<ul data-start=\"3986\" data-end=\"4103\">\n<li data-section-id=\"1xc0alw\" data-start=\"3986\" data-end=\"4011\">\n<p data-start=\"3988\" data-end=\"4011\"><strong data-start=\"3988\" data-end=\"4011\">daytime sound level<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1jxzg6s\" data-start=\"4012\" data-end=\"4039\">\n<p data-start=\"4014\" data-end=\"4039\"><strong data-start=\"4014\" data-end=\"4039\">nighttime sound level<\/strong><\/p>\n<\/li>\n<li data-section-id=\"11tnten\" data-start=\"4040\" data-end=\"4103\">\n<p data-start=\"4042\" data-end=\"4103\"><strong data-start=\"4042\" data-end=\"4103\">temporary higher level for authorized acoustic exemptions<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4105\" data-end=\"4219\">The three thresholds are calibrated during system setup and can then be selected using the front panel key switch.<\/p>\n<hr data-start=\"4221\" data-end=\"4224\" \/>\n<h2 data-section-id=\"1vowfxv\" data-start=\"4226\" data-end=\"4276\">Version 3 \u2013 LL2C with web controller management<\/h2>\n<p data-start=\"4278\" data-end=\"4414\">This version includes a <strong data-start=\"4302\" data-end=\"4344\">web-based controller with Wi-Fi access<\/strong>, allowing remote configuration and management of the limiting levels.<\/p>\n<p data-start=\"4416\" data-end=\"4434\">The system allows:<\/p>\n<ul data-start=\"4436\" data-end=\"4658\">\n<li data-section-id=\"1ybrzuq\" data-start=\"4436\" data-end=\"4492\">\n<p data-start=\"4438\" data-end=\"4492\">automatic management of <strong data-start=\"4462\" data-end=\"4492\">day and night sound levels<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1t42680\" data-start=\"4493\" data-end=\"4536\">\n<p data-start=\"4495\" data-end=\"4536\">configuration of <strong data-start=\"4512\" data-end=\"4536\">temporary exemptions<\/strong><\/p>\n<\/li>\n<li data-section-id=\"wldk4j\" data-start=\"4537\" data-end=\"4594\">\n<p data-start=\"4539\" data-end=\"4594\">scheduling of permitted levels using a <strong data-start=\"4578\" data-end=\"4594\">web calendar<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1g60cvk\" data-start=\"4595\" data-end=\"4658\">\n<p data-start=\"4597\" data-end=\"4658\">generation of a <strong data-start=\"4613\" data-end=\"4658\">history log of all changes and operations<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4660\" data-end=\"4692\">Two user profiles are available:<\/p>\n<p data-start=\"4694\" data-end=\"4795\"><strong data-start=\"4694\" data-end=\"4719\">Administrator profile<\/strong><br data-start=\"4719\" data-end=\"4722\" \/>managed by the installer, with full configuration and programming access.<\/p>\n<p data-start=\"4797\" data-end=\"4899\"><strong data-start=\"4797\" data-end=\"4813\">User profile<\/strong><br data-start=\"4813\" data-end=\"4816\" \/>intended for the venue manager, allowing data viewing and authorized level control.<\/p>\n<p data-start=\"4901\" data-end=\"5037\">This solution is particularly suitable for installations requiring <strong data-start=\"4968\" data-end=\"5036\">automated sound level management and traceability of adjustments<\/strong>.<\/p>\n<hr data-start=\"5039\" data-end=\"5042\" \/>\n<h2 data-section-id=\"1xnomrt\" data-start=\"5044\" data-end=\"5098\">Version 4 \u2013 LL2C with web controller and key switch<\/h2>\n<p data-start=\"5100\" data-end=\"5210\">This version combines the <strong data-start=\"5126\" data-end=\"5155\">web controller management<\/strong> with the <strong data-start=\"5165\" data-end=\"5209\">mechanical key switch on the front panel<\/strong>.<\/p>\n<p data-start=\"5212\" data-end=\"5249\">The limiter can therefore be managed:<\/p>\n<ul data-start=\"5251\" data-end=\"5310\">\n<li data-section-id=\"1yafvnj\" data-start=\"5251\" data-end=\"5276\">\n<p data-start=\"5253\" data-end=\"5276\">via <strong data-start=\"5257\" data-end=\"5276\">web programming<\/strong><\/p>\n<\/li>\n<li data-section-id=\"1dzht7q\" data-start=\"5277\" data-end=\"5310\">\n<p data-start=\"5279\" data-end=\"5310\">or via <strong data-start=\"5286\" data-end=\"5310\">manual key selection<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5312\" data-end=\"5426\">providing maximum flexibility in installations where both remote management and local manual control are required.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p data-start=\"305\" data-end=\"440\">LL2C is a <strong data-start=\"315\" data-end=\"360\">professional stereo optical audio limiter<\/strong> designed to control sound levels while preserving maximum audio signal quality.<\/p>\n<p data-start=\"442\" data-end=\"674\">Thanks to its fully analog circuitry and the control system based on a <strong data-start=\"513\" data-end=\"538\">resistive optocoupler<\/strong>, the limiter provides <strong data-start=\"561\" data-end=\"618\">smooth, progressive and almost imperceptible limiting<\/strong>, preserving the natural character of the audio program.<\/p>\n<p data-start=\"676\" data-end=\"879\">Unlike many conventional limiters based on VCA or digital processing, LL2C uses a <strong data-start=\"758\" data-end=\"796\">fully analog signal control system<\/strong>, ensuring a more musical and transparent response even when the limiter is active.<\/p>\n<p data-start=\"881\" data-end=\"1157\">The modern electronic design, the use of <strong data-start=\"922\" data-end=\"955\">selected low-noise components<\/strong>, and the careful quality control of the assembly process provide the LL2C limiter with <strong data-start=\"1043\" data-end=\"1105\">high reliability, stability and superior audio performance<\/strong>, making it suitable for professional installations.<\/p>\n","protected":false},"featured_media":6787,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[137],"product_tag":[],"class_list":{"0":"post-3034","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-limiters","8":"first","9":"instock","10":"sale","11":"taxable","12":"shipping-taxable","13":"purchasable","14":"product-type-variable"},"acf":[],"_links":{"self":[{"href":"https:\/\/www.amplificazionilombardi.it\/en\/wp-json\/wp\/v2\/product\/3034","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.amplificazionilombardi.it\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.amplificazionilombardi.it\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.amplificazionilombardi.it\/en\/wp-json\/wp\/v2\/media\/6787"}],"wp:attachment":[{"href":"https:\/\/www.amplificazionilombardi.it\/en\/wp-json\/wp\/v2\/media?parent=3034"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.amplificazionilombardi.it\/en\/wp-json\/wp\/v2\/product_brand?post=3034"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.amplificazionilombardi.it\/en\/wp-json\/wp\/v2\/product_cat?post=3034"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.amplificazionilombardi.it\/en\/wp-json\/wp\/v2\/product_tag?post=3034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}