{"product_id":"dc-block","title":"DC•BLOCK \u0026 LP•FILTER for Coax DACs","description":"\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eDC•BLOCK is an in-line device that is located right at the DACs coaxial signal input. It's\u003c\/span\u003e a 2nd order Butterworth filter integrated in a BNC adapter that blocks DC leakage and filters RF noise below 1Mhz. \u003cspan data-mce-fragment=\"1\"\u003eDC (and \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003elow frequency AC) may be \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003ecaused by symbol correlated fluctuations in the signal, degradation of the source blocking capacitor, transfer of energy along the dielectric or \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eEMF from \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eproximate components inducing currents in the coax cable itself. (The latter is a reminder to keep coax cables ultra short and well shielded).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eLP•FILTER is an in-line BNC adapter device that contains a RLC low pass filter with a 100MHz cut-off frequency. It can be coupled in series with DC•BLOCK or located at the source output.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe combination of DC•BLOCK and LP•FILTER is highly recommended as a cost-effective way to get a noticeable improvement in transparency. Zero unwanted current flow and reduced RF noise outside the S\/PDIF passband will help DACs sound better. For an even more dramatic improvement, consider the addition of \u003ca href=\"https:\/\/audiowise-canada.myshopify.com\/products\/opto_dx\" data-mce-fragment=\"1\" target=\"_blank\"\u003eOPTO•DX\u003c\/a\u003e which adds optical galvanic isolation from the source plus improved RF noise attenuation. For truly remarkable transparency, add \u003ca href=\"https:\/\/audiowise-canada.myshopify.com\/collections\/rf-stop-and-accessories\/products\/rf-stop-extreme-signal-filter\" data-mce-fragment=\"1\" target=\"_blank\"\u003eRF•STOP EXTREME SE Signal Filter\u003c\/a\u003e which extends filtering from 100Mhz to well beyond 1Ghz. \u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1552\/8145\/files\/DC-BLOCKMeasurements_2.jpg?v=1699214961\"\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eRefer to the connection drawings below. \u003cspan style=\"text-decoration: underline;\"\u003eOrder two DC•BLOCK+ LP•FILTER for dual-coax connections\u003c\/span\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 42.1881%;\"\u003eSource Coax to DAC:\u003c\/td\u003e\n\u003ctd style=\"width: 55.0596%;\"\u003e\u003cspan\u003eRecommend DC•BLOCK. Add LP•FILTER if your source is noisy \u003cem\u003e-or-\u003c\/em\u003e if you want to ensure maximum filtering.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 42.1881%;\"\u003e\u003cspan\u003eSRC•DX to DAC:\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 55.0596%;\"\u003e\u003cspan\u003eRecommend DC•BLOCK. Add LP•FILTER if your source is noisy \u003cem\u003e-or-\u003c\/em\u003e if your USB is not well isolated \u003cem\u003e-or-\u003c\/em\u003e if you want to ensure maximum filtering.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 42.1881%;\"\u003e\u003cspan\u003eOPTO•DX to DAC:\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 55.0596%;\"\u003e\u003cspan\u003eRecommend DC•BLOCK. Add LP•FILTER if you want to ensure maximum filtering. OPTO•DX optical modulation is a low-pass filter.\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1552\/8145\/products\/DACwithGND-ZRO_1.jpg?v=1658778762\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"AudioWise","offers":[{"title":"DC•BLOCK + LP•FILTER","offer_id":44774862323754,"sku":null,"price":245.0,"currency_code":"USD","in_stock":true},{"title":"DC•BLOCK Only","offer_id":44774862356522,"sku":null,"price":125.0,"currency_code":"USD","in_stock":true},{"title":"LP•FILTER Only","offer_id":44774862389290,"sku":null,"price":125.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/2732\/4458\/files\/IMG_4020_f.png?v=1788319129","url":"https:\/\/extremeoutfitterspro.com\/products\/dc-block","provider":"My Store","version":"1.0","type":"link"}