{"product_id":"sonifex-cm-hpr1-headphone-volume-control","title":"Sonifex CM-HPR1 | Headphone Volume Control","description":"\u003cp\u003eThis product allows the connection of a stereo balanced line input via a RJ45 with StudioHub+™ pinout and creates a headphone output, with level control. It is transformer balanced, and can be used with any headphones above 150Ω impedance. The transformer ratio of 2:1 ensures that any headphone load presented at the output is reflected through to the input at a 1:4 ratio (hence a 150Ω set of headphones looks like 600Ω at the input, a suitable load for most good quality line output stages). The stereo headphone output uses a stereo 6.35mm jack socket with the following connections:\u003c\/p\u003e\u003ch3\u003eProduct Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eStereo line level RJ45 (StudioHub+™ pin-out).\u003c\/li\u003e\n\u003cli\u003eHeadphone output with level control.\u003c\/li\u003e\n\u003cli\u003eFor headphones above 150Ω impedance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cp\u003eCreates a connection of a stereo balanced line input via a RJ45 with StudioHub+™ pinout and provides a headphone output, with level control.\u003c\/p\u003e\u003ch3\u003eProduct Category\u003c\/h3\u003e\u003cp\u003ePassive Controllers\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ch4\u003eAudio Specification\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput\/Output Level Ratio:\u003c\/strong\u003e 02:01\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput\/Output Impedance Ratio:\u003c\/strong\u003e 04:01\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Headphone Impedance:\u003c\/strong\u003e 150Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Input Level:\u003c\/strong\u003e +28dBu\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Output Level:\u003c\/strong\u003e +22dBu\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 20Hz to 20kHz, +0\/-0.5dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise:\u003c\/strong\u003e \u0026lt;-115dBu A-wgtd\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistortion Ref +8dBu (Output):\u003c\/strong\u003e \u0026lt;0.01%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon Mode Rejection:\u003c\/strong\u003e \u0026gt;80dB\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eConnections\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain Stereo Input:\u003c\/strong\u003e 1 x RJ45 female StudioHub+™ pinout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e ¼” (6.35mm) A\/B gauge 3-pole stereo jack sockets\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eEquipment Type\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eCM-HPR1:\u003c\/strong\u003e Headphone volume control, RJ45 input\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003ePhysical Specification\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (Raw):\u003c\/strong\u003e 7.7cm (W) x 8.3cm (D) x 4.2cm (H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (Raw):\u003c\/strong\u003e 3.0” (W) x 3.3” (D) x 1.7” (H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Nett: 0.22kg Gross: 0.33kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Nett: 0.49lbs Gross: 0.73lbs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSupport and Downloads\u003c\/h3\u003e\u003ch4\u003eHandbooks \u0026amp; Guides\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/ad56550c.delivery.rocketcdn.me\/wp-content\/uploads\/products\/CM-HPR1\/cm-hpr1_cm-hpx1_hb.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCM-HPR1 Handbook\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eBrochures\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/brochures-guides\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eClick to visit the brochures page.\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eDeclarations\u003c\/h4\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/support\/ce-ukca-declarations\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eClick to visit the declarations page.\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eRelated Products\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/product\/cm-hpx1\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCM-HPX1 Headphone Volume Control\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/product\/cm-mnt1\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eCM-MNT1 Desk Mount Panel\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOfficial Links\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\u003ca href=\"https:\/\/sonifex.co.uk\/product\/cm-hpr1\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOfficial Product Page\u003c\/a\u003e\u003c\/li\u003e\u003c\/ul\u003e","brand":"Sonifex","offers":[{"title":"Default Title","offer_id":53670247891285,"sku":"CM-HPR1","price":265.87,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1033\/6993\/3141\/files\/Sonifex_Sonifex_CM_HPR1_Headphone_Volume_Control_01_2abc1352-7a23-4ce6-ae82-eb94ecf0987a.jpg?v=1780656563","url":"https:\/\/tvpro.lt\/products\/sonifex-cm-hpr1-headphone-volume-control","provider":"tvpro.lt – Broadcast \u0026 Pro Video Equipment Online Store","version":"1.0","type":"link"}