{"product_id":"adastra-v36-vr-100v-volume-control-with-24v-relay","title":"Adastra V36-VR 100V Volume Control with 24V Relay","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Adastra V36-VR is a 100V line volume control (attenuator) rated at 36W, built for commercial background music and public address systems. It adjusts speaker output across 10 steps, with eight 3dB steps and two 6dB steps, so you can set levels room by room without touching the amplifier. The unit comes complete with a plastic surface mount back box, an ABS faceplate and a matching plastic knob, so it is ready to fit straight out of the packaging.\u003c\/p\u003e\n\u003cp\u003eThe key feature here is the 24V relay. When triggered from a fire alarm panel, the relay bypasses the attenuator and returns the speaker to full volume. This makes sure emergency announcements are heard clearly, even if someone has turned the local level right down. The relay is rated at 24V, 50mA, which suits most standard alarm interface outputs. If you are wiring these into a life safety setup, the bypass function does the work for you rather than relying on staff to adjust anything manually.\u003c\/p\u003e\n\u003cp\u003eFrequency response runs from 35Hz to 20kHz, so it handles both speech and music across the audible range. The assembled unit measures 85 x 85 x 75mm including the back box, with a 47mm mounting depth, which keeps the surface footprint tidy on a wall. Because these are 100V line attenuators (sometimes called volume controls in the US), they are meant for constant voltage speaker networks rather than low impedance hi-fi wiring. Fit one per zone and you get simple local control with the safety of automatic fire alarm override.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttenuation\u003c\/td\u003e\n\u003ctd\u003e3dB per graduation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency response\u003c\/td\u003e\n\u003ctd\u003e35Hz - 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay\u003c\/td\u003e\n\u003ctd\u003e24V, 50mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (assembled)\u003c\/td\u003e\n\u003ctd\u003e85mm x 85mm x 75mm (inc. back bo x )\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting depth\u003c\/td\u003e\n\u003ctd\u003e47mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch5\u003eDownloads\u003c\/h5\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/952467UK_3a6419ac-66c4-4107-b91a-05bdcad8e5cc.pdf?v=1785052899\" target=\"_blank\"\u003eProduct Manual\u003c\/a\u003e\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the power rating of the V36-VR?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is rated at 36W and is designed for use on 100V line speaker systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the relay bypass work?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe built-in 24V relay bypasses the attenuator and restores full volume when triggered from a fire alarm panel, so emergency messages are always heard.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many attenuation steps does it have?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThere are 10 steps in total: eight 3dB steps and two 6dB steps, giving graduated control from full volume down to off.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it come with a back box?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. Each unit is supplied with a plastic surface mount back box, an ABS faceplate and a matching plastic knob.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the dimensions?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe assembled unit measures 85 x 85 x 75mm including the back box, with a mounting depth of 47mm.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this on a low impedance speaker system?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. This is a 100V line attenuator and should be used on constant voltage networks rather than low impedance hi-fi wiring.\u003c\/p\u003e\n","brand":"AVSL","offers":[{"title":"Default Title","offer_id":53272115839243,"sku":"952.467UK","price":29.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/952467UK_0.jpg?v=1785052915","url":"https:\/\/niori.co.uk\/products\/adastra-v36-vr-100v-volume-control-with-24v-relay","provider":"Niori","version":"1.0","type":"link"}