{"product_id":"qtx-passive-subwoofer-filter-120hz-4-ohms-400w","title":"QTX Passive Subwoofer Filter, 120Hz, 4 Ohms, 400W","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThese QTX passive subwoofer filters are made for use in Hi-Fi and PA loudspeaker systems. They handle the crossover work inside the enclosure, sending low frequencies to the subwoofer (sub) and keeping higher content away from it. Because they are passive, they run from the amplifier signal and need no separate power supply, which keeps wiring straightforward inside a cabinet build.\u003c\/p\u003e\n\u003cp\u003eThe crossover frequency is set at 120Hz, with a damping factor of 12dB per octave. That slope gives a reasonably clean roll-off, so the sub covers the low end while the rest of your speaker system takes care of the mids and highs. The filter is rated at 4 ohms and handles up to 400W, which suits it to full-size PA and Hi-Fi builds rather than small bookshelf units.\u003c\/p\u003e\n\u003cp\u003eConnections are made by solder terminals, so you can wire the filter directly into your loudspeaker circuit for a secure, permanent joint. This is a component part rather than a finished product, aimed at anyone building or repairing a subwoofer enclosure. If you know your driver impedance and power handling, matching this filter is a simple job, and it gives you a fixed crossover point without having to design the network yourself.\u003c\/p\u003e\n\u003ch5\u003eSpecification\u003c\/h5\u003e\n\u003ctable class=\"spec_table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower rms\u003c\/td\u003e\n\u003ctd\u003e160W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower peak\u003c\/td\u003e\n\u003ctd\u003e400W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDamping\u003c\/td\u003e\n\u003ctd\u003e12dB\/Oct.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency\u003c\/td\u003e\n\u003ctd\u003e120Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImpedance\u003c\/td\u003e\n\u003ctd\u003e4 Ohm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eIs this an active or passive filter?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is a passive filter, so it runs from the amplifier signal inside the speaker circuit and needs no separate power supply.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat crossover frequency does it use?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe crossover frequency is fixed at 120Hz, with a slope of 12dB per octave.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat impedance and power rating does it support?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is rated at 4 ohms and handles up to 400W, suiting full-size Hi-Fi and PA builds.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow are the connections made?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eConnections are by solder terminals, so the filter is wired directly into your loudspeaker circuit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere is this filter used?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is designed for subwoofer sections in Hi-Fi and PA loudspeaker systems, typically fitted inside the enclosure.\u003c\/p\u003e\n","brand":"AVSL","offers":[{"title":"Default Title","offer_id":53272096571659,"sku":"900.582UK","price":11.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/900582UK_0.jpg?v=1785046754","url":"https:\/\/niori.co.uk\/products\/qtx-passive-subwoofer-filter-120hz-4-ohms-400w","provider":"Niori","version":"1.0","type":"link"}