{"product_id":"qbp335304","title":"Garmin Airmar 509LHW Thru-Hull Transducer, 3 kW, CHIRP Low 28-60 kHz, CHIRP High Wide 150-250 kHz, Temperature Sensor, Bare Wire","description":"\u003ch6\u003eOverview\u003c\/h6\u003e\u003cp\u003eThe Garmin 010-12187-20 is a 3 kW thru-hull CHIRP transducer (Airmar 509 LHW) that covers 28 to 60 kHz on the low band and 150 to 250 kHz on the high wide band, with depth and water temperature sensing. The low band is rated for depths up to 3,048 m (10,000 ft) and the high wide band is rated up to 152 m (500 ft), so you can keep a deep-water channel available while still getting a wide view in shallower water. It comes with a 15 m (49 ft) cable that terminates in bare wires, which is typical on high-power installs where wiring is routed directly to a sonar module or a dedicated harness.\u003c\/p\u003e\u003cp\u003eThis is the kind of transducer people put in larger sportfishers and commercial-style builds where clean bottom readings matter at speed and in rough water. The wide high-frequency beam helps keep fish and bait in view without having to run a tight, narrow cone, and the low-frequency side is there for canyon depth and deep structure work.\u003c\/p\u003e\u003ch6\u003eKey features\u003c\/h6\u003e\u003cul\u003e\n\u003cli\u003eLow\/High Wide CHIRP coverage: 28 to 60 kHz low band plus 150 to 250 kHz high wide band.\u003c\/li\u003e\n\u003cli\u003eDepth performance: low band rated up to 3,048 m (10,000 ft); high wide band rated up to 152 m (500 ft).\u003c\/li\u003e\n\u003cli\u003eHigh wide beam stays at 25 degrees across the band for broad coverage in the upper water column.\u003c\/li\u003e\n\u003cli\u003eLow band beam narrows as frequency increases, from 23 degrees to 9 degrees port to starboard and from 11 degrees to 5 degrees fore to aft.\u003c\/li\u003e\n\u003cli\u003eDepth and fast-response water temperature sensing built in.\u003c\/li\u003e\n\u003cli\u003eThru-hull external-mount style with urethane housing and fairing to keep the element in clean water flow.\u003c\/li\u003e\n\u003cli\u003eSupports hull deadrise angles up to 22 degrees.\u003c\/li\u003e\n\u003cli\u003e15 m (49 ft) cable with bare-wire end for wiring into compatible sonar systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eInstallation and setup\u003c\/h6\u003e\u003cp\u003eThis is a thru-hull installation, so plan for haul-out time and interior access to the mounting location. A 3 kW transducer also puts more load on the hull than smaller models, so professional installation is strongly recommended for correct hole prep, bedding, and alignment.\u003c\/p\u003e\u003cp\u003eThe fairing needs to be aligned so the transducer sits level in the water flow. On most boats that means placing it away from steps, strakes, and intakes that can introduce aerated water, and forward of prop wash so the sonar stays clean when you are on plane.\u003c\/p\u003e\u003ch6\u003eCompatibility and fit\u003c\/h6\u003e\u003cp\u003eYour sonar system must be able to drive a transducer rated up to 3 kW on the low band, and it must support Low\/High Wide CHIRP operation across the stated frequency ranges. The cable terminates in bare wires, so confirm the correct wiring interface or adapter harness for your specific Garmin sonar module or chartplotter setup.\u003c\/p\u003e\u003cp\u003eThis model is commonly installed with Garmin sounder modules such as the GSD 25 or GSD 26 when a separate black box is used, especially in builds where longer cable runs and dedicated sonar power are part of the plan.\u003c\/p\u003e\u003ch6\u003eUse cases on board\u003c\/h6\u003e\u003cp\u003eFor offshore runs, the 28 to 60 kHz low band is there for deep bottom tracking and marking structure, while the 150 to 250 kHz high wide band keeps coverage wide in water depths up to 152 m (500 ft). It is a good match for owners and captains who fish a mix of deep drops and shallower ledges and want one thru-hull to cover both without swapping transducers.\u003c\/p\u003e\u003ch6\u003eMaintenance and care\u003c\/h6\u003e\u003cp\u003eKeep the transducer face and fairing clean of growth to maintain consistent returns, especially if the boat lives in the water. During haul-outs, inspect the bedding and fasteners, and check the fairing for impact damage or movement.\u003c\/p\u003e\u003cp\u003eAvoid aggressive scraping tools on the acoustic window, and do not aim a high-pressure washer directly at seals or cable exits.\u003c\/p\u003e\u003ch6\u003eWhat's included\u003c\/h6\u003e\u003cul\u003e\n\u003cli\u003eThru-hull transducer with attached 15 m (49 ft) bare-wire cable\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Garmin","offers":[{"title":"Default Title","offer_id":52269487784117,"sku":"QBP335304","price":5999.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/8171\/1029\/files\/1300137_qbp335304.jpg?v=1771544246","url":"https:\/\/www.qualityboatparts.com\/products\/qbp335304","provider":"Quality Boat Parts","version":"1.0","type":"link"}