{"product_id":"qbp339323","title":"Garmin B75 Thru-Hull Transducer, CHIRP, 600W, 8-Pin, Bronze Housing","description":"\u003ch6\u003eOverview\u003c\/h6\u003e\u003cp\u003eThe Garmin B75 is a bronze, low-profile thru-hull CHIRP transducer family with a 600 W rating, depth sensing, and fast-response water-temperature sensing. It is offered in Mid-CHIRP (80 to 130 kHz) or High CHIRP (130 to 210 kHz) to match the water you run and the type of targets you want to separate.\u003c\/p\u003e\u003cp\u003eMid-CHIRP versions cover 80 to 130 kHz with a 24° to 16° beamwidth and are rated to a maximum depth of 274 m (900 ft). High CHIRP versions cover 130 to 210 kHz with a 15° to 9° beamwidth and are rated to a maximum depth of 214 m (700 ft). Installation is a true thru-hull that uses a 70 mm (2-13\/16\") hole, with a 95 mm (3.75\") usable shaft length.\u003c\/p\u003e\u003cp\u003eThe internal tilt element is fixed at 0°, 12°, or 20° so the sonar beam points straight down when the unit is mounted close to flush. Match the tilt to the hull deadrise at the install location: 0° for 0° to 7°, 12° for 6° to 15°, and 20° for 16° to 24°. The bronze housing is intended for fiberglass or wood hulls and is commonly used on stepped, planing, or displacement hull forms.\u003c\/p\u003e\u003ch6\u003eKey features\u003c\/h6\u003e\u003cul\u003e\n\u003cli\u003e600 W single-band CHIRP transducer with depth and fast-response water-temperature sensing\u003c\/li\u003e\n\u003cli\u003eMid-CHIRP option: 80 to 130 kHz with 24° to 16° beamwidth\u003c\/li\u003e\n\u003cli\u003eHigh CHIRP option: 130 to 210 kHz with 15° to 9° beamwidth\u003c\/li\u003e\n\u003cli\u003eFixed internal tilt options (0°, 12°, 20°) to match hull deadrise without adding a fairing block\u003c\/li\u003e\n\u003cli\u003eThru-hull mounting with 70 mm (2-13\/16\") hole size and 95 mm (3.75\") usable shaft length\u003c\/li\u003e\n\u003cli\u003eBronze housing for fiberglass or wood hulls, with a low-profile shape that sits close to flush when installed correctly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eVariants\u003c\/h6\u003e\u003cp\u003eThis product is offered in multiple configurations to match both hull deadrise and sonar band.\u003c\/p\u003e\u003cp\u003eThe differences across the range are the fixed tilt angle (0°, 12°, or 20°) and the CHIRP frequency band (Mid-CHIRP or High CHIRP).\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e010-11636-20: Tilt 0° and CHIRP Frequency Mid-CHIRP. A 0° tilt matches flatter mounting areas (0° to 7° deadrise) while keeping the beam pointed down.\u003c\/li\u003e\n\u003cli\u003e010-11636-21: Tilt 12° and CHIRP Frequency Mid-CHIRP. A 12° tilt aligns with moderate deadrise sections (6° to 15°) so the transducer can sit close to flush.\u003c\/li\u003e\n\u003cli\u003e010-11636-22: Tilt 20° and CHIRP Frequency Mid-CHIRP. A 20° tilt matches higher deadrise areas (16° to 24°) where a straight 0° element would aim the beam off to the side.\u003c\/li\u003e\n\u003cli\u003e010-11634-21: Tilt 12° and CHIRP Frequency High CHIRP. High CHIRP uses a narrower beam, which helps when you want tighter target separation in shallower water.\u003c\/li\u003e\n\u003cli\u003e010-11634-22: Tilt 20° and CHIRP Frequency High CHIRP. This combines the higher-deadrise tilt range (16° to 24°) with the High CHIRP band for detailed returns in shallower water.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eInstallation and setup\u003c\/h6\u003e\u003cp\u003eBecause this is a thru-hull install, plan on drilling a 70 mm (2-13\/16\") hole and having clear access inside the hull for the nut and cable routing. Pick a location that stays in clean water at speed and is clear of turbulence sources like strakes, steps, and intakes. A close-to-flush install helps keep drag down and protects the transducer from impact.\u003c\/p\u003e\u003ch6\u003eSonar and system integration\u003c\/h6\u003e\u003cp\u003eVerify that your sonar source supports the band you are selecting (Mid-CHIRP vs High CHIRP) and that the connector and port type match your system before you commit to cable routing. Once connected, you will get depth plus water-temperature data from the built-in sensor.\u003c\/p\u003e\u003ch6\u003eUse cases on board\u003c\/h6\u003e\u003cp\u003eMid-CHIRP is a solid fit for boats that split time between shallow and mid-depth water and still want meaningful bottom detail. High CHIRP is a better match when you spend more time in shallower water and care about separating targets near structure.\u003c\/p\u003e\u003cp\u003eThis transducer family makes sense for fiberglass and wood-hull boats where you want a low-profile thru-hull installation and you can choose a fixed tilt that matches the deadrise at the mounting spot.\u003c\/p\u003e","brand":"Garmin","offers":[{"title":"0° \/ Mid-CHIRP","offer_id":52270822785205,"sku":"QBP339323-V1","price":879.99,"currency_code":"USD","in_stock":false},{"title":"12° \/ Mid-CHIRP","offer_id":52270822817973,"sku":"QBP339323-V2","price":879.99,"currency_code":"USD","in_stock":false},{"title":"20° \/ Mid-CHIRP","offer_id":52270822850741,"sku":"QBP339323-V3","price":879.99,"currency_code":"USD","in_stock":true},{"title":"12° \/ High CHIRP","offer_id":52270822883509,"sku":"QBP339323-V4","price":929.99,"currency_code":"USD","in_stock":false},{"title":"20° \/ High CHIRP","offer_id":52270822916277,"sku":"QBP339323-V5","price":929.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/8171\/1029\/files\/1306066_qbp339323.jpg?v=1771551250","url":"https:\/\/www.qualityboatparts.com\/products\/qbp339323","provider":"Quality Boat Parts","version":"1.0","type":"link"}