{"product_id":"extron-sm-3-42-133-03","title":"Extron SM 3 1-Way Surface Mount Speaker White Pair 42-133-03","description":"\u003cp\u003e\u003cstrong\u003eExtron SM 3\u003c\/strong\u003e (part number 42-133-03) — a compact one-way surface mount speaker pair finished in white for space-constrained wall audio.\u003c\/p\u003e\n\u003cp\u003eThe SM 3 uses a single 3-inch paper cone driver with a tuned bass reflex port inside a shallow trapezoidal enclosure that protrudes less than 4 inches from the wall when mounted with the included 0° plate, meeting ADA Section 307 protrusion limits. The same concealed SpeedMount hardware used across Extron's surface speaker line lets a low-voltage contractor terminate cable to the mounting plate during rough-in, with the speaker added later by a separate crew.\u003c\/p\u003e\n\u003ch3\u003eKey Capabilities\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e15 W continuous pink noise, 30 W continuous program power handling per pair\u003c\/li\u003e\n\u003cli\u003eFrequency range of 100 Hz to 20 kHz (-10 dB, full space)\u003c\/li\u003e\n\u003cli\u003eWide 120° horizontal and 130° vertical coverage angles\u003c\/li\u003e\n\u003cli\u003eIncludes both 0° and 10° mounting plates for flexible aiming\u003c\/li\u003e\n\u003cli\u003eADA-compliant 4-inch maximum protrusion with 0° mounting plate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhere It Is Used\u003c\/h3\u003e\n\u003cp\u003eThe SM 3 fits small to medium classrooms and conference rooms where wall space is limited and a low-profile, ADA-compliant speaker is required alongside a division-of-labor installation workflow.\u003c\/p\u003e\n\u003ch3\u003eSpecifications at a Glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3-inch paper cone driver, 8 ohm nominal impedance\u003c\/li\u003e\n\u003cli\u003e8.75\" H x 5.75\" W x 4.0\" D with 0° mounting plate attached\u003c\/li\u003e\n\u003cli\u003e2.0 lbs single speaker weight\u003c\/li\u003e\n\u003cli\u003e83 dB nominal sensitivity at 1 W, 1 m\u003c\/li\u003e\n\u003cli\u003e5-year parts and labor warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlso referenced as Extron SM3, SM-3, part number 42133-03.\u003c\/p\u003e","brand":"Extron","offers":[{"title":"Default Title","offer_id":52303013576924,"sku":"EXTRON-SM3-4213303","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0754\/5582\/4092\/files\/extron-sm-3-42-133-03.jpg?v=1787225011","url":"https:\/\/www.ampronix.com\/products\/extron-sm-3-42-133-03","provider":"Ampronix","version":"1.0","type":"link"}