The JBL 4312 prototype was launched in 1971 and was positioned as a mid-priced mid-sized monitor speaker that could also be used in the home. The basic design has been followed to this day, using a 3-unit 3-way front-firing, 300mm diameter paper cone woofer, metal film tweeter, high/midrange attenuation regulator and single-wire crossover. After several improved models such as 4312XP, 4312M, and 4312MKⅡ, the latest improved model 4312SX is finally ushered in.
Speaking of JBL, I believe everyone does not know that this American speaker brand, which has been established for nearly 60 years, has a wide range of product lines, both civilian and professional products are of high quality and has a number of design patents. Audio players with some experience will know JBL's 4000 series of monitor speakers. This series of products has maintained a basically fixed shape since its prototype was launched in the 1970s. It has since derived 4400, 4300, 4200, etc. Several major models.