Started by an engineer tinkering with audio cables in pursuit of better sound, Monster is credited with creating the marking in high-quality audio and video cables. There are over 6,000 products sold by Monster Products today, including ethernet, USB, HDMI, and hi-def audio/video cables; headphones; speakers; mobile products; and Apple accessories. Monster Products deals are offered by thousands of retailers around the world, including Amazon, Sears, Microsoft and Best Buy. Use Monster Products coupons to boost the sound quality in your home entertainment system or car stereo or the video quality on your HD TV.