at low prices and audiophiles didn't believe audio cables made a difference in the sound. Monster is credited with creating the market for high-end audio cables in the 1980s through Lee's "marketing prowess". He did demonstrations comparing the audio of standard cables to Monster cables for retailers and trained their salespeople to do the same for customers. Diversification In 1980, Monster Cable Products moved out of Lee's garage and into a San Francisco facility. It also introduced its second audio cable, Interlink. The company grew through word-of-mouth and an increasing number of retailers that carried Monster products. It attempted to enter the market for audio devices for automotive briefly, but withdrew to focus on home entertainment. Its first product intended for the mass-market was introduced in 1987. Monster re-entered the auto audio market in the early 1990s with a new line of speaker cables and its first speaker product, the Persona One. Its high-end M-series product line was introduced in 1992. It also expanded internationally, especially in Asia. Monster had a Taiwanese distributor file its trademark in the region, which led to the distributor continuing to sell products under the Monster brand after their agreement with Monster was terminated. This led to a lengthy legal battle and eventually a settlement. Monster acquired the Entec in-car audio brand in 1998. Monster's program for retailers was formalized in 1993 as the M4 Dealer Success Program. The "M4" stands for four "M"s: Mix (product mix), Merchandising (displays), Monsterization (training) and Management commitment. In the 1990s, the business grew from $20 million in annual revenues to $100 million. By 1998, Monster was producing 1,000 different products out of a distribution and manufacturing center in Brisbane, California, that was established that year. It had created a record label company, Monster Music, in 1989, which was followed by Monster Power for power products such as power cords and surge protectors, in 1998, Monster Game for video game accessories in 2000 and the Monster Mobile division, which markets cell phone and digital camera accessories, in 2001. A Monster Photo product line was created in 2003 that includes power cells, cables and bags for digital cameras, followed by Monster Signature Series Power. In 2004, it created a spin-off called M-Design, run by Lee's son, which sells furniture with electronics built in. Recent history In September 2004, Monster paid $6 million in an agreement with the San Francisco 49ers