Alesis Introduces M1 Active Biamplified Reference Monitor

September 26, 1998 -- Alesis introduces the new M1 Active Biamplified Reference Monitor, the first powered monitor in the company's line of award-winning acoustic products. The M1 Active's internal active crossover and custom-designed dual amplifiers ensure a broad, extremely accurate frequency response, clear imaging with a wide sweet spot, high power handling and detailed high- and mid-frequency.

The M1 Active features custom drivers designed for the most linear, low distortion response in powered monitoring applications. Its 6.5" woofer cone is formulated from a high tensile strength, low weight, non-woven carbon fiber used for the skins of combat aircraft wings. The carbon fiber is 25% lighter than polypropylene (the most common driver material) providing quicker transient response in the low frequency range and a vast improvement in the detail of critical upper-mid frequencies.

The M1 Active's 1" tweeter dome is made of pure silk, which offers a natural response that aids in preventing ear fatigue during long mix sessions. It also features an internal pole piece mounted phasing plug and is ferrofluid cooled to maintain the best balance of transient response to power handling.

Two audiophile-quality amplifiers - a 75-watt woofer amp and a 25-watt tweeter amp - were developed for the M1 Active, along with 8th order high- and low-pass electronic crossover filters. The crossover point was carefully chosen at a low 1500Hz, which produces an extremely wide dispersion zone as well as low midrange coloration. Time alignment circuitry in the tweeter section of this crossover allows the output of frequencies from the high and low drivers to occur in perfect synchronization, avoiding the time smear that's typical in less advanced powered speakers.

The M1 Active's attractive mirror-imaged, charcoal grey cabinet and magnetically shielded drivers allow for placement in close proximity with computer or video monitors. They may be mounted in either a horizontal or vertical placement to best fit the studio's requirements.

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