User manual MARTIN AUDIO MA1.4

[. . . ] MA1. 4 High Performance Amplifier User Guide The Martin Experience All material © 2010. Subject to change without notice. Contents Warning notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1 Installation and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1. 1 1. 2 1. 3 1. 4 1. 5 1. 6 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] No other amplifiers come close for applications demanding high power and long term reliability. Thanks to amazing reductions in heat output along with reductions in weight and the specific high output power, MA1. 4 amplifiers can be used in an unlimited range of applications such as concert touring, opera houses, theatres, churches, cinema, theme parks, television sound stages and stadiums. More sound and less weight Compared to a conventional amplifier, Martin Audio MA1. 4 technology offers very high efficiency and delivers more power to the loudspeakers with greatly reduced heat dissipation. This greater efficiency enables dimensions, weight and power consumption to be reduced. The output stages of the amplifiers typically run at 95% efficiency, dissipating only 5% of the input energy as heat. One of the most interesting characteristics is that MA1. 4 efficiency is almost independent of output level. Conventional amplifiers achieve their best efficiency only at full rated power output. Since standard music has an average power density of 40% of the maximum level, conventional amplifiers can easily generate 10 times more heat than MA1. 4 amplifiers for the same volume of sound. Superior Sound-Sonic Accuracy Crystal-clear highs and a tight, well-defined low end: the most accurate reproduction of an audio signal. Patented design features ensure very high performance over parameters such as distortion, frequency response, slew rate, power bandwidth and dumping factor. Totally Digital with High Reliability The MA1. 4 series is based on PWM technology that has been used for 30 years or more in power supplies and inverters. PWM provides high reliability, small size, low weight and high efficiency. A PWM converter works as a high frequency sampler, converting the variable amplitude (audio) signal into an impulse sequence with average value equal to the audio input. MA1. 4 amplifiers use very high sampling frequencies to obtain high performances across the audio band. Compact & Lightweight Martin Audio MA1. 4 amplifiers offer incredibly compact dimensions are very lightweight making them excellent for applications where space and weight saving are important. The Show Always Goes On The MA1. 4 is completely protected against every possible error in operation and are designed to work under every condition. They will deliver maximum power with maximum safety and increased long-term reliability. Anticipating potential problems at the design stage means your show always goes on! All material © 2010 Martin Audio Ltd. Subject to change without notice 5 1 1. 1 Unpacking Installation and operation Carefully open the shipping carton and check for any noticeable damage. Every Martin Audio amplifier is completely tested and inspected before leaving the factory and should arrive in perfect condition. If you find any damage, notify the shipping company immediately. Be sure to save the carton and all packing materials for the carrier's inspection. 1. 2 Mounting The MA1. 4 amplifiers will mount in a standard 19" rack. [. . . ] Once the heatsink has cooled below 85°C the amplifier will automatically un-mute but the TEMP LED will remain lit until the temperature has dropped to 75°C. It is possible to reduce the temperature reducing the output power. 3. 4 DC fault protection If DC or excessive subsonic energy appears at a channel output, an instantaneous protection circuit will mute both channels of the amplifier. The amplifier shutdown is used instead off of speaker relays, thereby improving the damping factor and reliability of the MA1. 4. 3. 5 Input / Output protection An ultrasonic network decouples RF from the outputs and keeps the amplifier stable with reactive loads. All material © 2010 Martin Audio Ltd. Subject to change without notice 12 4 4. 1 Cleaning User Maintenance Disconnect the amplifier from the AC main source first; use a soft cloth and mild non-abrasive solution to clean the faceplate and chassis. 4. 2 Service There are no user-serviceable parts in your MA1. 4 amplifier. [. . . ]