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Menu Home Audio & Video HiFi audioTurntables MIT Magnum MA RCA Cables 6m Pair Interconnects; Adjustable Impedance Liquid error: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index Liquid error: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index Liquid error: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index Liquid error: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index Magnum MA Performance and Articulation What is articulation and what does the articulation measurement mean? Articulation Engineering terms such as transfer function, slope of the phase, group delay, time domain frequency domain etc. do not adequately describe what we actually hear. At MIT, we have adopted the term articulation to better describe this phenomenon. The word articulation best describes sound as it is heard naturally or three dimensionally. Some words that are used when describing articulation in audio systems are: intelligibility; masking; clarity; discrimination; sensitivity; duration; timing; detail; attack and decay; rise and fall time; and loudness. Individually or collectively, these words are used to indicate a system’s ability to articulate. When a system articulates properly, one immediately notices speech as being distinct and intelligible. Vowels are clearly articulated, not slurred, and consonants are sharp and distinct. Also, every instrument in the orchestra is heard with pin point location within the complex sound stage. In the context of this paper, articulation is the ability to retain the highest level of detail and clarity in all amplified speech and sound applications. Along with frequency response and intensity/loudness, all speech and sound must retain proper attack and decay, thereby preserving the natural timing cues required for the listener to accurately locate individual sounds, over distance, within a complex sound field. At MIT, we have discovered a measurable response that correlates precisely with what we hear— The Articulation Response Conventional wisdom views the only meaningful specification regarding interfacing is the frequency response between components; ie. between a pre-amplifier and an amplifier. By default, all audio cables function as a low pass filter, so there is always a high frequency roll-off, hopefully this roll-off is at a frequency much higher than 20kHz. The typical –3dB corner frequency is usually well above 20kHz. This frequency is generally found somewhere between 150kHz and 1.5MHz, well above the audible frequency range. However, there is a second response that exists well below the –3dB down corner frequency. This is the articulation response of the cable. Measuring the articulation response identifies and explains the problems that we hear. Primarily, these problems will be, a general masking of detail or an overall lack of clarity or intelligibility. Interpreting the articulation measurement Ideally, the articulation response of the cable used in any given system should cover the bandwidth, uniformly, over the entire frequency range of the sound being transmitted. In the case of music this is generally considered to be 20Hz – 20kHz. In the case of high quality speech it is usually 200Hz – 7kHz, and for low quality speech the frequency span is t across the graph horizontally represents zero (0%) percent articulation (please see graphs on next page). A cable starts to become articulate at 10%, while 25% is desirable, and 50% articulation represents a perfect cable (red line). The rate at which a cable rises to its full value is also important. Cables that rise very slowly over a wide band of frequencies are not desirable, while cables that rises to at least 10% produces a minimum level articulation. A cable that rises quickly to 25% or higher is very desirable. Generally speaking, a cable that rises and peaks at a frequency equal to 50% of the desired bandwidth (20kHz/2 or 10kHz) will be accepted by both the recording and the audiophile communities. Below 10% articulation, it can be expected that the cable will greatly degrade the performance of the components and the system it is interfacing. For more information on articulation, power and MIT technologies visit the Technology section of the MIT website: www.mitcables.com Featured products Klipsch has revoiced the Forte IV with a fresh crossover network based on the steep-slope design in their premium Klipschorn and La Scala models. 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