RR Audio Laboratory has been designing and building quality loudspeakers since 1979, and has conducted extensive research into the characteristics of mechanical and electronic filters as they apply to loudspeakers, as well as acoustical properties of loudspeakers enclosures and rooms. In addition, quite a bit of attention has been paid to the way in which the soundwave leaves the enclosure, and the exterior shapes of the Trapagon products are specifically intended to reduce diffraction (spraying) effects - a major cause of image degradation - as well as creating a proper acoustical environment in the enclosure interiors.
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The result of a 15-year study of the movement of sound waves as they leave enclosures and their properties inside enclosures, the Trapagon 3 enclosure is non-parallel in 3 dimensions. The upper section of the front panel tips away from the listener to time align the acoustical centers of the mid and high frequency drivers. The exterior wing structure reduces diffraction effects (which cause spraying and defocusing of the image to a great degree) creating a large and sharply focused image. The interior angles spread the frequencies of standing waves inside the enclosure. Reflex tuning of the enclosure is by means of 2 ports of different lengths, which tune the enclosure using low-Q techniques at separate frequencies, contributing to the tight, deep bass. The system offers exceptional transparency and detail, a large sharply focused image, and tremendous impact and authority in the low frequencies.
The filter networks used to control the driver blending are linear phase third-order types designed for optimum transient response, and are built with ribbon inductors, polypropylene capacitors, and military-grade resistors. The Trapagon 2802 system provides unprecedented performance without the sound pressure restrictions normally associated with high-resolution monitors. Its ability to sustain in excess of 110 dB allows the recreation of live listening levels without strain, and without loss of detail. The acoustically correct enclosure minimizes interior standing waves, creating a major reduction of low- and mid-frequency anomalies, and the 4-winged face reduces diffraction significantly, generating a large, wide, and sharply focused image. The acceleration and impact are truly astounding.
The filter networks are both low-Q 3rd-order types, but are of slightly different filter families due to the very different nature of the drive units. The ribbon HF unit in the R1 is one of the finest drivers available, with its tremendous magnetic drive system and its very low mass diaphragm. The Raven 1 is a 1/2-size version of the Raven 2 ribbon used in the Trapagon 2802, and is capable of the same speed and detail retrieval as the professional system, although the system is less sensitive and has a lower sound pressure limit.The 702R and R1 use Transitional Gaussian or Linear phase filters with matched ribbon inductors, polypropylene capacitors, and quality resistors. The 702 enclosures are 12-sided polygons with trapezoidal, 4-winged faces. The wing structures significantly reduce diffraction effects (spraying of the soundwave as it leaves the enclosure - a major cause of image degradation), as well as contribute to the acoustical properties of the enclosure interior. The small panel areas keep the vibration to a minimum, and place the frequency of vibrations well above LF resonances. An excellent small speaker system.
Measuring 12" high by 12" deep by 21" wide, the enclosure is tuned using low-Q bass reflex techniques and provides quick, extended low frequency performance for a system of this size. The filter networks used to control driver blending are also low-Q types, designed with linear phase third-order topology for optimum transient response, and are built with ribbon inductors and polypropylene capacitors throughout the network. The Trapagon Nearfield provides exceptionally detailed performance, with a large, sharply focused image and accurate frequency response. The 3-winged, non-parallel enclosure shape creates an acoustically correct environment for the rear-wave of the LF driver, minimizing standing waves inside the enclosure and reducing low- and mid-frequency anomalies significantly. In addition, the winged face reduces diffraction to a great degree, establishing an amazingly coherent image. The high acceleration caused by the low-mass drivers and the powerful magnetic drive systems allows the speaker to follow the most demanding musical passages with ease, reducing listener fatigue considerably.
The HF driver is a very high resolution device normally used only in much more expensive systems, such as the Trapagon 3. The enclosure design utilizes a large radiused edge around the front panel to reduce diffraction effects which cause defocusing of the image. The rear section has a triangular shape, which bounces the rear wave of the LF driver on paths which allow it to be absorbed by more of the damping material, reducing a major source of distortion, and also makes the front and rear of the enclosure non-parallel, which spreads the frequencies of one of the standing wave modes in the enclosure and greatly increases midrange accuracy. The filter network is a Transitional-Gaussian 3rd-order, a low-Q type which maintains a very high degree of phase linearity and excellent transient response. The 502R Pentagon a truly exceptional small speaker system. 15"H x 10"W x 12"D.