Matthew James Introduces The Cello Rhapsody Amplifier And Cello Strings Interconnect And Speaker Cables

10-Feb-03

Matthew James, L.L.C. has introduced the Cello Rhapsody Amplifier, designed to maintain the lowest possible levels of distortion under actual use, and to perform well under the complex resistive, reactive, and regenerative loading which loudspeakers present to an amplifier. The design approach has been to place importance on the requirements of actual music and film sound reproduction, as opposed to simply measuring well on a test bench.All electrical connections for signal flow within the Cello Rhapsody are accomplished via flat silver cables (AWG 10), insulated with Kapton, or by heavy, solid copper buss bars. The chassis is manufactured with heavy aluminum plates on all sides. Three specially designed feet, utilizing ball bearings eliminate the possibility of surface-borne disruptions from affecting the performance of the circuitry. A new style of toroidal transformer has been developed and utilized to improve efficiency, and reduce the possibility of noise under all conditions.The Cello Rhapsody Amplifier utilizes XLR connectors for balanced interconnection and includes a remote turn-on trigger, simplifying placement considerations in all types of installations. The Cello Rhapsody Amplifier is available either as a two-channel or as a three-channel amplifier (delivering 200 watts per channel into an 8-ohm load in either version).Matthew James, has also developed the next generation of Cello Strings Interconnect and Speaker Cables. Designed with the basic presumption that the ideal conductor of electrical signal is both wide and flat, Cello Strings are constructed using flat conductors of very pure silver for the interconnects and copper for the speaker cables. The conductors in both cables are quite substantial--AWG 18 for the interconnect cables and AWG 10 for the speaker cables. In both cables the conductors are very close to each other, separated by ultra-thin layers of polyester terepthalate, insulated with kapton, and twisted together within a jacket of Lexan polycarbonate polymer. The effect is that the cables are very insensitive to distortion from AC line or RF interference.The Cello Strings Speaker Cables are low-inductance (4 nH per foot) and low-impedance (3 ohms) and have a loop resistance of 1.1 mohms per foot. Low inductance and capacitance (1.35 nF per foot) results in less loss of signal in the highs and lows, respectively. The low impedance matches as closely as possible the impedance of speakers, eliminating the signal reflections that are the result of mismatches between cables and speakers which add distortions to the upper-midrange and high frequencies, as well as the lower-midrange via entry into amplifier feedback loops. Cello Strings Speaker Cables are terminated with high-quality, Rhodium-plated copper spades.Cello Strings Interconnect Cables incorporate the same type of flat, solid conductors, although in this instance, manufactured in silver, and insulated with a micro-thin dielectric film of Kapton. For complete EMI and RF noise rejection, the interconnects include a ground plane placed between the two signal carriers. Cello Strings Interconnect Cables are available in a single-ended configuration, terminated with RCA connectors, or in a balanced configuration, terminated with either high-quality XLR or Fischer connectors (for use with Cello products previously manufactured by Cello, Ltd.).The Cello Rhapsody amplifier has a worldwide suggested retail price of $17,000 for the two-channel and $20,000 for the three-channel version. A 2-meter pair of Cello Strings interconnect, terminated with Neutrix XLRs has a retail of $520 and a 3-meter pair of Cello Strings speaker cable terminated with Rhodium Plated spade lugs has a retail of $875.For more information, visit www.matthew-james.net.

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