Request: Spectral Audio Spectral DMA180 is later omgebouwd met de snellere transistoren zoals de S2 DMC15 al verkocht

Beschrijving

Wegens verblijf in buitenland doe ik afstand van mijn Spectral versterkers (de DMC15 staat al te koop) nu ook de DMA180.

Luisteren mag uiteraard maar moet dan wel op afspraak omdat ik veel in het buitenland verblijf op het moment. Luisteren kan gewoon bij mij thuis in Rotterdam.

Is inclusief MIT speakerkabels en interlink dus echt een compleet set. Speelt top.

Samen met de DMC15 is het een topset. Spectral wijzigt weinig aan de apparatuur in de loop der jaren want veel beter gaat het nooit worden.


Spectral Audio DMA-180 High-Current Reference AmplifierTHE TRADE-OFF TRANCENDEDSpectral's DMA-180 High Current Reference Amplifier finally transcends the historical trade-off. As both a true high resolution Spectral amplifier and a true high output current amplifier, the DMA-180 inaugurates a new generation of high performance power amplifiers without compromise. New insights garnered from a decade and a half of primacy in high-speed audio amplifier design, new technology from the instrumentation and recording industries, and ever more sophisticated manufacturing skills have made this new generation of Spectral amplifiers possible.Over the years, Spectral's engineering talents have explored every nuance of designing an almost "infinitely fast" amplifier. Very fast slew rates, very short rise and settling times, very broad bandwidth, very swift input-to-output propagation: these are some of the critical factors which help to achieve the most perfect tracking of the music signal and the lowest possible distortion. Speed is particularly associated with the detailed, delicate reproduction of transient musical events, and the realistic, brilliant and timbrally correct presentation of strong impulsive sounds. Examples include voice articulation, and the effects of muted brass and cymbals. These subtleties are often far more central to authentic recreation of the quality of a musical performance than all the industry standard test bench measurements combined.The fundamental problem has always been how to provide high power at the upper frequencies without introducing artifacts. Electrical energy radiates, and the more one pushes the performance envelope, the harder it is to deal with this radiation. In traditional architectures, it cross-couples into other parts of the circuit, confusing the feedback, and contaminating the incoming program signal with distortion and phantom signals. Reducing this field-interactive distortion to below noise level is an imperative, and is one of the great arts of amplifier design.The key lies in exquisitely tuned circuit layouts, often interleaved or twisted to eliminate stray electromagnetic field interaction. It also requires the shortest possible signal paths, the ideal choice and placement of a variety of amplifying devices, and boundless attention to a host of other details, including - to name but a few - transformer design, power supply components, printed circuit board materials and grounding systems.From the time it introduced the world's first high speed, DC-coupled FET power amplifier, the DMA-100, in 1982, Spectral has maintained a reputation for audio components whose circuit design, exotic high technology parts and materials, and manufacturing quality set them apart from all others.Combining high output current capability with super-responsive, high resolution performance reintroduces the problem of electromagnetic field coupling with a vengeance. Perhaps only a company with Spectral's sophisticated understanding of high speed circuit behavior could have hoped to solve it. The solution required a return to the fundamentals and the invention of a radical new Vertical Dimension Topology and an equally radical new distributed and integrated Focused Power array to square the circle.With these and other innovations, including fully balanced, completely symmetrical circuitry, non-invasive DC servo control, and specially designed high precision power transformers, the DMA-180 achieve