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Home
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Tube Power Amplifiers
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PrimaLuna
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Prima Luna Prologue 7 Valve Monoblock Amps
PrimaLuna Prologue 7
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Posted On
20.05.2025
Last Update On
20.05.2025
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Very good.The ProLogue Seven, at the top of PrimaLuna's amplifier line, produces a maximum output of 70W. Its circuitry is "classic ultralinear," with dual-feedback topology: cross-coupled current feedback for gain stability, then an additional small amount of negative feedback to obtain low distortion and low output impedance. This design is claimed to produce all the benefits of feedback without any of its drawbacks. An interesting feature of the Seven is that, in addition to the supplied KT88s, it accepts a wide range of other tubes as well, including EL34, 6L6GC, 7581A, and KT66, the power output dropping slightly when using any of these tubes. This flexibility is made possible by the action of a circuit called Adaptive Autobias, which monitors bias, adjusting it as necessary to reduce distortion and to compensate for tube aging
Sehr gut.Der ProLogue Seven, der an der Spitze der PrimaLuna-Verstärkerlinie steht, erzeugt eine maximale Leistung von 70 W. Die Schaltung ist "klassisch ultralinear" mit Dual-Feedback-Topologie: kreuzgekoppelte Stromrückkopplung für Verstärkungsstabilität, dann eine zusätzliche kleine Menge an negativer Rückkopplung, um eine geringe Verzerrung und eine niedrige Ausgangsimpedanz zu erzielen. Es wird behauptet, dass dieses Design alle Vorteile des Feedbacks ohne seine Nachteile bietet. Ein interessantes Merkmal der Seven ist, dass sie neben den mitgelieferten KT88 auch eine Vielzahl anderer Röhren akzeptiert, darunter EL34, 6L6GC, 7581A und KT66, wobei die Ausgangsleistung bei Verwendung einer dieser Röhren leicht abnimmt. Diese Flexibilität wird durch die Wirkung einer Schaltung namens Adaptive Autobias ermöglicht, die die Vorspannung überwacht und sie bei Bedarf anpasst, um Verzerrungen zu reduzieren und die Röhrenalterung zu kompensieren
Muy bien.El ProLogue Seven, en la parte superior de la línea de amplificadores de PrimaLuna, produce una potencia máxima de 70W. Su circuitería es "ultralineal clásica", con topología de doble retroalimentación: retroalimentación de corriente acoplada cruzada para la estabilidad de la ganancia, luego una pequeña cantidad adicional de retroalimentación negativa para obtener una baja distorsión y una baja impedancia de salida. Se afirma que este diseño produce todos los beneficios de la retroalimentación sin ninguno de sus inconvenientes. Una característica interesante del Seven es que, además de los KT88 suministrados, también acepta una amplia gama de otros tubos, incluidos EL34, 6L6GC, 7581A y KT66, la potencia de salida disminuye ligeramente cuando se usa cualquiera de estos tubos. Esta flexibilidad es posible gracias a la acción de un circuito llamado Adaptive Autobias, que monitorea la polarización, ajustándola según sea necesario para reducir la distorsión y compensar el envejecimiento del tubo
Çok iyi.PrimaLuna'nın amplifikatör serisinin en üstünde yer alan ProLogue Seven, maksimum 70W çıkış üretir. Devresi, çift geri beslemeli topolojiye sahip "klasik ultralineer" dir: kazanç kararlılığı için çapraz bağlı akım geri beslemesi, ardından düşük bozulma ve düşük çıkış empedansı elde etmek için ek az miktarda negatif geri besleme. Bu tasarımın, herhangi bir dezavantajı olmadan geri bildirimin tüm faydalarını ürettiği iddia edilmektedir. Yedi'nin ilginç bir özelliği, birlikte verilen KT88'lere ek olarak, EL34, 6L6GC, 7581A ve KT66 dahil olmak üzere çok çeşitli diğer tüpleri de kabul etmesi ve bu tüplerden herhangi birini kullanırken güç çıkışının biraz düşmesidir. Bu esneklik, sapmayı izleyen, bozulmayı azaltmak ve tüp yaşlanmasını telafi etmek için gerektiği gibi ayarlayan Uyarlanabilir Autobias adı verilen bir devrenin etkisiyle mümkün olur
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