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Krell
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Krell Duo 300 XD Power Amp
Krell Duo 300
Krell Presentation Page >
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Posted On
29.04.2025
Last Update On
29.04.2025
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Excellent condition.A comment on the new Krell sound from our XD upgraded amplifiers…Initially, there’s no comparison between the two models (pre and post XD upgrade) – the jump in resolution and musicality is massive. It’s like they are channeling the sound that made Krell famous, while incorporating the changes in technology that have come to be over the last 35 yearsWhen developing the DUO300-XD, David Goodman, our Director of Product Development, whom has been with Krell since 1987 and was largely responsible for design work on all Krell products, discovered that with modifications to the output stage, we could vastly improve sound quality, across the board, to all of our amplifiers.
THE RESULT
A deeper, darker, blacker background that provided significantly better macro and micro dynamics, more silence between the notes. Vocals and midrange took on an organic, yet more vibrant tone, enabling us to hear much more body, and even though our amps were great before, there was a very significant improvement.The speakers disappeared; yet, instruments were more focused with appropriate size and specific soundstage locations. All in all, a much better sounding, much improved experience that was easily, immediately heard by all that listened.Features & Specifications300 Watt Amplifier Featuring Krell iBias TechnologySpecificationsFrequency response20 Hz to 20 kHz +0, -0.13 dB0.5 Hz to 100 kHz +0, -3 dBSignal-to-noise ratio>98 dB, wideband, unweighted, referred to full power output>116 dB, “A”-weightedGain26.2 dBTotal harmonic distortion<0.045% at 1 kHz, at 400 W, 8 Ω<0.17% at 20 kHz, at 400 W, 8 ΩInput ImpedanceSingle-ended: 100 kΩBalanced: 200 kΩInput sensitivitySingle-ended or balanced: 2.4 V RMSOutput power300 W RMS at 8 Ω540 W RMS at 4 ΩOutput voltage138 V peak-to-peak49 V RMSOutput current16 A peakSlew rate40 V/μsOutput impedance<0.017 , 20 Hz to 20 kHz Damping factor >470, 20 Hz to 20 kHz, referred to 8 ΩPower consumptionStandby: 4 WIdle: 180 WMaximum: 1600 WHeat outputStandby: 13.7 BTU/hr.Idle: 615 BTU/hr.Maximum: 5677 BTU/hr.Inputs2 single-ended via RCA connector2 balanced via XLR connectorOutputs2 pairs binding postsDimensions17.1 in. W x 7.65 in. H x 21.10in. D434 mm W x 194 mm H x 536mm DWeight80 lbs., 3.64 kg (shipping)70 lbs., 31.8 kg (unit only)
Ausgezeichneter Zustand.Ein Kommentar zum neuen Krell-Sound unserer XD-Verstärker... Zunächst gibt es keinen Vergleich zwischen den beiden Modellen (vor und nach dem XD-Upgrade) – der Sprung in Auflösung und Musikalität ist enorm. Es ist, als würden sie den Klang kanalisieren, der Krell berühmt gemacht hat, und gleichzeitig die technologischen Veränderungen der letzten 35 Jahre einbeziehen. Bei der Entwicklung des DUO300-XD hat David Goodman, unser Director of Product Development, der seit 1987 bei Krell arbeitet und maßgeblich für die Designarbeit an allen Krell-Produkten verantwortlich war, Ich habe festgestellt, dass wir mit Modifikationen an der Endstufe die Klangqualität aller unserer Verstärker auf ganzer Linie erheblich verbessern konnten.
DAS ERGEBNIS
Ein tieferer, dunklerer, schwärzerer Hintergrund, der für eine deutlich bessere Makro- und Mikrodynamik sorgte, mehr Stille zwischen den Noten. Gesang und Mitten bekamen einen organischen, aber lebendigeren Ton, der es uns ermöglichte, viel mehr Körper zu hören, und obwohl unsere Verstärker vorher großartig waren, gab es eine sehr deutliche Verbesserung. Die Lautsprecher verschwanden; Die Instrumente waren jedoch fokussierter und hatten eine angemessene Größe und bestimmte Standorte auf der Klangbühne. Alles in allem ein viel besser klingendes, viel verbessertes Erlebnis, das von allen, die zuhörten, leicht und sofort gehört wurde.Merkmale und Spezifikationen300-Watt-Verstärker mit Krell iBias-TechnologieSpezifikationenFrequenzgang20 Hz bis 20 kHz +0, -0,13 dB0,5 Hz bis 100 kHz +0, -3 dBSignal-Rauschabstand>98 dB, breitbandig, unbewertet, bezogen auf die volle Ausgangsleistung>116 dB, "A"-gewichteteVerstärkung26,2 dBHarmonische Gesamtverzerrung<0,045 % bei 1 kHz, bei 400 W, 8 Ω<0,17 % bei 20 kHz, bei 400 W, 8 ΩEingangsimpedanzEinseitig: 100 kΩbältig: 200 kΩEingangsempfindlichkeitUnsymmetrisch oder symmetrisch: 2,4 V RMSAusgangsleistung300 W RMS bei 8 Ω540 W RMS bei 4 ΩAusgangsspannung138 V Spitze-Spitze49 V RMSAusgangsstrom16 A SpitzeAnstiegsrate40 V/μsAusgangsimpedanz<0,017 , 20 Hz bis 20 kHz Dämpfungsfaktor >470, 20 Hz bis 20 kHz, bezogen auf 8 ΩLeistungsaufnahmeStandby: 4 WIdle: 180 WMaximum: 1600 WHeizleistungStandby: 13,7 BTU/Std. Leerlauf: 615 BTU/Std. Maximal: 5677 BTU/Std.Eingänge2 unsymmetrisch über Cinch-Anschluss2 symmetrisch über XLR-AnschlussAusgänge2 Paare PolklemmenAbmessungen17,1 Zoll B x 7,65 Zoll H x 21,10 Zoll. T434 mm B x 194 mm H x 536 mm TGewicht80 lbs., 3,64 kg (Versand)70 lbs., 31,8 kg (nur Einheit)
Excelente estado.Un comentario sobre el nuevo sonido Krell de nuestros amplificadores actualizados XD... Inicialmente, no hay comparación entre los dos modelos (antes y después de la actualización de XD): el salto en resolución y musicalidad es enorme. Es como si estuvieran canalizando el sonido que hizo famoso a Krell, al tiempo que incorporan los cambios en la tecnología que se han producido en los últimos 35 años. Al desarrollar el DUO300-XD, David Goodman, nuestro Director de Desarrollo de Productos, que ha estado con Krell desde 1987 y fue en gran parte responsable del trabajo de diseño en todos los productos Krell, Descubrimos que con modificaciones en la etapa de salida, podíamos mejorar enormemente la calidad del sonido, en todos los ámbitos, de todos nuestros amplificadores.
EL RESULTADO
Un fondo más profundo, más oscuro, más negro que proporcionaba una dinámica macro y micro significativamente mejor, más silencio entre las notas. Las voces y los medios adquirieron un tono orgánico, pero más vibrante, lo que nos permitió escuchar mucho más cuerpo, y aunque nuestros amplificadores eran geniales antes, hubo una mejora muy significativa. Los altavoces desaparecieron; Sin embargo, los instrumentos estaban más enfocados con el tamaño apropiado y las ubicaciones específicas del escenario sonoro. En general, una experiencia con un sonido mucho mejor, muy mejorada, que fue escuchada fácil e inmediatamente por todos los que la escucharon.Características y especificacionesAmplificador de 300 vatios con tecnología Krell iBiasEspecificacionesRespuesta de frecuencia20 Hz a 20 kHz +0, -0,13 dB0,5 Hz a 100 kHz +0, -3 dBRelación señal/ruido>98 dB, banda ancha, no ponderada, referida a la potencia máxima de salida>116 dB, ponderada "A"Ganancia26,2 dBDistorsión armónica total<0,045% a 1 kHz, a 400 W, 8 Ω<0,17% a 20 kHz, a 400 W, 8 ΩImpedancia de entradaDe un solo extremo: 100 kΩBalanceado: 200 kΩSensibilidad de entradaDe un solo extremo o balanceado: 2,4 V RMS Potencia desalida300 W RMS a 8 Ω540 W RMS a 4 ΩVoltaje de salida138 V pico a pico49 V RMS Corriente desalida16 A pico Velocidad derespuesta40 V/μsImpedancia de salida<0.017 , 20 Hz a 20 kHz Factor de amortiguación >470, 20 Hz a 20 kHz, referido a 8 Ω Consumo deenergíaEn espera: 4 WIdle: 180 WMaximum: 1600 WPotencia caloríficaEn espera: 13,7 BTU/h. Inactivo: 615 BTU/hr. Máximo: 5677 BTU/hr.Entradas2 de un solo extremo a través de conector RCA2 balanceado a través de conector XLRSalidas2 pares de postes de uniónDimensiones17.1 pulg. Ancho x 7,65 pulg. H x 21.10 pulg. D434 mm de ancho x 194 mm de alto x 536 mm de profundidadPeso80 libras, 3,64 kg (envío)70 libras, 31,8 kg (solo unidad)
Mükemmel durum.XD yükseltilmiş amplifikatörlerimizden gelen yeni Krell sesi hakkında bir yorum... Başlangıçta, iki model arasında bir karşılaştırma yoktur (XD yükseltmesi öncesi ve sonrası) - çözünürlük ve müzikalitedeki sıçrama çok büyük. Sanki Krell'i ünlü yapan sesi kanalize ediyorlar ve son 35 yılda teknolojide meydana gelen değişiklikleri bir arayagetiriyorlar DUO300-XD'yi geliştirirken, 1987'den beri Krell'de çalışan ve tüm Krell ürünlerindeki tasarım çalışmalarından büyük ölçüde sorumlu olan Ürün Geliştirme Direktörümüz David Goodman, Çıkış aşamasında yaptığımız değişikliklerle, tüm amplifikatörlerimizde ses kalitesini büyük ölçüde iyileştirebileceğimizi keşfettik.
SONUÇ
Önemli ölçüde daha iyi makro ve mikro dinamikler, notalar arasında daha fazla sessizlik sağlayan daha derin, daha koyu, daha koyu bir arka plan. Vokaller ve orta kademe organik, ancak daha canlı bir tona bürünerek çok daha fazla body duymamızı sağladı ve amfilerimiz daha önce harika olmasına rağmen çok önemli bir gelişme oldu. Konuşmacılar ortadan kayboldu; Yine de, enstrümanlar uygun boyut ve belirli ses sahnesi konumlarına daha fazla odaklandı. Sonuç olarak, çok daha iyi bir ses, çok daha gelişmiş bir deneyim, dinleyen herkes tarafından kolayca, hemen duyuldu.Özellikler ve Teknik ÖzelliklerKrell iBias Teknolojisine Sahip 300 Watt AmplifikatörTeknik ÖzelliklerFrekans tepkisi20 Hz - 20 kHz +0, -0,13 dB0,5 Hz - 100 kHz +0, -3 dBSinyal-gürültü oranı>98 dB, geniş bant, ağırlıksız, tam güç çıkışına atıfta bulunulan>116 dB, "A" ağırlıklıKazanç26,2 dBToplam harmonik bozulma<1 kHz'de %0,045, 400 W'ta, 20 kHz'de %8 Ω<0,17, 400 W'da, 8 ΩGiriş EmpedansıTek uçlu: 100 kΩBalanlı: 200 kΩGiriş hassasiyetiTek uçlu veya dengeli: 2,4 V RMSÇıkış gücü8 Ω'da 300 W RMS4 Ω'de 540 W RMSÇıkış voltajı138 V tepeden tepeye49 V RMSÇıkış akımı16 A tepehızı40 V/μsÇıkış empedansı<0,017 , 20 Hz - 20 kHz Sönümleme faktörü >470, 20 Hz - 20 kHz, 8 Ω olarak adlandırılırGüç tüketimiBekleme: 4 WIdle: 180 WMaksim: 1600 WIsı çıkışıBekleme: 13,7 BTU/saat. Boşta: 615 BTU/saat. Maksimum: 5677 BTU/saat.Girişler2 RCA konektörü ile tek uçlu2 XLR konektörü ile dengeliÇıkışlar2 çift bağlama direğiBoyutlar17.1 inç. G x 7,65 inç Y x 21,10 inç D434 mm G x 194 mm Y x 536 mm DAğırlık80 lb., 3,64 kg (nakliye)70 lb., 31,8 kg (yalnızca birim)
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