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Home
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Solid State Power Amplifiers
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Marantz
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Marantz Model 240 Endstufe
Marantz Model 240
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Posted On
7.05.2025
Last Update On
7.05.2025
Description
Original Description is in
German
, other language texts are translations and can contain errors.
English
Deutsch
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Turkish
The Marantz Model 240 is a stereo power amplifier that was produced from 1972 to 1977. It is based on the Marantz 250, but does not use the VU meters.
The device delivers an output power of 120 watts per channel at 8 ohms. The frequency response ranges from 2 Hz to 100 kHz, and the harmonic distortion is a maximum of 0.1%. The attenuation factor is 100, the input sensitivity is 1.5 V, and the signal-to-noise ratio is 106 dB. The dimensions are 15-3/8 x 6-1/8 x 9-1/2 inches, and the weight is around 26 pounds.
The power amplifier has a fully balanced design with differential amplifiers and continuous direct current coupling (OCL circuit). Carefully selected transistor pairs ensure precise DC balance. In order to minimise distortion at low levels, the power amplifier operates with a sufficiently high quiescent current in Class AB mode. Separate boards for the individual amplifier stages and a robust ground guide contribute to stability. The power supply is provided by two 60V/20,000 μF electrolytic capacitors.
audio-database.com
The Marantz 240 was manufactured in the USA and is known for its reliability and durability. It is particularly suitable for use with high-quality preamplifiers such as the Marantz 3300 or 3600.
Die Marantz Model 240 ist eine Stereo-Endstufe, die von 1972 bis 1977 produziert wurde. Sie basiert auf der Marantz 250, verzichtet jedoch auf die VU-Meter.
Das Gerät liefert eine Ausgangsleistung von 120 Watt pro Kanal an 8 Ohm. Der Frequenzgang reicht von 2 Hz bis 100 kHz, und der Klirrfaktor beträgt maximal 0,1 %. Der Dämpfungsfaktor liegt bei 100, die Eingangsempfindlichkeit bei 1,5 V, und das Signal-Rausch-Verhältnis beträgt 106 dB. Die Abmessungen betragen 15-3/8 x 6-1/8 x 9-1/2 Zoll, und das Gewicht liegt bei etwa 26 Pfund.
Die Endstufe verfügt über einen vollständig symmetrischen Aufbau mit Differenzverstärkern und einer durchgängigen Gleichstromkopplung (OCL-Schaltung). Sorgfältig ausgewählte Transistorpaare sorgen für eine präzise Gleichstrombalance. Um Verzerrungen bei niedrigen Pegeln zu minimieren, arbeitet die Endstufe im Class-AB-Betrieb mit ausreichend hohem Ruhestrom. Separate Platinen für die einzelnen Verstärkerstufen und eine robuste Masseführung tragen zur Stabilität bei. Die Stromversorgung erfolgt über zwei 60V/20.000 µF-Elkos.
audio-database.com
Die Marantz 240 wurde in den USA gefertigt und ist für ihre Zuverlässigkeit und Langlebigkeit bekannt. Sie eignet sich besonders für den Einsatz mit hochwertigen Vorverstärkern wie dem Marantz 3300 oder 3600.
El Marantz Modelo 240 es un amplificador de potencia estéreo que se produjo entre 1972 y 1977. Se basa en el Marantz 250, pero no utiliza los medidores VU.
El dispositivo ofrece una potencia de salida de 120 vatios por canal a 8 ohmios. La respuesta de frecuencia oscila entre 2 Hz y 100 kHz, y la distorsión armónica es de un máximo del 0,1%. El factor de atenuación es de 100, la sensibilidad de entrada es de 1,5 V y la relación señal-ruido es de 106 dB. Las dimensiones son 15-3/8 x 6-1/8 x 9-1/2 pulgadas, y el peso es de alrededor de 26 libras.
El amplificador de potencia tiene un diseño totalmente equilibrado con amplificadores diferenciales y acoplamiento continuo de corriente continua (circuito OCL). Los pares de transistores cuidadosamente seleccionados garantizan un equilibrio de CC preciso. Para minimizar la distorsión a niveles bajos, el amplificador de potencia funciona con una corriente de reposo suficientemente alta en el modo de clase AB. Las placas separadas para las etapas individuales del amplificador y una robusta guía de tierra contribuyen a la estabilidad. La fuente de alimentación es proporcionada por dos condensadores electrolíticos de 60V/20.000 μF.
audio-database.com
El Marantz 240 se fabricó en Estados Unidos y es conocido por su fiabilidad y durabilidad. Es especialmente adecuado para su uso con preamplificadores de alta calidad como el Marantz 3300 o 3600.
Marantz Model 240, 1972'den 1977'ye kadar üretilen bir stereo güç amplifikatörüdür. Marantz 250'ye dayanmaktadır, ancak VU sayaçlarını kullanmaz.
Cihaz, 8 ohm'da kanal başına 120 watt çıkış gücü sağlar. Frekans tepkisi 2 Hz ila 100 kHz arasında değişir ve harmonik bozulma maksimum %0,1'dir. Zayıflama faktörü 100, giriş hassasiyeti 1,5 V ve sinyal-gürültü oranı 106 dB'dir. Boyutlar 15-3 / 8 x 6-1 / 8 x 9-1 / 2 inç ve ağırlık yaklaşık 26 pound.
Güç amplifikatörü, diferansiyel amplifikatörler ve sürekli doğru akım kuplajı (OCL devresi) ile tam dengeli bir tasarıma sahiptir. Özenle seçilmiş transistör çiftleri hassas DC dengesi sağlar. Düşük seviyelerde bozulmayı en aza indirmek için, güç amplifikatörü AB Sınıfı modunda yeterince yüksek bir hareketsiz akımla çalışır. Bireysel amplifikatör aşamaları için ayrı panolar ve sağlam bir topraklama kılavuzu stabiliteye katkıda bulunur. Güç kaynağı, iki adet 60V/20.000 μF elektrolitik kondansatör tarafından sağlanır.
audio-database.com
Marantz 240 ABD'de üretilmiştir ve güvenilirliği ve dayanıklılığı ile bilinir. Marantz 3300 veya 3600 gibi yüksek kaliteli ön amplifikatörlerle kullanım için özellikle uygundur.
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