MA-i Series Power Amplifiers Amplificateurs de puissance

Leistungsendstufen Amplificadores de potencia

 

 

 

4 Software Control

4 Contrôle par programme

4Software-Steuerung

4Control del software

Figure 4.6 MA-i Load Monitoring Panel

Figure 4.6 Panneau de délestage de charge MA-i

4.6 Continuous Load Monitoring

See Figure 4.6. The load supervision feature allows real- time monitoring of the load connected to each amplifier channel. When enabled, the MA-i continuously monitors the amplifier output voltage and current when there is sufficient output, and calculates the long-term average load impedance. The measured load impedance is compared against the user-defined high and low limits. If either limit is exceeded, the status indicator and, if enabled, the System Architect Error Reporting functions alert the user of the problem. There are six controls and two indicators for each channel:

Enable: Enables or disables the load-supervision func- tion.

Testing Indicator: This indicator is active when the am- plifier output signal is sufficient to allow load impedance

calculation and test verification.

Load Status Monitor: Indicates the result of the last test.

Average Impedance Monitor: Reports the actual calculated average load impedance in ohms. Its range is from 0 ohms to 250 ohms.

High Limit: Sets the upper bound above which the system will report a “high” error status.

Low Limit: Sets the lower bound below which the system will report a “low” error status.

Nominal Impedance: Sets the expected average impedance for the connected load. This value deter- mines the output signal level required for the test. This parameter is also used by the average power limiter to determine the expected power threshold.

Report Errors Via Network: Enables Error Report- ing to send an error report via the network so that high and low load conditions are reported to the controlling software.

4.6 Délestage de la charge continue

Reportez-vous à la Figure 4,6. La fonction de délestage de la charge permet un délestage en temps réel de la charge connectée à chaque canal de l’amplificateur. Lorsqu’il est activé, le MA-I surveille de manière continue la tension de sortie de l’amplificateur ainsi que le courant lorsque la sortie est suffisante, puis calcule l’impédance de charge moyenne à long terme. L’impédance de charge mesurée est comparée aux limites hautes et basses définies

par l’utilisateur. Si l’une ou l’autre limite est dépassée, l’indicateur de statut et, si elles sont activées, les fonctions de signalisation d’erreur de HiQnet, alertent l’utilisateur sur le problème. Chaque canal comprend six commandes et deux indicateurs :

Activer : Active ou désactive la fonction de délestage de la charge.

Indicateur de test : Cet indicateur est actif lorsque le signal de sortie de l’amplificateur est suffisant pour permettre le calcul de l’impédance de la charge et la vérification du test.

Surveillance du statut de la charge : Indique le résultat du dernier test.

Surveillance de l’impédance moyenne : Signale l’impédance de charge moyenne réelle calculée en ohms. Les valeurs sont comprises entre 0 ohms et 250 ohms.

Limite haute : Définit la limite supérieure au-dessus de laquelle le système signale un statut d’erreur « haut ».

Limite basse : Définit la limite inférieure au- dessous de laquelle le système signale un statut d’erreur « bas ».

Impédance nominale : Définit l’impédance moyenne pour la charge connectée. Cette valeur détermine le niveau du signal de sortie requis pour le test. Ce paramètre est également utilisé par le limiteur de puissance moyenne afin de déterminer le seuil de puissance prévu.

Signalisation d’erreurs via le réseau : L’activation de la signalisation d’erreur permet d’envoyer un rapport d’erreur via le réseau afin que les conditions de charge haute et basse soient signalées au logiciel de commande.

Operation Manual Mode d’emploi Bedienungsanleitung Manual de Operación

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Harman MA12000i, MA9000i, MA5000i Continuous Load Monitoring, Enable Enables or disables the load-supervision func- tion

MA12000i, MA9000i, MA5000i specifications

The Harman MA5000i, MA9000i, and MA12000i are part of Harman's premium line of integrated amplifiers, designed to deliver high-fidelity audio reproduction with cutting-edge technology and features. Each model integrates aspects of engineering excellence to provide an immersive listening experience that caters to audiophiles and casual listeners alike.

The Harman MA5000i serves as an elegant entry point into the series, packing a punch with 50 watts per channel into 8 ohms and 80 watts into 4 ohms. This amplifier provides a clean, powerful sound with low distortion levels, ensuring that the audio remains faithful to the original recording. The MA5000i features seamless connectivity options including Bluetooth, USB, and analog inputs, allowing users to easily integrate various audio sources. Harman's proprietary audio technology is evident in the dynamic range and clarity that this model can reproduce, making it an excellent choice for small to medium-sized listening environments.

Stepping up, the MA9000i elevates the audio performance further with 100 watts per channel into 8 ohms and 150 watts into 4 ohms. This model is equipped with advanced technologies such as Harman's unique Adaptive Signal Processing, which optimizes sound based on listener preferences and room acoustics. The MA9000i also incorporates a high-resolution digital-to-analog converter (DAC) that enhances playback quality from digital sources. With its extended frequency response and substantial power, this amplifier is adept at driving a wider range of speakers, making it suitable for larger spaces.

At the pinnacle of this series, the Harman MA12000i delivers an astonishing 200 watts per channel into 8 ohms and 300 watts into 4 ohms, tailored for the most demanding audio setups. This amplifier showcases Harman’s latest advancements in audio engineering, including a state-of-the-art power supply and efficient cooling technology that maintains performance even under heavy loads. The MA12000i is built with premium components, ensuring reliability and longevity. Its versatility in connectivity includes multiple digital inputs, analog inputs, and streaming capabilities, making it the ideal hub for a modern home audio system.

Each of these amplifiers embodies Harman’s commitment to innovation and quality sound, providing users with a range of options to suit any audio preference or environment. From the compact but powerful MA5000i to the high-end MA12000i, these amplifiers promise to deliver an exceptional audio experience, elevating the standard for home entertainment systems.