Audio Analogue Maestro Anniversary RR (Resistance Relay)

Anniversary Line designed by AIRTECH - Amplificateur

The Maestro Anniversary has seen the light of day in the AIRTECH laboratories and draws on the experience gained during the development of the Puccini Anniversary. The basic schematics of these two models are very similar, but with one significant difference: the amplification circuit of the Maestro is totally symmetrical from the entry level to the power level and asymmetrical on the connection with the enclosures. This has led to a doubling of the amplification and attentuation levels (potentiometers). All stages of the Maestro Anniversary have been designed without a global counter-reaction, even on the pre-amplification stage (and this is also the case on the Puccini). The output power has been set to 150 W below 8Ω, which has an impact on the dimensioning of all additional stages and the power now comprises two pairs of transistors per channel. La configuration de base est une cascode inversée similaire à un étage unique de gain suivi par un buffer de sortie. The stability of the operating point is ensured by a servo relay with continuous current which only intervenes at frequencies below a few dizaines of Hz (i.e. very close to the audible spectrum). The improvement of the circuits and the choice of high quality components (resistance to military standard condensers made of audiophile quality polypropylene designed for AIRTECH's OCC 7N internal cuivre cable and pure cuivre sorting ports) have resulted in an amplifier that has the honor of succeeding the superb integrated Maestro. In fact, it will complete the Anniversary range celebrating the fifteenth anniversary of the existence ofAudio Analogue and the fifteenth anniversary of the launch of the very first AUDIO ANALOGUE baptized Maestro. The new Maestro Anniversary is an amplifier exclusif par sa puissance remarquable encore doublée lorsque l'impédance est divisée par deux et par son extraordinaire aptitude à tenir les charges complexes cela s'ajoutant à une musicalité et un raffinement extrêmes très peu habituels dans l'univers des amplificateurs " musclés ". However, these words are not enough to express all the features and characteristics of this device, which is why we invite you to come and check it out as soon as possible, the only way to verify it for yourself and to exclude yourself: "MUSIQUE MAESTRO !!!"

L'amplificateur a été intégralement conçu sur le principe de trois sous-ensembles bien séparés. 1. Puissance. Le Maestro dispose d'un transformateur de 600 VA par canal. The redressement pont is equipped with ultrarapid diodes with a discreet 50 A each. La capacité de filtrage est de 16800 μF par branche de sorte que la capacité totale de l'amplificateur atteint 67200μF. During the mise en fonction le courant d'appel est limité par le moyen de résistances de valeur variable avec la température qui dès le processus de mise en fonction achevé sont mises hors service vis-à-vis des circuits de signaux. 2. amplification. There are two amplifiers (for the left and right channels) totally separated between them for the ground and for the power supply connections without any common connection. The circuits of the volume control microprocessor are themselves optically isolated. It is therefore a double mono integral configuration. The cuivre pistes of the imprinted circuits are double-coupled compared to the usual standards in order to ensure the good circulation of important currents. The tracé des pistes des circuits imprimés été finement étudié pour optimiser le transfer des signaux audio et garantir une parfaite symétrie entre les étages. 3. preamplification. Tout comme sur la partie puissance les circuits de preamplification sont eux aussi en double mono. Just in front of the power supply, there are relays for switching the channels and a buffer with discreet components to allow the source amplifier to be isolated. The maximum input voltage is in the order of 6 V RMS. The symmetrical buffers for the inputs and outputs have been dimensioned for class A powering of the four microprocessors (per channel) controlling the volume. As on the Puccini, the latter is simply made up of a single resistance port without the slightest operational amplifier. This choice makes it possible to avoid all recourse to counter-reaction on the Maestro's circuits. The preamplifier, which can amplify the signal up to 12dB, is located on the upper level of the volume control. The three sous-ensembles described below are located on separate, isolated circuits, which means that there is a separate power supply, preamplifier and power amplifier.