Source: Press Release, Last Accessed: 2016/12/14

Last year Audio Analogue celebrated its twentieth birthday with a new, contemporary edition of the company’s first ever product, the Puccini integrated amplifier. Now, the Italian brand has given another of its much-loved classics the Anniversary treatment: the once-flagship Maestro.
The original Maestro integrated amplifier was created in 2001, a hulk of an amp at 52kg and with huge power reserves. The Maestro range was later expanded to include a line stage, monoblocks and 24/192 CD player, while the original integrated amp enjoyed two subsequent upgrades in the form of the Maestro Settanta and Maestro Settanta Rev 2.0.
According to the press release, the basic design of the Maestro Anniversary is very similar to that of the Puccini but with two important differences. First, the amplification chain is fully balanced from input to the output stage, only becoming unbalanced to connect to the speakers. Second, while the Puccini uses feedback in the preamp stage, in the Maestro all stages are without global feedback. What’s more, the Maestro Anniversary extends the dual-mono design further to include the power supply: left and right channels not only have their own separate grounds but also their own dedicated 600 watt mains transformers. The separate output stages use four pairs of power transistors per channel, enabling the amp to deliver 150 watts into 8 ohms, rising to a whopping 500 watts into 2 ohms – easily enough to drive the most challenging of loudspeakers.
The amp’s circuitry is highly refined, with as much attention having been given to the selection of materials as to its design - and all informed by extensive listening tests. Military-standard resistors, custom-made polypropylene audio grade capacitors, 7N OCC copper internal wiring and pure copper output connectors are widely used. Moreover, the routing of the PCB was carefully studied to optimize the signal paths and to maintain the symmetry of the stages, while the use of heavy pure copper tracks (double the standard thickness) enables improved power delivery.
As with the power amp’s circuits, the preamplifier is also fully dual-mono. Immediately behind the input connectors, switching relays route the signal to a discrete components buffer to isolate the amplifier from the source. The volume control, like that of the Puccini, is of the highest quality, most pure form possible: a resistor ladder. Following the volume control stage, the preamp amplifies up to about 12dB. Each of the Maestro Anniversary’s three key elements - power supply, preamplifier and power amp - is physically housed on three separate boards which, to all intents and purposes, is akin to having three independent components.

For more information: http://www.audioanalogue.com/

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