User manual AUDIO ANALOGUE MAESTRO MONO BLOCK POWER AMPLIFIER REV 1.2A

[. . . ] INTRODUCTION AUDIO ANALOGUE does not take any responsibilities in the following cases: Whenever the operational procedures related to the use and the maintenance of the equipment as described in this manual are not respected. Whenever damages to the equipment occur because of fixing and modifications made form non-authorized staff or because of normal deterioration of the system. No part of this manual can be reproduced by any means, transmitted or copied for private or public use without private authorization from AUDIO ANALOGUE. The information contained in this manual is related to the data kept by AUDIO ANALOGUE at the moment of the issue o f this publication; AUDIO ANALOGUE has the right to make changes to this document without prior notice. [. . . ] Check that the power cord is not rolled up or knotted. replace fuses with other fuses of the same type. Do not use the unit near water or any other liquid. If liquid is spilled in the unit, immediately unplug it from the wall outlet avoiding touching the unit metallic parts and contact your local dealer for checking before operating the unit. Do not put liquid containers on the unit, even when it is off. Keep the unit away from heat sources such as direct sunlight, stoves, radiators and the like. Unplug the unit from the wall outlet during light storms. Turn off and unplug the unit before cleaning it. Clean the unit with a dry and soft cloth. do not use solvents or products containing alcohol. If the amplifier is brought directly from a cold to a warm place, moisture may condense inside the unit causing malfunctioning. In this cause, please wait for at least an hour before operating the unit. Follow the local laws about material recycling and rubbish disposal. INTRODUCTION The amplifier Maestro Monoblock has been perfectly realised in every single detail in order to improve the sound performance. Many hours spent to design and simulate the new circuit's configuration, have been followed by a lot of listening tests. The target was to obtain an amplifier with balanced inputs suitable to every kind of speaker maintaining the same refinement of the amplifiers with low output power. The study of the circuit's configuration and the design of the mechanical parts have had a parallel development in order to guarantee a perfect cooling even having the heatsinks completely covered by the chassis. The basic structure of the amplifier MAESTRO MONOBLOCK is the same used in the precision balanced amplifier used in the laboratories. It is made of three different amplifiers. The first two must amplify in tension the balanced signal and the third one must supply the necessary current amplification to drive the speakers. This kind of structure has two important benefits: the first one is a disturbs high immunity, while the second one is the possibility to improve each amplification stage. The separation between the gain in tension and of the gain in current permits to realize class A tension amplifiers made with low power components, so to obtain a frequency response up to about 500kHz. [. . . ] FUSE REPLACEMENT The power amplifier is equipped with a single external fuse placed close to the IEC power inlet as described before (see "Back panel", page 11). power interruption value of the fuse is 500mA delayed for 220-240V systems and 1A delayed for 110-120V systems. Always replace the fuse with one of the same type. SPECIFICATIONS Output power (20 ­ 20000Hz, 8): 250 W Output power (20 ­ 20000Hz, 4): 400 W Output power (20 ­ 20000Hz, 2): 800 W In impedance: 47k joined in AC for each phase to the common. [. . . ]