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AUDIO ANALOGUE
maestro
STEREO LINE PREAMPLIFIER
OWNER’S MANUAL
MANUALE D’ISTRUZIONI
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2
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3 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 wit
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4 PREMESSA AUDIO ANALOGUE non accetta responsabilità nei casi in cui: Le procedure operative di utilizzo e manutenzione dell’apparato descritte nel manuale non siano rispettate. I danni si verifichino in seguito a riparazioni o modifiche dell’apparato eseguite da personale non autorizzato o a seguito di normale deterioramento dell’apparato. Nessuna parte del presente manuale può essere riprodotta con alcun mezzo, trasmessa o copiata per usi pubblici e/o privati senza la previa autor
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5 Dear Audiophile, Congratulations and thank you for choosing Maestro Line Preamplifier. You’re now the owner of a unit that establishes a new reference in the category of high-quality and high-versatility stereophonic products. Maestro Line Preamplifier provides circuital solutions with no compromises and features capable to satisfy advanced users’ demands. We built our preamplifier with high-performance circuits, separated circuit sections for each channel, function-based and channel- bas
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6 Features Double-chassis to separate the line section from the digital and power supply section. 400Hz synthesis system analogical power supply with two thoroidal resistors and two different power lines for each channel. Thoroidal transformer digital power supply. Power plug for external phono amplifier. Analogical circuits with separated components, large pass band and low counter-reaction. Highest-quality passive components; lowest-tolerance metallic-layered resisters (MIL standard);
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7 34 34 9 9 1 1 78 78 2 2 65 65 Front panel 1) Multifunctional and input selector. It allows choosing the sound source visualizing it on the display. It also allows sending the sound source to the tape out and modifying set-up settings. 2) Volume control. Fading level is shown on the display. 3) “Tape” button. When this button is pressed, the input selector works as tape bar selector. On the display is shown the source available on the analogical tape out. When the button is released
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8 Chassis A back panel 1) IEC standard power inlet. Connect here the provided power cord. 2) Fuses(T2A). 3) RS-232 serial port. 4) 25-pin connector for digital control signals. 5) Power plug for external phono amplifier. 6) 4-pin XLR connector for left analogic power supply. 7) 4-pin XLR connector for right analogic power supply. Chassis B back panel 1) 25-pin connector for digital control signals. 2) 4-pin XLR connector for left analogic power supply. 3) 4-pin XLR connector fo
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9 Descrizione del pannello posteriore telaio A 1) Presa di rete a norma IEC. Collegare il cavo di alimentazione di rete fornito in dotazione. 2) Fusibili(T2A). 3) Porta seriale RS-232. 4) Connettore a 25 poli per i segnali digitali di controllo. 5) Presa di alimentazione per amplificatore phono esterno. 6) Connettore XLR a 4 poli per alimentazione analogica left. 7) Connettore XLR a 4 poli per alimentazione analogica right. Descrizione del pannello posteriore telaio B 1) Connet
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10 Remote controller 1) “STBY”. Standby. It activates/deactivates standby mode. 2) “VOL+/VOL-“. Volume setting. 3) “MUTE”. It activates/deactivates muting 4) “IN+/IN-“. It allows source selection and navigation through the set-up. 5) “SET”. It activates the set-up. Descrizione del telecomando 1) “STBY”. Stand-by. Attiva e disattiva lo stand-by. 2) “VOL+/VOL-“. Regolazione del volume. 3) “MUTE”. Attiva e disattiva il mute. 4) “IN+/IN-“. Seleziona la sorgente per l’ascolto e permett
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11 Unpacking and checking package Carefully open the package to avoid damaging the content. The package should contain: • 1 Maestro Line preamplifier • 1 remote controller • 1 power cord • 2 AAA batteries (placed in the remote controller) • 3 connectors for sections linking (two XLR and one DB25 connectors) • 1 instruction manual If one of the items listed above is missing, please contact your Audio Analogue retailer. After extracting the smallest items from the package, pull out t
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12 Plugging and connecting Maestro Line Preamplifier First of all, you have to link the two sections of the unit using the three provided connectors. Before connecting Maestro Line Preamplifier to the sound source and to the amplifier, please be sure that all the units are unplugged from wall outlets. Connect the sources to the Maestro Line Preamplifier inputs you want to use. Please use only high-quality cords with gold/rhodium-plated connectors. Connect Maestro Line preamplifier pre out
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13 Volume settings and silencing (mute) The volume knob on the front panel and the Vol+/Vol- buttons on the remote controller change the general sound level. It means that the volume of the two channels is altered identically. It is possible to modify the relative level of each channel changing the balance option in the setup. The mute buttons on the front panel and on the remote controller allows lowering the sound level by 20dB. In normal sound level condition, it means to pass to a backg
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14 Notes on inputs bypassing Set-up has an option that allows sending the input signal to the outputs to bypass the amplifier when the unit is in stand- by mode. It is possible to choose among the 8 available outputs. This option is useful when you want to integrate the preamplifier into a multi-channel system, so that you can connect it to high-quality stereophonic sources while connecting the multi-channel processor to audio/video sources. Note sul by-pass degli ingressi E’ disponibil
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15 Set-up navigation Due to the reduced size of the display, only one option at a time is shown. Use the remote controller to navigate through the different options, to choose the desired one and also to modify the parameters value. To select the desired option, repeatedly press the “SET UP” button on the front panel or the “SET” button on the remote controller. It is possible to modify the parameters of the selected option by rotating the left selector on the front panel or pressing the
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16 Specifications In/out configuration Parameter Measurement conditions Value Channels: - 2 Unbalanced input Line gain 20Hz-20kHz 12dB Unbalanced output Frequency response: Attenuation –10dB <10Hz-115kHz +0/-1dB Attenuation –20dB <10Hz-80kHz +0/-1dB Attenuation –30dB <10Hz-30kHz +0/-1dB Noise level: Attenuation 0dB 125dB under 1V Band limits 0Hz-48kHz Signal/noise ratio: 22Hz-22kHz 80dBV Balanced input Line gain 20Hz-20kHz 6dB Unbalanced output Frequency respons
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17 Specifiche Tecniche Configurazione in/out Parametro Condizioni di misura Valore Numero di canali: - 2 Ingresso sbilanciato Guadagno stadio linea 20Hz-20kHz 12dB Uscita sbilanciata Risposta in frequenza Attenuazione –10dB <10Hz-115kHz +0/-1dB Attenuazione –20dB <10Hz-80kHz +0/-1dB Attenuazione –30dB <10Hz-30kHz +0/-1dB Livello di rumore Attenuazione 0dB 125dB sotto 1V Limiti di banda 0Hz-48kHz Rapporto segnale/rumore 22Hz-22kHz 80dBV Ingresso bilanciato Guadagno
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18 TROUBLESHOOTING Symptom Cause Remedy Display is off Power cord incorrectly plugged Make sure the power cord is correctly No sound plugged into the amplifier and into the wall outlet Burned-out fuses Check fuses in the fuse panel (after unplugging the power cord from the wall outlet) above the IEC power inlet and replace them with new ones of the same type Display is on Volume knob completely rotated anti- Rotate the volume knob clockwise No sound clockwise Faulty or incorrect
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19 RICERCA GUASTI Sintomo Causa Rimedio Display spento Cavo di alimentazione non Controllare che il cavo di Nessun suono correttamente collegato alimentazione sia ben inserito nell’amplificatore e nella presa di rete Fusibili di rete bruciati Controllare i fusibili nel portafusibili (dopo aver staccato il cavo dalla presa di rete) sopra la presa IEC ed eventualmente sostituire con altri dello stesso tipo Display acceso Manopola del volume ruotata in senso Ruotare la manopola in se
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20 AUDIO ANALOGUE Head Office Ufficio commerciale: Via C. Bottai, 88B - 51015 Monsummano Terme (PT) Italy tel. 0572 954513 fax 0572 954010 R&D Laboratory Laboratorio ricerca e sviluppo: Via XX Settembre, 47 - 56017 San Giuliano Terme (PI) Italy www.audioanalogue.com - info@audioanalogue.com
