Manuel d'utilisation / d'entretien du produit Dual Monaural Power Amplifier du fabricant Madrigal Imaging
Aller à la page of 20
17 Operating Manual Mark Levinson ® N º 29 Dual Monaural Power Amplifier Madrigal Audio Laboratories, Inc..
18 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
19 Important safety instructions Please read all instructions and precautions carefully and completely before operating your N º 29 Dual Monaural Power Amplifier. 1. ALWAYS disconnect your entire system from the AC mains before connecting or disconnecting any cables, or when cleaning any component.
20 Thank you for choosing the Mark Levinson ® N º 29 Dual Monaural Power Amplifier. A great deal of effort went into the design and construction of this precision device.
21 T able of c on t en ts Unpacking and placement ....................................................................... 1 Unpacking ................................................................................................. 1 Placement .......
1 Unpacking and placement Unpack your Nº29 amplifier and keep all packing materials for future transport. To avoid damaging the connectors on input cables attached to the rear panel, NEVER rest the Nº29 on the rear panel, and NEVER tip it back in a way that would put stress on these connectors.
2 V olt ag e se lec tion The Nº29 is factory-set (internally) for 100V, 120V, 200V, 220V, or 240V AC mains operation. Check that the label on the rear panel of the amplifier indicates the correct AC operating voltage for your location. Nº 29 DUAL MONAURAL AMPLIFIER + –– + SERIAL NO.
3 Signal connections The N º 29 incorporates RCA-type and XLR-type connectors for audio signal input. The Madrigal-designed RCA-type connectors used for single-ended audio interconnection are a great improvement over ordinary RCA- type connectors.
4 Inverting operation should be used if a phase reversal is required. In this mode of operation, the output signal of the amplifier will be 180 ° out of phase with the input signal. This may be required if one component in the system inverts the signal and absolute phase at the loudspeaker is desired.
5 If your preamplifier is equipped with a balanced main output, it's best to wire the N º 29 for balanced operation, particularly if long cable lengths are required between the preamplifier and the N º 29. (See Figure 3 for the pin assignments of the N º 29's XLR-type inputs.
6 Speaker connections NEVER connect the N º 29's output terminals to any device other than a loudspeaker. NEVER short-circuit the amplifier output terminals.
7 3. Strip 1/2" of insulation from the speaker cable. 4. Gently slide the (5/8") bare end of the 14-gauge wire into the center of the bare speaker cable (be careful not to spread the individual wires of the speaker cable). 1/2" (12.7mm) Speaker cable Solder Ti n Figure 7B: Pigtail connection 5.
8 Power connection After making your loudspeaker connections, apply power to your preamplifier and allow it to stabilize. (Mark Levinson preamplifiers, for example, require about one minute to stabilize.) Connect the AC power cord (included in the accessory pack) to the AC connector on the rear panel of the N º 29, then to the AC mains outlet.
9 Bridged operation When greater power output is desired, the N º 29 may be bridged for monophonic operation into load impedances of at least 2 Ω . Note: Make sure the loudspeaker is rated to handle high power levels. For example, a bridged N º 29 driving an 8 Ω loudspeaker is capable of delivering 200W RMS.
10 Figure 10: Balanced bridging cable 21 3 21 3 Signal ground (shield) Left-channel XLR male line-mount (rear view) Twisted pair Right-channel XLR male line-mount (rear view) 12 3 XLR female line-mount (rear view) Twisted pair Signal ground (shield) 2.
11 2. Connect the bridging cable between the left- and right-channel XLR-type input connectors, taking care to insert the correct cable end into its designated channel. You may fabricate such a cable according to Figure 12; it's also available through your Mark Levinson dealer as part of a single-ended bridging kit.
12 Car e an d m ain t e n an c e To remove dust from the cabinet of the N º 29, use a feather duster. To remove dirt and fingerprints, use isopropyl alcohol applied to a soft cloth. Poor connections cause sonic degradation. We recommend, therefore, that you clean all speaker connection with denatured alcohol at least once a year.
13 Specifications The correlation between published specifications and sonic quality is unreliable. A list of numbers reveals virtually nothing. All technical measurements must be subject to qualitative as well as quantitative interpretation. Measurements of the N º 29 yield excellent results by any standards.
14 Dimensions 17-1/2" (444.5) 1-3/4" (44.5) 1-3/32" (27.5) 3/8" (9.5) 4-1/8" (104.8) 14-3/16" (360.4) 29/32" (23.0) 1-9/16" (39.7) 4-29/64" (1 13.1) 1" TYP . (25.4) 1-7/16" TYP . (36.5) 1/8" (3.
16 630042-1 Printed in U.S.A. ©1993 Madrigal Audio Laboratories, Inc. All rights reserved. ® MADRIGAL AUDIO LABORATORIES 2081 South Main Street, P.O. Box 781 Middletown, Connecticut 06457 USA Telephone: (203) 346-0896 Fax: (203) 346-1540 is a registered trademark of Madrigal Audio Laboratories, Inc.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté Madrigal Imaging Dual Monaural Power Amplifier c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du Madrigal Imaging Dual Monaural Power Amplifier - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Madrigal Imaging Dual Monaural Power Amplifier, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Madrigal Imaging Dual Monaural Power Amplifier va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Madrigal Imaging Dual Monaural Power Amplifier, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du Madrigal Imaging Dual Monaural Power Amplifier.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le Madrigal Imaging Dual Monaural Power Amplifier. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Madrigal Imaging Dual Monaural Power Amplifier ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
