Manuel d'utilisation / d'entretien du produit HM-1S du fabricant Meyer Sound
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Patents Pending Operating Instructions HM-1S Self-Powered S tudio Monitor Copyright © 1998 Meyer Sound Laboratories, Inc. All rights reserved Part # 05.
2 Introduction .......................................................... 3 Power Requirements ............................................ 3 Power Cable Requirements .................................. 5 Audio Input ...................................
3 Introduction The Meyer HM-1S S tudio Monitor is a compact, full- range, self-powered reference monitor that employs a concentric tweeter mounting structure to achieve true point-source performance.
4 Power Supplies for Larger Systems If an installation includes more than 10 speakers, or requires several speakers to operate from a single 48 V line, a single, high-output power supply should be considered. The following sections provide current and voltage specifications for the HM-1S s power requirements.
5 audio interruption. In the third, and preferable case, supplies that feature voltage foldback allow brief periods of current-limit without audio interruption; for this reason, we recommend using such supplies. The HM-1S does not require tight voltage regulation and operates down to 35 V although peak SPL values are reduced.
6 HM-1S Speaker Cable The following drawings and procedures are provided as an aid in the event that the speaker cable used to connect the HM-1S to the HM-1S Subwoofer needs to be repaired or extended.
7 HM-1S to HM-1S Subwoofer Cable Connector Assembly Procedure Cable Boot Cord Connector Cable Clamp Housing Contact Pins Coupling Ring Step 1: Feed the end of the cable through the boot, cable clamp housing, and coupling ring in the order and position shown.
8 Subwoofer Performance V erification There are two methods of verifying that the phase relationship between the HM-1S and its subwoofer. One method is free field, the other is a ground plane measurement in half space.
9 This represents a typical response of the HM-1S in free-field environment, on axis at 1 meter. This measurement was performed in the large anechoic chamber at MSLI. Connect the subwoofer and measure the combined response of the system. HM-1S on axis at 1 meter , free field.
10 This represents a typical response of the HM-1S and subwoofer, in phase, in a free field environment on axis at 1 meter. This measurement was performed in the large anechoic chamber at MSLI. This response indicates a complementary phase relationship between the HM-1S and subwoofer.
11 If the subwoofer is out of phase, the combined response will have a significant loss of energy compared to the overall response at around 82 Hz as illustrated below: HM-1S with out-of-phase subwoofer on axis at 1 meter , free field.
12 This represents a typical response of the HM-1S and subwoofer out-of-phase phase, in a free field environment on- axis at 1 meter. This measurement was performed in the large anechoic chamber at MSLI. If your system response indicates a phase reversal please contact Meyer Sound Technical Support for assistance.
13 This represents a typical ground-plane response of the HM-1S, on-axis at 1 meter. Keep in mind that any surface close to the test space can create reflections which will change the response of the speaker. Connect the subwoofer to the HM-1S and measure the combined response of the system.
14 HM-1S with in-phase Subwoofer on axis at 1 meter , ground plane. This represents a typical ground-plane response of the HM-1S and subwoofer, in phase, at 1 meter. This response indicates a complementary phase relationship between the HM-1S and subwoofer.
15 HM-1S with out-of-phase Subwoofer on axis at 1 meter , ground plane. If the subwoofer is out of phase the combined response will have a significant loss of energy compared to the overall response a.
16 Cooling and Fan Installation The HM-1S depends on natural convection to cool the heatsinks that absorb heat from the amplifiers and radiate the heat into the surrounding air space. Natural convection requires free air in back of, and underneath the HM-1S to allow air to flow up over the heatsinks.
17 T o reduce the risk of electric shock, disconnect the loud- speaker from the AC adapter before installing audio cable. Reconnect the adapter only after making all signal con- nections. Connect the AC adapter to a two-pole, three wire grounding mains receptacle.
18 Meyer Sound Laboratories, Inc. 2832 San Pablo Avenue Berkeley, California 94702 Telephone: 510 - 486 - 1166 FAX: 510 - 486 - 8356 E-mail: techsupport@meyersound.
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 Meyer Sound HM-1S 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 Meyer Sound HM-1S - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Meyer Sound HM-1S, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Meyer Sound HM-1S va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Meyer Sound HM-1S, 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 Meyer Sound HM-1S.
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 Meyer Sound HM-1S. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Meyer Sound HM-1S 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.
