Manuale d’uso / di manutenzione del prodotto CQ-2 del fabbricante Meyer Sound
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Patents Pending The CQ ™ Series self-powered loudspeakers contain independent amplifier and control electronics for one 15” bass-reflex cone driver and one 4” diaphragm horn driver in a compact enclosure. This integrated design eliminates amplifier racks, simplifies setup and installation, an d improves durability and reliability.
2 ! Pour indiquer les risques résultant de tensions dangereuses Zu die gefahren von gefährliche spanning zeigen Important operating instructions Pour indequer important instructions Zu wichtige betr.
3 Controls and Connectors .................................. 3 Dimensions ........................................................ 3 AC Power ........................................................... 4 Audio Input ...................................
4 AC Power The AC voltage operating ranges for the CQ Series are 85–134 V and 165–264 V, at 50 or 60 Hz. The CQ Series performs surge suppression for high voltage transients and can safely withstand voltages up to 275 VAC.
5 Safety Issues Pay close attention to these important electrical and safety issues. Use a power cord adapter to drive the CQ from a standard 3-prong outlet ( NEMA 5-15R; 125 V max). earth ground chassis ground The CQ requires a grounded outlet. Always use a grounding adapter when connecting to ungrounded outlets.
6 Limiting and Protection Circuitry TruPower Limiting ™ System Conventional limiters assume that the resistance of a speaker remains constant and set the limiting threshold by measuring voltage only.
7 Fans and Cooling System The CQ uses a forced-air cooling system with two fans to prevent the amplifiers from overheating. A variable- speed primary fan runs continuously with an inaudible operating noise of 22 dBA at 1 m at its slowest speed. The speed of the primary fan begins increasing when the temperature of the heatsinks reaches 4 2 ° C.
8 Complete Systems Speaker Placement and Polarity The cabinets in the following example configurations are in a close-proximity coplanar orientation, unless otherwise stated. Placing the mid-hi speaker more th a n 5 feet from the subwoofer may require setting th e speakers to opposite polarities to compensate for the propagation delay between them.
9 LD-1A with CQ and 650-P Activating the Lo Cut filter on the LD-1A for the Mid-H i output also eliminates the low frequency rise caused by the overlap between the CQ and 650-P.
10 V erifying Polarity Incorrect driver polarity impairs system performance and may damage the drivers. All Meyer Sound loudspeakers are shipped with the drivers in correct alignment.
11 Coverage Angles and Polar Plots Coverage Angles The coverage angles for the CQ Series over a wide frequency range are summarized in the following table: s e l g n A e g a r e v o C s e i r e S Q C .
12 CQ-1: 125 Hz CQ-1: 250 Hz CQ-1: 1 kHz CQ-1: 500 Hz CQ-1: 4 kHz CQ-1: 2 kHz CQ-1: 8 kHz CQ-1: 16 kHz vertical vertical vertical CQ-1 Polar Plots Inner plot is vertical unless otherwise indicated.
13 CQ-2: 4 kHz CQ-2: 2 kHz CQ-2: 125 Hz CQ-2: 1 kHz CQ-2: 500 Hz CQ-2: 250 Hz CQ-2: 8 kHz CQ-2: 16 kHz vertical vertical vertical CQ-2 Polar Plots Inner plot is vertical unless otherwise indicated.
14 Array Design Creating an effective array with the CQ requires a precise understanding of how to combine the coverage area and SPL of the individual speaker with those of adjacent speakers. Array design is a trade-off between increasing on-axis power and creating smooth transitions between the coverage areas of adjacent speakers.
15 • To reduce the risk of electric shock, disconnect the loud- speaker from the AC mains before installing audio cable. Reconnect the power cord only after making all signal connections. • Connect the loudspeaker to a two-pole, three wire ground- ing mains receptacle.
16 Complementary power MOSFET output stages class AB/H 1240 Watts (620 Watts/channel) < .02 % Acoustical Copyright © 1997 Meyer Sound Laboratories, Inc.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Meyer Sound CQ-2 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Meyer Sound CQ-2 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Meyer Sound CQ-2 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Meyer Sound CQ-2 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Meyer Sound CQ-2, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Meyer Sound CQ-2.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Meyer Sound CQ-2. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Meyer Sound CQ-2 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
