Instruction/ maintenance manual of the product CQ-2 Meyer Sound
Go to page of 16
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.
An important point after buying a device Meyer Sound CQ-2 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Meyer Sound CQ-2 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Meyer Sound CQ-2 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Meyer Sound CQ-2 you will learn all the available features of the product, as well as information on its operation. The information that you get Meyer Sound CQ-2 will certainly help you make a decision on the purchase.
If you already are a holder of Meyer Sound CQ-2, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Meyer Sound CQ-2.
However, one of the most important roles played by the user manual is to help in solving problems with Meyer Sound CQ-2. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Meyer Sound CQ-2 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
