Meyer SoundメーカーCQTM Seriesの使用説明書/サービス説明書
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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.
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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.
デバイスMeyer Sound CQTM Seriesの購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Meyer Sound CQTM Seriesをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはMeyer Sound CQTM Seriesの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Meyer Sound CQTM Seriesの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Meyer Sound CQTM Seriesで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Meyer Sound CQTM Seriesを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はMeyer Sound CQTM Seriesの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Meyer Sound CQTM Seriesに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちMeyer Sound CQTM Seriesデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
