SWR Soundメーカー750の使用説明書/サービス説明書
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POWER 750 OWNER’S MANUAL SWR • CORONA, CA • USA.
2 • POWER 750 IMPORT ANT SAFETY INSTRUCTIONS CAUTION: TO REDUCE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE CO VER OR BAC K. NO USER-SERVICEABLE P AR TS INSIDE. PLEASE REFER TO A QUALIFIED SERVICE TECHNICIAN. A. Read Instructions: All safety and operation instructions should be read before the product is operated.
POWER 750 • 3 INTRODUCTION Congratulations on your purchase of the SWR P ower 750! Y ou now own one of the meanest, toughest and loudest power amps ever made specifi- cally for bass guitar. Bassists have a unique burden when it comes to power , because it takes considerably more power to amplify lower frequencies than it does for higher ones.
4 • POWER 750 750 W atts @ 4 ohms 450 W atts @ 8 ohms (minimum load = 2.6 ohms) INPUT IMPEDANCE: Balanced = 1 0K ohms Unbalanced = 33K ohms OUTPUT IMPEDANCE: Slave Output = 1 00 ohms SENSITIVITY : 1 .582 VRMS LOAD CAP ABILITY : 2.6 ohms to infinity NOISE: Residual = <.
POWER 750 • 5 USING TWO SPEAKER CABINETS Connect the speaker cables of your choice (1/4" or Speakon) from the speaker out jacks on your Power 750 to the inputs on speaker cabinets. Can you use one 1/4" output jack and a Speakon output jack at the same time? Y es.
6 • POWER 750 FRONT P ANEL FEA TURES RACK HANDLES The rack handles were chosen for comfort while carr ying your Power 750 from place to place. They will also protect the front panel controls in the event the unit is dropped on its face. In some types of racks, the handles may need to be removed before installation.
POWER 750 • 7 GROUND LIFT A ground lift is provided for the Balanced Inputs. In the normal (out) position of the push switch, Pin 1 on the XLR connector is grounded. In the Lift (in) position, the ground on Pin 1 is disconnected. When using the Balanced Inputs, always be aware of the position of the ground lift switch.
8 • POWER 750 Here's another formula: T o figure out the total impedance of two or more cabinets of equal value hooked up in parallel, divide the impedance of one cabinet by the number of cabin.
POWER 750 • 9 SPEAKER CABLE The speaker cable you use to connect your SWR system should be made of at least 18 gauge wire, and heavier if possible. (The thicker the wire, the lower the gauge, so 1 8 gauge is heavier than 20 gauge, 1 6 gauge is better than 1 8 gauge, and so on.
10 • POWER 750 RACK MOUNTING INSTRUCTIONS T o preserve the beauty and reliability of your amplifier, we recommend that you install your amplifier in a rack case. The Pow er 750 is completely ready to be rack mounted and needs no additional parts or accessories other than the rack screws and the case itself.
POWER 750 • 11.
POWER 750 LIMITED WARRANTY The POWER 750 fr om SWR is war ranted to the original consumer pur chaser for TWO YEARS from the date of pur chase against defects in materials and workmanship, pr ovided that it is pur - chased fr om an Authorized SWR dealer .
デバイスSWR Sound 750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:
SWR Sound 750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SWR Sound 750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。SWR Sound 750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。SWR Sound 750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。
SWR Sound 750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SWR Sound 750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、SWR Sound 750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SWR Sound 750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。