NHTメーカーSA-2の使用説明書/サービス説明書
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SA-2 Subwoofer Amplifier Now Hear This 535 Getty Court Benicia, CA 94510 800-NHT -9993 OWNER’S MANUAL .
1. READ INSTRUCTIONS - All safety and operating instructions should be read before the appliance is operated. 2. RET AIN INSTRUCTIONS - Safety and operating instructions should be ret ained for future reference. 3. HEED W ARNINGS - All warnings on the appliance and in operating instructions should be adhered to.
Thank you for your purchase of the NHT SA-2 monaural subwoofer amplifier . Please t ake a few moments to read through this Owner ’s Manual prior to inst alling your new amplifier and/or subwoofer system. The information provided can help you to obt ain maximum performance from your audio system.
Design NHT product s are designed to deliver refined, musical sound from attractive and affordable p ackages. Our effort s are guided by the study of human hearing and are optimized for real-world use. Every NHT product undergoes rigorous testing and quality control at the factory to ensure you years of listening pleasure.
3 (A) Power Switch - T urns the unit on and off (B) Power / St atus Light - Tri-color LED: Green (On), Orange (S t andby), Red (Protect) (C) V olume Control - Adjusts the loudness of the subwoofer ind.
General Connections Caution: Prior to connecting the SA-2 to your system, it is important that all AC power connections to associated components (receivers, amplifiers, pre-amplifiers, processors, etc.) are either unplugged or turned off. Do not plug in or connect the SA-2 to AC power until all connections have been made.
tings on the same track. Do not attempt to evaluate the best sound while standing above the subwoofer or amplifier , as the sound at the listening position will be significantly different. Subwoofer V olume Control The SA-2’s front p anel VOLUME CONTROL allows you to adjust the volume of the subwoofer relative to the rest of the system.
This method of connection allows your main speakers to receive the full-range audio signal (no high-pass filtering), and the subwoofer to be utilized for low bass extension only . 1) Y our L & R speakers are connected directly from your amplifier / receiver .
This method allows your main speakers to receive a high-pass filtered signal (not full range), and the subwoofer to be utilized for low- to mid-bass reproduction.
This method of connection is recommended if you have a receiver with no line level preamplifier output of any sort and you want your L & R speakers to receive a high-pass filtered signal. The SA-2 may be connected to the system at speaker level between the receiver and the speakers.
This method of connection is recommended when you have a receiver with no line level preamplifier output of any sort and you want to run your speakers full range (no high-pass filtering). If your receiver features two set s of speaker output terminals (“S peaker A” and “S peaker B”), you may use “S peaker B” to connect the SA-2.
Fine T uning the Subwoofer The frequency chart below lists some terms commonly used to describe dif ferent bands of the frequency spectrum. The key to good subwoofer / speaker integration is repeated listening, followed by small re-adjustments of the subwoofer controls.
Multiple Subwoofer Configurations: Using two SW2Si subwoofers While the addition of a powered subwoofer system results in significant improvement s to an audio or home theater system, there are some potential drawbacks to the use of a single subwoofer in certain rooms.
This connection method routes the full-range line-level signal from the preamplifier through the SA-2, which passes on a high-pass filtered signal to the main amplifier and powers the subwoofer sections of the speakers directly with a low-pass filtered signal.
This connection method results in sending a full-range line-level signal to both the main amplifier and the SA-2. If you have a separate preamplifier that features two sets of line output s, each set is connected to one amplifier . If the preamplifier features only one set of line outputs, use “Y”-adaptors to split the signal.
This connection method may be employed if your receiver has no line-level preamplifier output. The speakers and the SA-2 are con- nected in parallel of f the receiver ’s speaker output terminals.
Recommended biamplification settings: 1) SUBWOOFER PHASE: 0° . If the main amplifier inverts phase, use 180°. If you are unsure about this, select the setting that result s in higher bass output with the volume control unchanged.
T roubleshooting If the amplifier fails to operate when the Power Switch is turned on, check the power cord and all the input and output connections thoroughly . If the front panel st atus LED is red, the unit is in “protect” mode. This could be caused by incorrect wiring, short circuits, or excessive volume.
W arranty (V alid Only in the U.S.A.) W arranty Period: For the period of 5 years for parts and 5 years for labor for loudspeaker product s and 1 year for part s and 1 year for labor for electronic co.
デバイスNHT SA-2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：
NHT SA-2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NHT SA-2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。NHT SA-2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。NHT SA-2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。
NHT SA-2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NHT SA-2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、NHT SA-2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NHT SA-2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。
