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Table of contents for the manual
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Page 1
SA-2 Subwoofer Amplifier Now Hear This 535 Getty Court Benicia, CA 94510 800-NHT -9993 OWNER’S MANUAL [...]
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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. 4. FOLLOW INSTRUCTIONS - All operati[...]
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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. For your convenience, a glossary on page 16 explain[...]
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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. The NHT SA-2 Subwoofe[...]
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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 independently of the main speakers (D) Subwoofer Output T erminal - 5-way binding posts for connection to the subwoofer (E) High Level Output Barrier Str[...]
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Page 6
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. The SA-2 subwoofer amp[...]
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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. Many [...]
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Page 8
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 . 2) If you have a receiver with “Pre-Out” (or “Line Out”) jacks but no “Main-[...]
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Page 9
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. The full-range line-level signal coming from the receiver’s “Pre-Out” passes through the SA-2’ s selectable high-p ass filter , which removes the low frequencies from the signal b[...]
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Page 10
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. The SA-2’ s speaker-level output has a fixed 100Hz high-pass[...]
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Page 11
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. 1) Conn[...]
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Page 12
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. The most im portant bass tuning functions you will control are the LOW-P AS[...]
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Page 13
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. A single subwoofer tends to excite the resonant frequen- cies of a room, ine[...]
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Page 14
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. Do not use the receiver ’s “Subwoofer Out” jacks to connect the SA-2, as this signa[...]
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Page 15
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. If you have a rec[...]
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Page 16
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. If your receiver has two sets of speaker output terminals (“S p eaker A” and “S peaker B”), you may connect the speakers directly from “Speake[...]
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Page 17
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. 2) SUBWOOFER VOLUME: Adjust for accuracy , listening for seamless blending between upper and lower frequency range[...]
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Page 18
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. T urn off the Power Switch on t[...]
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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 components from date of original purchase (the warranty period) from an authorized NHT dealer , NHT warrants that if our product fails to function prop-[...]