NHT SA-2 Owner's Manual
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NHT SA-2 Owner's Manual

NHT SA-2 Owner's Manual

Nht subwoofer amplifier owner's manual sa-2
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SA-2
Subwoofer Amplifier
OWNER'S MANUAL
Now Hear This
535 Getty Court
Benicia, CA 94510
800-NHT-9993

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Summary of Contents for NHT SA-2

  • Page 1  SA-2 Subwoofer Amplifier OWNER’S MANUAL Now Hear This 535 Getty Court Benicia, CA 94510 800-NHT-9993...

  • Page 2: Important Safety Instructions

    18. SERVICING - Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel. For service warranty information call the NHT Hotline number: 1-800-NHT-9993.

  • Page 3: Table Of Contents

    NHT dealer or our Toll-Free Customer Service Hotline at: Please retain the SA-2 packaging to protect the amplifier in the event that you move or transport it. 1-800-NHT 9993...

  • Page 4: Specifications

    NHT products are designed to deliver refined, musical sound from attractive and affordable packages. Our efforts 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.

  • Page 5: Front And Back Panel Diagrams

    (E) High Level Output Barrier Strips - Speaker level connection to satellite speakers (F) High Level Input Barrier Strips - Speaker level connection from amplifier or A/V receiver (G) Line In - Low level RCA input jacks (H) Low-Pass Filter (Subwoofer Fc) -...

  • Page 6: General Connections

    SA-2 and the subwoofer, with heavier special purpose cable used for longer runs. For specialty cable considerations, consult your local authorized NHT retailer. If you are using a single SA-2 to drive two SW2Si subwoofers in parallel, it is preferable to use similar lengths of speaker cable for connections to each subwoofer.

  • Page 7: Subwoofer Volume Control

    Subwoofer Volume Control The SA-2’s front panel VOLUME CONTROL allows you to adjust the volume of the subwoofer relative to the rest of the system. Many listeners make the mistake of setting subwoofers too loud, which can cause excess bloat and loss of detail and musicality. A properly cal- ibrated subwoofer blends in with the speakers and does not call attention to itself.
  • Page 8 3) Many integrated amplifiers and receivers feature a “Subwoofer Out” jack. If your receiver’s “Subwoofer Out” consists of a single RCA jack, you may plug it into either the left or right LINE IN jack on the SA-2. Alternately, you may utilize a “Y”-splitter to split the line-level signal into both jacks.
  • Page 9 OUT back to the receiver’s “Main-In.” 2b) If you have a separate preamplifier and main amplifier, connect the preamplifier output to the SA-2’s LINE IN. Connect a second interconnect cable from the SA-2’s SATELLITE LINE OUT to the main amplifier’s line-level inputs. With this configuration, your preamplifier is not connected directly to your amplifier;...
  • 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.
  • Page 11 3) If your receiver is not equipped with “Speaker A” and “Speaker B” output terminals, you may connect both the L & R speakers and the SA-2 in parallel from the same terminal. Connect one pair speaker cables from the receiver’s speaker output terminal to the L &...

  • Page 12: Fine Tuning The Subwoofer

    The frequency chart below lists some terms commonly used to describe different 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 important bass tuning functions you will control are the LOW-PASS FILTER, followed by the VOLUME CONTROL settings and then PHASE SELECTOR.

  • Page 13: Multiple Subwoofer Configurations: Using Two Sw2Si Subwoofers

    Towers may be biamplified monaurally using a single SA-2 and a full-range main (stereo) amplifier, or biamplified in stereo using two SA-2’s and a main amplifier. Additionally, the towers may be biamplified either in series or in parallel. Wired in series (Method #1), the main amplifier receives a filtered line-level signal via the high-pass output from the SA-2.

  • Page 14: Biamplification Method

    Do not use the receiver’s “Subwoofer Out” jacks to connect the SA-2, as this signal is likely to be different from the full-range L & R channel signal.
  • Page 15 If you have a receiver with “Pre-Out” jacks but no “Main-In” jacks, you can use the “Pre-Out” jacks to connect the SA-2, without having to route the signal back to the receiver. Do not use the receiver’s “Subwoofer Out” jacks to connect the SA-2, as this signal is likely to be different from the full-range L &...
  • Page 16 3) Run a second pair of speaker cables from the receiver’s speaker output terminals to the SA-2’s INPUT FROM AMPLIFIER barrier strip terminal. If the receiver has two sets of speaker output terminals, connect the tower speakers from “Speaker A” and the SA-2 from “Speaker B.”...

  • Page 17: Recommended Biamplification Settings

    Operation The SA-2 was designed to handle a wide range of listening levels, but every component has limits. It is important to use common sense and listen for signs of possible distress from the subwoofer. Noticeable distortion or harsh breakup is an indication that either the SA-2 or the subwoofer is running beyond its capacity, and the volume should be decreased.

  • Page 18: Troubleshooting

    If the front panel status LED is red, the unit is in “protect” mode. This could be caused by incorrect wiring, short circuits, or excessive volume. Turn off the Power Switch on the front panel for two or more seconds to reset. Double check all speaker cables to be sure that no small strands are extruding.

  • Page 19: Warranty Information

    Altered, defaced or removed serial numbers void this warranty. Your Rights: The liability of NHT will be limited to the purchase price of the product, and NHT will not be liable for incidental or consequential damages. NHT limits its obligations under any implied war- ranties under state laws to a period not exceeding the warranty period.

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