NHT SW3S User's Manual
Contents
1. SW3S Subwoofer Owner s Manual Thank you for your purchase of the NHT Model SW3S Subwoofer Please take a few minutes to read through this Owner s Manual prior to installing your new subwoofer The information provided can help you to obtain maximum performance from your audio system If you have questions or need assistance at any time during the installation or operation of your new subwoofer please call your NHT Dealer or our Toll Free Customer Hotline at 1 800 NHT 9993 Please retain the Model SW3S packaging to protect the subwoofer in the event that you move or transport it Model SW3S Specifications System Type Acoustic Suspension design Impedance 6 ohms nominal 4 ohms minimum Driver Complement 12 polypropylene woofer Inputs 1 pair of 5 way binding posts Response 23Hz to 250Hz Weight 72 Ibs each Sensitivity 87dB 2 83V at 1M Dimensions 19 H x 19 W x 19 D Recommended Power 50 watts min 250 watts max Finish High gloss black laminate Specifications are subject to change without notice in accordance with our policy of continuously upgrading the performance of our products E Design NHT speakers 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 loudspeaker undergoes rigorous testing and quality control at the factory to ensure you years of listening pleasure2. The SW3S Subwoofer features a custom designed 12 polypropylene woofer that is capable of accurate low frequency reproduc tion to 23Hz with high output and low distortion The SW3S when combined with the NHT SA 3 monaural subwoofer amplifier comprises the NHT SW3P Powered Subwoofer System For a flatter overall low frequency response and increased clarity two SW3S subwoofers may be connected in parallel to the NHT SA 3 subwoofer amplifier which is designed with enough high current capability to drive two subwoofers Alternately you can use an external crossover and a monaural amplifier of your choice to create your own powered subwoofer system E Placement Contrary to popular belief subwoofers are sensitive to placement Experimentation is the key to finding the best arrangement in your listening environment Generally a subwoofer should be located in the same horizontal plane and along the same wall as the main speakers Low frequencies produce long wavelengths and thus interact with room boundaries significantly Placing the subwoofer nearer to a room boundary walls corners will tend to increase its bass output but may result in boomy or muddy sound Conversely placing the subwoofer farther away from room boundaries will tend to decrease its bass output but may result in improved articulation and clarity Position the subwoofer so that it does not radiate sound directly into a wall or floor and ensure that it faces into the r
3. anty period Some states do not allow limitations on how long an implied warranty lasts and some states do not allow the exclusion or limitation of incidental or consequential damages The above limitations or exclusions may not apply to you This warranty gives you specific legal rights and you may have other rights which vary from state to state To Obtain Service NHT has appointed a number of authorized service companies throughout the USA should your product ever require service To receive warranty service you will need to present your sales receipt showing place and date of original owner s transaction To find the name and address of the nearest authorized NHT service location call or write Customer Service Department Now Hear This 6400 Goodyear Road Benicia CA 94510 1 800 NHT 9993 Please do not return your subwoofer to this address It is not a service location
4. ck of the SW3S will accept raw wire banana plugs or spade plugs Tighten the binding posts by hand as pliers can strip or break them Be sure to wire the subwoofer in phase That is the positive red terminal on the amplifier output must be connected to the corre SUBWOOFER OUTPUT sponding positive red terminal on the subwoofer Likewise with the Amplifier negative black terminals B All speaker wires have some sort of marking along one or both conductors to help you make the correct connections To minimize noise pickup segregate cables by function Do not run low level signal cables parallel to power cables speaker cables or digital cables Also do not run speaker cables or digital cables parallel to power cords or parallel to each other If different types of cables are placed near each other at some place in your system separate them by the maximum practical distance and cross them at right angles where they meet When using two SW3S subwoofers with a single SA 3 subwoofer amplifier the two subwoofers are wired in parallel Using two equal lengths of speak er wire connect the positive red conductors of both wires to the positive red terminal on the amplifier and both negative black conductors to the negative black terminal on the amplifier Then connect one speaker wire to the first subwoofer positive conductor to positive terminal negative conductor to the negative terminal and other speaker wire to the se
5. cond Subwoofer Subwoofer subwoofer wired in the same fashion Fig 1 E Operation The SW3S subwoofer was designed to handle a wide range of listening levels but every speaker has limits It is important to use common sense and listen for signs of possible distress from the speaker Noticeable distortion or harsh breakup is an indication that either your amplifier or your speakers are running beyond their capacity and the volume should be decreased If you can feel any heat emanating from the front of the woofer reduce the level immediately Speaker damage most often occurs from sustained high volume levels not from transient sounds or brief musical peaks Excessive boosting of bass or equalizer controls can worsen the problem and is not recommended E Maintenance Your subwoofer requires minimal maintenance under normal use The cabinet may be cleaned using a damp cloth or a mild non abrasive glass cleaner To clean the grille first remove it from the subwoofer then brush lightly with a soft brush or use a vacuum on its lowest setting Do not expose the subwoofer to direct sunlight high temperatures or moisture Do not attempt to clean the actual driver Limited Warranty Valid Only in the U S A Warranty Period For the period of 5 years for parts and 5 years for labor from date of original purchase the warranty period from an authorized NHT dealer Now Hear This NHT warrants that if our product fails to function properly under
6. normal use due to a manufacturing defect when installed and operated according to the owner s manual instructions enclosed with the unit it will be repaired or replaced with a unit of comparable value at the option of NHT without charge to you for parts or actual repair work Parts sup plied under this warranty may be new or rebuilt at the option of NHT What s Not Covered This warranty does not cover any product which is used in any trade or business or in an industrial or commercial application This warranty does not cover the cabinet or any appearance item or any damage caused to the product resulting from alterations modifications not authorized in writing by NHT accident misuse or abuse damage due to lightning or power surges or being subjected to power in excess of the speaker s published power rating This warranty does not cover the cost of parts which would otherwise be provided without charge under this warranty obtained from any source other than an authorized NHT service location This warranty does not cover defects or damage caused by the use of unauthorized parts or labor or from improper maintenance 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 warranties under state laws to a period not exceeding the warr
7. oom unobstructed by large furnishings If you are using two subwoofers the greatest improvement in low frequency response is achieved by placing the second subwoofer on the opposite side of the room from the first Avoid placing the two subwoofers symmetrically in the room such as in two corners As the SW3S is not magnetically shielded do not place it in the immediate vicinity of a television or picture discoloration may occur E Connections The SW3S Subwoofer is designed for use with an external crossover and a monaural amplifier The SW3S does not have an inter nal crossover so it should not be connected to any other amplifier or integrated amplifier unless it has a low pass filter Using the SW3S without a low pass filter will not damage it however the resulting sound will be undesirable Before connecting the SW3S to the SA 3 or any amplifier it is very important that you turn off the power to the amplifi er Proper wiring of the subwoofer is essential to good sound NHT recommends a minimum of 14 AWG wire to connect the SW3S Subwoofer to the SA 3 Amplifier If you choose to place the subwoofer at a distance greater than 15 feet away from the amplifi er we suggest you use 12 AWG or larger wire For specialty wire considerations consult your local Authorized NHT Dealer Prepare your speaker wire by stripping 1 4 to 3 8 of insulation from the ends and twisting the exposed wire strands tightly The five way binding posts on the ba
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