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Classic
Ten Twelve
Powered Subwoofers
Owners Manual
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IMPORTANT SAFETY INSTRUCTIONS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER TO QUALIFIED SERVICE PERSONNEL. The lightning flash with the arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
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Thank you for your purchase of the NHT Ten or Twelve The key to placing your subwoofer for optimal enjoyment powered subwoofer. is to remember that low frequencies produce sounds with long wavelengths, which interact in complex ways with Like all NHT loudspeakers, the Ten and Twelve develop- room boundaries, such a walls and corners, and other ment has been guided by the study of human hearing, it’s large objects as well. design rigorously tested, and its components optimized to deliver clean,
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forcement may lead to low frequency response that is Two tips on using the Low Pass Filter: uneven. Some frequencies will sound exaggerated rela- As a starting point, set Low Pass Filter to the 1 o’clock tive to others, or the subwoofer will sound thin and lack position. This will result in an 80Hz low pass. As the set- impact. The Boundary EQ control allows you to com- ting is typical for most Dolby Digital / DTS applications. pensate for the effects of room boundaries on the fre- Note: The L
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9 8 7 4 Connecting The Ten OR Twelve 3 Line Line LFE Input Input Caution: Before connecting the Ten OR Twelve to your Low Low Pass Pass Filter Filter Volume In L audio system, it is important to unplug or turn off all AC Out R 40Hz 180Hz Min Max Power Power power connections to connected components such as Hi Hi Level Level Input Input Mode Mode Phase Boundary 5 On 180 +3dB 0 Auto 0 -3dB receivers, amplifiers, preamplifiers, and processors. Do +L + L---R - R ++ 6 not plug in or connect the Te
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Fig. 3 • For amps and receivers with separate A and B speaker outputs, connect one pair of speaker cables from your receiver's Speaker A outputs to your main L & R speakers, and a second pair from your receiver's Speaker B outputs to the Ten OR Twelve's High-Level Input. Use this method only if both A & B speaker outputs can operate simultaneously. • For amps and receivers with only one set of speaker output terminals, simply feed the same signal, in parallel, to both your main L & R speakers
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The frequency chart below lists some terms commonly Fine Tuning the Subwoofer used to describe different bands of the frequency spectrum. Listen to your system and make adjustments The key to good subwoofer / speaker integration is to achieve a seamless blend between your main repeated listening, followed by making small re-adjust- speakers and the Ten or Twelve. Four common problems ments of the subwoofer controls. The most important are outlined below. Follow the flow chart to correct these.
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• reinstall the fuse holder Operation Always replace the fuse with one of the exact same We recommend that the Ten or Twelve power be left on, specifications. which will allow the built-in Auto Mode feature to disable the subwoofer when not in use. Ten: Every speaker, has limits, and it's important to listen for them. Speaker damage most often results not from brief For systems operating at 115 volts, use only a 5x20 mm, loud musical peaks, but from sustained high volume T3A, 250-volt slow-blo
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To legally install cable TV or a DSS system, there must Glossary be a ground conductor from the dish or cable tied to the earth outside of the building. This guarantees that if Active: Uses electrical power. struck by lightening, the current will flow to ground (earth) Amplifier: An electronic device that increases the cur- outside of the building, never endangering someone’s life inside or damaging any equipment. Removing the rent and/or voltage of a signal, providing power to the ground from t
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the back of a receiver, integrated amplifier or power amplifier. Midrange: The frequency span in the middle of the audio range, roughly 180Hz - 3000Hz. Also used to describe the driver that reproduces these frequencies. Ohm: A unit of electrical resistance. That which opposes an electric current in a conductor. In audio, a measure of the load presented by a device to an electrical source. Out-of-Phase: The polarity of an audio signal when con- nected as follows: (+) to (-) and (-) to (+). Pass
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Specifications All Classic Series products are sonically matched for seamless integration into multichannel systems. Classic Absolute Zero Two Three Four Two C Ten Three C Twelve Bass Reflex / Bass Reflex/ System Type 2-Way Acoustic 2-Way Acoustic 3-Way Acoustic 4-Way Bass 3-Way Acoustic 3-Way Acoustic Powered - 150 watts Powered - 250 watts Suspension Suspension Suspension Reflex Suspension Suspension Class G Amplifier Class G Amplifier Driver Complement Tweeter- 0.75” fluid cooled aluminum dom
