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Lexicon
NT Series
Amplifiers
User Guide
Models 212, 312, 412,
225 and 501
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Unpacking and Inspection After unpacking the amplifier, save all packing materials in case you ever need to ship the unit. Thoroughly inspect the amplifier and packing materials for signs of damage. Report any shipment damage to the carrier at once; report equipment malfunction to your dealer. Precautions Save these instructions for later use. Follow all instructions and warnings marked on the unit. Always use with the correct line voltage. Refer to the manufacturer's operating instructions for
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Dansk Suomi Vigtig information om sikkerhed Tärkeitä turvallisuusohjeita Säilytä nämä ohjeet tulevaa käyttöä varten. Gem denne vejledning til senere brug. Seuraa kaikkia yksikköön merkittyjä ohjeita ja varoituksia. Følg alle anvisninger og advarsler på apparatet. Käytä aina oikeaa verkkojännitettä. Tehovaatimukset selviävät valmistajan Apparatet skal altid tilsluttes den korrekte spænding. Der henvises til käyttöohjeista. Huomaa, että eri käyttöjännitteet saattavat vaatia brugsanvisningen, der i
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Deutsch Español Wichtige Sicherheitsanweisungen Instrucciones importantes de seguridad Heben Sie sich diese Sicherheitsanweisungen auch für später auf. Guarde esta instrucciones para uso posterior. Befolgen Sie alle auf der Vorrichtung stehenden Anweisungen und Warnungen. Utilice siempre el voltaje correcto. Diríjase a las instrucciones de operación Immer nur mit der richtigen Spannung verwenden! Die Gebrauchsanweisungen del fabricante para obtener las especificaciones de potencia. Esté al tanto
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Contents Introduction Overview .................................................................................... 1 Models 212 and 225.................................................................................. 2 Model 312 .................................................................................................. 2 Model 412 .................................................................................................. 3 Model 501 ...............................................
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Lexicon NT Series Amplifiers Congratulations on your purchase of a Lexicon amplifier. Your amplifier has Introduction been designed and manufactured for absolute linearity and stability. Utilizing a unique Quad-Complementary output stage, the NT Series amplifers produce less distortion than even Class A designs, with higher efficiency and better long term reliability. A wide variety of input and output connections and configu- rations are accommodated, as well as unique features specific to comp
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Lexicon NT Series Amplifiers Overview Models 212 and 225 The 212 stereo amplifier consists of 2 amplifier modules, each with its own power supply. The channels may be operated independently (1=left; 2=right) for stereo at 120 watts/channel @ 8Ω, 200 watts @ 4Ω, or bridged (monaural) to form a single 400 watt amplifier into 8Ω. The 225 stereo amplifier provides 250 watts/channel @ 8Ω, 400 watts @ 4Ω, or it can be bridged (monaural) to form a single 800 watt amplifier into 8Ω. Model 312 The 312
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Lexicon NT Series Amplifiers Model 412 The 412 power amplifier consists of 4 independent amplifier modules, each with its own +55V power supply, and 4 custom power transistors for a total of 16 output devices. The 412 can be configured to drive 2, 3 or 4 speakers: 4 channels at 120 watts into 8Ω, or 2 channels at 120 watts plus 1 channel at 400 watts, or 2 channels at 400 watts. This provides complete flexibility in any present or future audio or video system. With 4 discrete channels available,
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Lexicon NT Series Amplifiers Selecting the appropriate installation location for your amplifier is perhaps the Installation single most important factor in ensuring a long trouble-free service life. Al- though the amplifier is very conservatively designed, you must provide some airflow around the unit. If you intend to stack multiple amplifiers in an enclosed space, you should consider installing a fan or otherwise assuring adequate airflow around the amps, as they rely on convection cooling. As
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Lexicon NT Series Amplifiers Lexicon amplifiers do not require any specialized line conditioners, as they have Power special power supply circuitry designed to reject power line problems like line Requirements spikes, surges and RFI. Simply plug each amplifier directly into a line socket. In areas where there is a high likelihood of lightning strikes or other potentially catastrophic surges, additional protection may be warranted. Verify that any surge protection device you choose has ample powe
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Lexicon NT Series Amplifiers Operation Front Panel LEDs All amplifiers in the Lexicon NT Series are equipped with sophisticated com- parator circuits which detect sources of signal distortion including clipping, excessive DC or supersonic signals, and short circuits in the cabling. Multi- function LEDs on the front panel are provided to alert you to various opera- tional states of the amplifier. In normal operation, the front panel LEDs will be lit green, indicating that power is on and the unit
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Lexicon NT Series Amplifiers Wire multiple amplifier triggers in parallel. Common “zip cord” wire is adequate. (If you find that using audiophile cable for the trigger signal sounds better, feel free to use it, just don’t tell anyone else.) PLUS The pin outs on the CP-3 and DC-1 series have appropriate signals available via the rear panel DIN connectors. Pin 1 is ground and Pin 3 is +5V. (On the DC- 1, Pin 3 may be +12V, depending on an internal jumper configuration, but either 5V or 12V will w
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Lexicon NT Series Amplifiers Specifications Models 212,312,412 120 Watts per channel @ 8Ω, 200 watts @ 4Ω Bridging channels yields 400 Watts @ 8Ω Model 225 250 Watts per channel @ 8Ω, 400 Watts @ 4Ω Bridging channels yields 800 Watts @ 8Ω Model 501 500 Watts @ 8Ω, 800 Watts @ 4Ω S/N >110dB IM + THD <0.01% Input Sensitivity 1V for 28.28 VRMS (Approximately 100 watts into 8Ω) Input Impedance 50 kΩ Slew Rate 60 V/µs Damping Factor Individual mode: >500 (20 Hz into 8Ω) Bridged mode>250 (20 Hz into
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Lexicon Inc. 3 Oak Park Bedford, MA 01730 Tel 781-280-0300 Fax 781-280-0490 www.lexicon.com Lexicon Part # 070-11325 Printed in Canada
