Lexicon 312, 501, 412, 212, 225 manual Model

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, the 412 is an excellent choice to bi-amplify your audio or video system, either actively using an electronic crossover, or passively, using independent connectors for the high and low frequency drivers.

Model 501

The 501 power amplifier consists of 2 amplifier modules, each with its own +60V power supply and 8 custom power transistors, for a total of 16, or 32 per stereo pair. The 2 modules can be configured in either Series or Parallel* mode to form a single mono power amplifier capable of up to 800 watts. The Series mode connects the modules in a bridged configuration. The output voltage swing is thus additive, and is appropriate for driving loads from 3-8Ω. Parallel mode yields the voltage swing of a single amplifier module, but the current available is additive, and is appropriate for driving loads from 1-3Ω.

*As the impedance ranges describe nominal, not minimum, impedance, it is almost never advisable

to use Parallel mode for direct connection to a speaker. Parallel mode is generally only useful when abnormally low impedances (1Ω or less) are created from parallel wiring of multiple speakers.

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