The VTP-100 is a half rack  vacuum tube and discrete high voltage preamplifier, offering Ultra low noise,  discrete and propietary opamp amplifiers , Class-A all triode vacuum tube operation with parallel tube topology  and  transformerless output stage.

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The MP-800 is a 2 rack  vacuum tube and discrete high voltage preamplifier, offering Ultra low noise,  discrete and propietary opamp amplifiers , Class-A all triode vacuum tube operation with parallel tube topology  and  transformerless output stage.

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The MAX-800 is a 3 rack  vacuum tube and discrete high voltage preamplifier, offering Ultra low noise,  discrete and propietary opamp amplifiers , Class-A all triode vacuum tube operation with parallel tube topology  and  transformerless output stage,with Optical and Fet Compressor / Limiters per channel.

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