Nelson-Reed Pass First Watt F4 Nelson Pass First Watt F4 Power Amp

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Nelson Pass First Watt F4 Power Amp

Nelson-Reed Pass First Watt F4

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Last Update On 1.07.2025

Description Original Description is in English, other language texts are translations and can contain errors. English Deutsch Spanish Turkish Kit built power amp.

The First Watt F4 is a classic Nelson Pass/First Watt design with JFET inputs and MOS-FET outputs. However, as with the other FW amps there is a twist here, namely that the F4 has no voltage gain. That means it’s essentially a buffer than can provide a full 25W class A output.

This amp is low or no gain so needs a preamp with a decent output.

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