Revisiting Pleiades K117 pre preamplifier with iPad

It sounds fantastic as expected with so a minimal signal path. Just an input transformer a K117 JFET and a 220Ω source resistor.


Signal path:


Kitchen with tiles - male voice singing Πως Θα Ηταν - Shure SM58 Mexico at 1 in - Pleiades proximity compensating 30mH : 19H input transformer inside Neutrik female to male adaptor - Pleiades K117 inside female XLR - iPad (headphone mic connection) with GarageBand - Sennheiser HD580


There were some sibilant problems and the reasonance of the transformer could be heard as it was unterminated and possibly not as quiet as the Pleiades EF183 electron tube V series pre preamplifier but it sings too.