Friday, March 10, 2017

MD21 or 635A to a 500Ω:50KΩ transformer to Pleiades V4

Fantastic combination.


The input trasformer is one of the gold colored 1/4in to 1/4in jack 500Ω to 50KΩ. It's primary inductance is about 330 milliHenries so it cuts the bass needed to restore flat frequency responce from vocal chords of the singer to the brain of listener.


Amazing natural sound.


The Pleiades V4 EF183 electron tube preamplifier was powered by just 3.6V. So all secondary emission effects seem to not happen at such low voltage. The low noise smooth quietness and great signal to noise ratio is a joy to hear. It is creamy smooth like softest silk.


Setup:


Omnidirectional mic - cheap input transformer 500Ω:50KΩ - Pleoades V4 - Realistic disco mixer 32-1101A - Sennheiser HD580


This particular model of Realistic mixer has a lower headphone output which is very kind to protect ears.


The Philips N8207 sound fantastic too (the brown vintage (aluminum voice coil?) seems even better).


It seems what microphones do not do that is important. A small bandwidth is needed for flat frequency responce to our brain. More of this on a older euroelectron post.

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