Just for further reference I post here two litte tests comparing two relatively low budget ribbon mics: Superlux R102 active ribbon mic (129 Euro at the monment) and sE X1R passive ribbon mic (119 Euro right now). Fethead inline matching amp is around 80 Euro.
Withought judging how the comparison is for you I should say, that if you like ribbon sound, both (Superlux R102 and sE X1R with Fethead) are very viable ways to obtain good ribbon sound with low noise and no issues of preamp impedance or clean gain, so you don't need to involve with them into specilized boutique microphone preamps. Especially it surprised me how quiet the Superlux is.
Here the comparisons. In each video both takes are recorded simultenously, no processing apart from mixdown to 48kHz/16bit for video.
(sE X1R just passive)
(sE X1R via Fethead)
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