A ribbon microphone might sound very very dark if connected to an a,olifoermwithnfkat frequency response. Possible causes for this obvious non flatness or bass heaviness from producer's brain to listener's brain are:
Fletcher Munson curves
Voice effort curves
Proximity Effect
But some electron tube for example amplifiers can be so bright due to the surrounding components of the electron tubes (and electron tubes have a great quality of treble) that a ribbon microphone can be directly connected and sound bright and full of detail without the possible condenser microphone HF nastiness.
Such is the case with the Daven 3 1U4 electron tube preamplifier described on yesterday's euroelectron post.
While testing it, it's output impeadnce and small power could not drive a lot tyenSennheiser HD589 headphones. But the JVC radio amplifier was around connected to the linoleum Auratone 5C type speaker. So this proved a nice chance to connect preamplifier 2400Ω output to transistor radio line in.
It worked and sound very bright with excellent smooth HF detail.
Level had been kept low in order to avoid very high frequency tone acoustic feedback.
It sounded like The Power of Love - Frankie Goes to Hollywood
Signal path, setup
Singer's brain - Male singing voice at 6in - Fostex M80RP microphone - Daven 3 1U4 electron tube preamplifier powered by 1.2V and 70V - JVC 7425W radio used as power amplifier - Pleiades linoleum Auratone 5C type loudspeaker - bedroom - singer's ears and brain
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