A great sounding moving coil small diaphragm microphone.
They have been also described in other euroelectron posts.
They come at low or high impedance and their eBay price is now so low for the sound quality they give.
So far the following variations have been tried.
Small red 1/8in output jack. It is bass uncompensated. Compensating bass reduction can be done by a suitable choice of loading inductance, see Pleiades filters for flat frequency responce from vocal chords to brain. It is low impedance, 600Ω? It can be directly connected to a transistor recorder. For example cassette recorders or very portable ones such as Sanyo TRC-2500. It can also be connected to a balanced low impedance line directly. It can also be connected to an input step up transformer to step up the voltage and impedance. The primary inductance of the transformer can perform the required bass cut compensation, The stepped up impedance and voltage can then drive the gate of a JFET or the grid of an electron tube. The result is a big signal that may send to lunch or for tea many condenser mics. Example JFET or electron tube prepreamps are the Pleiades K117 JFET or Pleiades V4, V5, V6 EF183 battery powered electron tube prepreamps.
Small grey 1/8in output jack. The ones tested were hi Z, 10KΩ? They are bass compensated so they sound fantastic directly connected. They can be connected directly to a Tascam Porta since they usually have an input impedance of 50KΩ and they seem to be happy with a driving impedance of 10KΩ. They can also drive the Pleiades electron tube or JFET preamps without they need of an input transformer as they have it inside them.
Big black 1/4in output jack. High impedance too. Bass compensated. It has also been tried with Tascam Porta 07 for great amazing sound. It has also been tried connected to iPad through a Pleiades K177 preamplifying (K117 JFET inside a female connector) cable for great sound.
Big black 1/4in output jack. High impedance. This one is bass uncompensated. So it sounds big and bass heavy. Should be suitable for drums. And also driving the iPad through a Pleiades K117 as the iPad has already a low cut filter at the headphone mic input.
Reference:
Flat frequency responce from singer's, actor's vocal chords to listener's brain, Sound Picture a Recording and Reproducing Characterustics - Lowe, Morgan - Journal of the Society of Motion Picture Engineers
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