Preamp: adjustable impedance + GAIN

Olympia LXi

Can drive any amplifier, with ease.

From its maker

Good Listening

Peter

I am not aware of any preamplifier with adjustable input and output impedance. Not saying no such device exists, just that I've never heard of one. Other than that, the new Esoteric preamps (C-03x and C-02) may satisfy your other requirements (the gain of each input can be adjusted +/- 18 dB), except that they use sealed sub-chambers for the internal power supply rather than a separate power supply box. But be prepared to pay large!

You just want the lowest output impedance you can get in the preamp.

What is actually just as important is not so much that the output impedance is low, but also that it is the same at 20Hz as it is at 1KHz or 20KHz.

If balanced, best results will be had if the preamp ignores ground at its output- that is to say that the output occurs between pins 2 and 3 of the XLR, and pin 1 (ground) is merely used for shield.