Spatial Audio Raven Preamp

One of the points of inspiration: the late-Twenties Western Electric Model 43A amplifier, used in the WE Mirrophonic theatre systems.

Of course, things were a little bigger back then. This entire rack is one channel of amplification. Two racks were typically used, with instant changeover in case of failure while the movie was presented.

@lynn_olson Fascinating but do you ever sleep?🤔

What Lynn said about coupling caps is true.  I have gone through most of the best ones in various designs, and they can sound good to very good.  But the entire Revelation series we designed for Spatial has NO coupling caps from the input to the preamp to the output of the 300b amps.  When you eliminate all of them the sound is quite remarkable.  Provided you have REALLY good custom transformers, specifically designed for their application, and we do.  The Raven preamp will actually drive a 600 ohm load, so a 5K power amp is nothing to it.

I placed my order 2 weeks ago and chose the cherry base.  The build should be complete by the end of May according to Spatial.  I will post my impressions after about 20 hours of burn-in.