The Thermionic Culture Nightingale is the second of the Thermionic Culture half rack 4U units. These are of course all valve. Continuing with the 3-part principle (3 being the most powerful number in the universe) it consists of 3 parts: 2 x Mic amps with useful valve eq. Both have their own outputs (XLR unbalanced), which can give 20+dBu. These can be combined or taken individually into...1 x vari-mu compressor-based on The Phoenix but with a little more "attitude". The compressor section has its own input ("balanced" XLR) which can be selected instead of a feed from the mic amps, also an XLR "balanced" output capable of +25 dBu.