Thermionic Culture THE NIGHTINGALE 2 Dual mic. Amp/equaliser+ compressor - Manual (Page 4)

©Thermionic Culture Ltd August 2014 3
1 Introduction
The Nightingale 2 is an improved version of the original
Nightingale.
It now incorporates a useful eq bypass switch for
comparison purposes in Input channels A & B. There is also
a Standby switch which when activated reduces the high
tension voltage to all of the valves. Use of this will prolong
valve life and should be used when first switching on and at
any time that the unit is standing idle with mains supply on.
The Nightingale 2 comes in exactly the same 4U ½ rack
format with detachable power supply and can be used either
stand-alone due to its robust construction, or mounted in a
standard 19 inch rack using our rack mount kit. It can be on
its own or share the space with another unit in this range.
The Nightingale uniquely comprises 3 different components.
There are 2 (A and B) mic. / line preamps which also have
EQ, filters, phase adjustment, 48V phantom power and a
front panel DI input.
There is one mono compressor that is a modified version of
the Phoenix, one of Thermionic Culture’s oldest and most
popular designs.
We have provided front panel switching to allow the user to
configure the Nightingale 2 in different modes. The
components can all be used separately or they can be linked
and summed together internally via the front panel control.
Each preamp has a transformer balanced input, transformer-
less unbalanced output and uses 1 valve per channel. The
valve is an ECC832. The valves are run in a single ended
configuration, which we feel gives a good balance between
smoothness, clarity and harmonic distortion.
The EQ circuit is an active design, which is similar in
operation to that found in the Earlybird 2 mic. preamps.