AMPTEK AT-31/2 - Dual Germanium RCA BA-31C Style Preamp with UTC, Freed, Hammond Transformers

AMPTEK AT-31/2 Germanium Preamp - RCA BA-31C w/ NOS Transistors, Vintage UTC Transformers

*2 left in stock*

Bring the sounds of rock n' roll to your studio with the AMPTEK AT-31/2 Dual Channel Germanium Preamplifier. Rooted in solid state recording technology's coming of age during the late 50s, the AT-31/2 boasts a completely vintage signal path consisting of NOS transistors including RCA Germanium, Sprague and Raytheon silicon, 1960s UTC input transformers and rotating pairs of vintage output transformers. Extreme attention to detail was taken to provide users with an authentically New-Old-School experience - a straightforward, high quality vintage analog preamp that organically brings sources to life.

Originally designed by RCA as a fixed gain preamp, gain control is implemented through altering the amount of negative feedback present in the circuit, creating a much more flexible and powerful studio piece. Increasing the gain through negative feedback reduction allows users you to drive the transistors and output transformer harder for additional coloration while forming rich harmonic content, while output control is implemented post output transformer allowing users to drive signals hotter without overloading the next unit in a signal chain.

Controls:

Z-IN - Toggles preamp expected source impedance between 150 and 600 ohms. 150 generally pairs better with most microphones.

PAD - Standard 20dB pad to prevent hot signals from clipping the input stage (unless you want that!)

POL -  Flips input polarity

GAIN - 6-position stepped rotary control, alters gain by varying negative feedback present in the circuit, allowing you to push the transistors and output transformer, adding additional drive and harmonics to your signal.

OUTPUT - Continuous level control post output transformer, allowing you to drive the output transformer into saturation then pull back afterwards so as not to overload the destination.