Thermionic Culture Ltd Culture Vulture Stereo Mastering Plus Valve Enhancer, 40Hz to 20kHz Frequency Response, 20kOhms Line Input Impedance

The Thermionic Culture Ltd Stereo Mastering Plus Valve Enhancer is designed to give the user not only an accurate "mastering" version of the Culture Vulture but more effect options. The unit is accurately aligned for stereo or single channel operation. All valves are "military" specification, NOS, made in France and USA and have low noise plus extended life. With mastering in mind, this version of the Culture Vulture retains all of the qualities of the earlier design and has closely matched controls and valves. A test report is supplied with each one, which gives the optimum current (usually 0.25 mA) which the Bias controls should be set to for minimum distortion.

The "Function" control now has 4 settings. They are T triode type 2nd harmonic distortion, P1 pentode type, 3rd harmonics, P2 new setting, as P1 up to a peak, then over-compresses with distortion effects, P3 the original P2 setting ("no holds barred")

The Drive control consists of an indented pot for fine control and a switch which increases the input gain in 2x 10 dB steps to "Overdrive". The Output Level control also has an indented pot for fine control and a -10 dB switchable attenuator. Sowter transformers are used to balance line input and output, but DI input and low level output are both unbalanced. The DI input is high impedance, high gain for instrument use. The bypass switch ignores the DI input and connects any signal coming to the line input jack to the line output jack, bypassing the electronics for comparison purposes.