Thermionic-culture THE FREEBIRD 3 channel equalizer User Manual

CULTURETHERMIONICTHE FREEBIRDOPERATING MANUALvalve equaliser

©Thermionic Culture Ltd., May 2011 9 5.2 Operating voltages / fuses The Freebird can be set to operate from either 230V or 115V 50/60 Hz AC. The ap

©Thermionic Culture Ltd., May 2011 10 6 Specification Frequency response ±0.5dB ±1dB (all controls flat) 20Hz-80kHz 15Hz-130kHz Input impedance 10k

The Freebird - Frequency Response CurvesFrequency (kHz)Bass+5@50HzBass+5@100HzBass-5@50HzBass-5@100HzHPF 25HzHPF 65HzMid CutTop+5@50HzTop+5@100Hz-30-2

The Freebird - Presence CurvesLMHH+H++-30-25-20-15-10-5051015200111.010.0Frequency (kHz)Gain (dB)

Thermionic Culture Ltd., Harlow, Essex, UK Tel: +44 (0)1279 414770 Fax: +44 (0)1279 412233 www.thermionicculture.com ©Thermionic Culture Ltd., May 2

©Thermionic Culture Ltd., May 2011 1 WARNING For your personal safety, please read this operating manual and warning thoroughly before using the

©Thermionic Culture Ltd., May 2011 2 CONTENTS Section Page 1 Introduction 3 2 EQ Style 4 3 Circuit Design 5 4 Controls and Operation 6

©Thermionic Culture Ltd., May 2011 3 1 Introduction The Freebird is one of a new line of products from Thermionic Culture Ltd. These products all s

©Thermionic Culture Ltd., May 2011 4 2 EQ Style The Freebird EQ is based around a Baxendall type circuit. This gives the user two shelving controls

©Thermionic Culture Ltd., May 2011 5 3 Circuit Design The design of The Freebird was also initially based around the type of valve selected. We fel

©Thermionic Culture Ltd., May 2011 6 4 Controls and Operation 4.1 Gain The rotary gain control is located at the top of each channel. It allows t

©Thermionic Culture Ltd., May 2011 7 The 'M' setting is the original design, which simply gives a very broad lift to mid and top. The lowe

©Thermionic Culture Ltd., May 2011 8 5 Servicing and maintenance The Freebird comes with a 12 month warranty covering all parts, including valves.