INTRODUCTION Congratulations on your purchase of the Theta stand alone pre-amplifier. You are now the owner of the most innovative guitar amplifier ever produced. The same innovation and killer sound that you can find in our Theta Head and Theta Combo is now available in one smaller package and is ready for low-end players and shredders of all kinds. Please read this manual carefully for a through explanation of the THETA Pre-Amplifier and its functions.
FRONT PANEL Understanding the THETA amplifier THETA PREAMP1 1. PREAMP1 ON LED This led indicates when PREAMP1 is active and in the signal path. NOTE: The PREAMP1 switch on the FOOTCONTROLLER switches PREAMP1 on and off. PREAMP1 is functional only when the CLEAN channel is selected. PREAMP1 and PREAMP2 will automatically switch with the channel selected. 2. PREAMP1 GAIN CONTROL This control adjusts the amount of gain in the signal path of PREAMP1. 3.
. MIDRANGE BOOST/CUT CONTROL This control works in conjunction with the SWEEP frequency control 5. The MID and SWEEP controls work together to provide a semi-parametric tone control. When the MID control is set at 12:00 straight up there is no boost or cut in the MID frequency portion of the spectrum. The graph below shows the response of the MID boost/cut and SWEEP controls. The MID control allows +/- 12db of boost or cut to be applied at the frequency determined by the SWEEP control. 5.
THETA CLEAN CHANNEL 1. CLEAN CHANNEL ON LED This led indicates when the CLEAN CHANNEL is active. NOTE: The CHANNEL SELECT switch on the FOOTCONTROLLER switches between the CLEAN CHANNEL and DISTORT CHANNEL. THE CLEAN can be selected by using either the FOOTCONTROLLER CHANNEL SELECT switch or by pushing the CHANNEL SELECT switch on the from panel of the Theta amplifier. 2. PRESENCE CONTROL This control adjusts the amount of high frequency presence in the CLEAN channel.
SWEEP FREQUENCY CONTROL This control works in conjunction with the MID boost/cut control and adjusts the center frequency of the MID boost or cut signal. At the full counter clockwise setting the midrange frequency will be at 300Hz, at the full clockwise setting the center frequency of the midrange will be at 6KHz. NOTE: when the MID control is set at 12:00 straight up the SWEEP will not have any affect on the signal since there is not boost or cut being applied. 6.
9. LEVEL CONTROL The LEVEL control adjusts the output LEVEL of the CLEAN channel. NOTE: The final output level is determined by the setting of the MASTER LEVEL CONTROL. THETA DISTORT CHANNEL 1. DISTORT CHANNEL ON LED This led indicates when the DISTORT CHANNEL is active. NOTE: The CHANNEL SELECT switch on the FOOTCONTROLLER switches between the DISTORT CHANNEL and CLEAN CHANNEL.
6. TREBLE CONTROL The TREBLE control adjusts the boost or cut that is applied in the high frequency portion of the spectrum of DISTORTION CHANNEL. The maximum TREBLE boost and cut range is +/-15 decibels. 7. REVERB LEVEL CONTROL The REVERB control adjusts the amount of digital reverb that is added when using the DISTORTION channel.
5. CHANNEL SELECT SWITCH The CHANNEL SELECT switch changes the THETA operating channel from CLEAN to DISTORT. The CHANNEL SELECT switch is a momentary switch that changes the channel upon pushing the switch. This switch can be used with or without the FOOT CONTROLLER connected. BACKPLATE CONTROLS 1. POWER INLET MODULE This module provides a connection for the power cord. 2.
THETA FOOT CONTROLLER 1. PREAMP1 SWITCH This switch turns on and off PREAMP1 the CLEAN channel preamp on the THETA. 2. PREAMP1 LED When this LED in on PREAMP1 is active, switched on. 3. PREAMP2 SWITCH This switch turns on and off PREAMP2 the DISTORTION channel preamp. 4. PREAMP2 LED When this LED in on PREAMP2 is active, switched on. 5. CHANNEL SELECT SWITCH This switch changes the channel selected between CLEAN and DISTORT. 6.
THETA PRE-AMP SPECIFICATIONS Power: 400 watt RMS Bass Control /Preamp 1 and 2: +/-15db at 80Hz Bass Control /Clean and Distort: +/-15db at 80Hz Mid Sweep Frequency /Preamps: 300Hz to 6KHz Mid Sweep Frequency /Channels: 300Hz to 6KHz Mid Boost/Cut Range /Preamps: +/-12db Mid Boost/Cut Range /Channels: +/-12db Presence Range (Clean Channel): -0db to +18db Decimator Effective Noise Reduction: Greater than 80db Response: 45Hz at (-10dB) Dimensions: 19” W x 3.5” H x 8” D Weight: 4 lbs.
WARRANTY AND SERVICE The Internal Circuitry is fully guaranteed to be free of defects under normal use and service for a period of two years from the date of purchase. The Speakers and Cabinet that are used in this product are fully guaranteed to be free of defects under normal use and service for a period of three years. Any damage resulting from the misuse or the failure to follow the precautions and instructions will void the warranty.
