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- Page 1 C O M P R E S S O R P A R A M E T R I C E Q U A L I Z E R USER’ S MANUAL v ersion 1.0 2003, PreSonus Audio Electronics, Incorporated. All rights reserved.
- Page 2 PreSonus reserves the right to update any unit returned for repair. PreSonus reserves the right to change or improve the design of the product at any time without prior notice. This warranty does not cover claims for damage due...
- Page 3 2003, PreSonus Audio Electronics, Incorporated. All rights reserved.
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Page 4: Table Of Contents
TABLE OF CONTENTS 1 Overview 1.1 Introduction 1.2 Features 2 Controls & Connections 2.1 Front Panel Basic Layout 2.2 Preamplifier 2.3 Compressor 2.4 Equalizer 2.5 Master 2.6 Back Panel 2.7 Power Supply 3 Operation 3.1 Microphones 3.2 Send and Return 3.3 192k/24-Bit Digital Output Card 3.4 Application Settings 4 Technical... -
Page 5: Overview
EUREKA before trying to hook it up to your system. Thank you, once again, for buying our product and may we wish you Good Luck and enjoy your EUREKA! 1 . - Page 6 This feature gives you wide dynamic range and excellent transient response characteristics. Saturation Control. The EUREKA offers a very high quality transformer and features an SATURATION control (this control adjusts the drain current on the input FET amplifier altering the even harmonic levels of the signal being passed) with an adjustment range of 0% to 100%.
- Page 7 Gain Reduction to Meter. Shows gain reduction on the meter implemented by the compressor. Level. The output of the EUREKA is adjusted by the Level control and is useful for compensating for gain loss due to compression or to decrease output signal that boosting frequencies with the Equalizer section may have caused.
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Page 8: Controls & Connections
2 . 1 F R O N T P A N E L B A S I C L A Y O U T The front panel of the EUREKA is divided into four sections – Preamplifier, Compressor, Equalizer and Master. - Page 9 CONTROLS & CONNECTIO NS Compressor Section: Level Control (Attack, Release, Ratio, Threshold, Gain) Soft Knee Switch Bypass Switch Hi-pass Sidechain Filter Equalizer Section: 3 Band Parametric 80 Hz Filter Switch Bypass Switch Master Section: Level Control Gain Reduction to Meter Button...
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Page 10: Preamplifier
SATURATION CONTROL: Selects the amount of increase (0% to 100%) applied to the even harmonic series of the signal being amplified by the EUREKA. The effect of manipulating the harmonic distortion is of increasing or decreasing the apparent “... -
Page 11: Compressor
This is a very useful feature for rapidly reducing the level coming into the EUREKA and thus preventing the input signal from over-driving (distorting) the input. This may occur due to high output level from a microphone or other device. Padding the input serves to provide increased “... - Page 12 CONTROLS & CONNECTIO NS THRESHOLD: Sets the level at which compression begins. The below and above LED’ s over the Threshold knob indicate whether the input signal is below or above the Threshold setting. When the signal is above the Threshold setting, it becomes ‘...
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Page 13: Equalizer
If the gain is set to 0, this control will have no effect. The Q on the Eureka ranges from 0.4 (wide) to 2.0 (narrow). In octaves the Q on the Eureka ranges from 3 octaves to 2/3 octaves. -
Page 14: Master
CONTROLS & CONNECTIO NS 2 . 5 M A S T E R MASTER (LEVEL): This control adjusts the output level of the EUREKA. It functions as a master fader for the entire processing strip. It is useful for adjusting the overall output level up or down to match the optimum input level of a recorder, mixer, etc. -
Page 15: Power Supply
CONTROLS & CONNECTIO NS Connectors All Input and Output connectors are servo balanced. XLR or ¼” TRS with the following wiring standard: XLR/TRS PIN 1 / Sleeve PIN 2/ Tip High PIN 3/ Ring INSERT: Return and Send connectors are provided for use in conjunction with audio process devices such as reverbs, delays, de-essers, etc. - Page 16 CONTROLS & CONNECTIO NS The Power Jack on your EUREKA accepts a standard IEC cord like those found on most computers and professional recorders. The Power button on the Eureka is located next to the Power Jack. Note: The input power voltage is set at the factory to correspond with the country in...
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Page 17: Operation
48V phantom power. Microphone Input Impedance You can adjust the input impedance on the Eureka to match or “ tune” a particular microphone to achieve a desired sound. Most microphone preamplifiers have a fixed microphone input impedance of 1000 to 2000 ohms. The Eureka has five different impedance values to select from: 50, 150, 600, 1500 and 2500. -
Page 18: 192K/24-Bit Digital Output Card
OPERATION processor. The signal is now routed out of the EUREKA, into the external processor, then back into the EUREKA. The final, processed signal will be available at the EUREKA output connector. The Send and Return signal will be inserted after the microphone preamplifier, before the compressor. -
Page 19: Application Settings
3 . 4 A P P L I C A T I O N S E T T I N G S The following are application settings to get you started in using your Eureka. Feel free to experiment by pushing any and all buttons and turning knobs to their extreme values - remember there are no rules when creating music. - Page 20 OPERATION 2. Acoustic Guitar Compressor settings Thresh Ratio Gain Soft Bypass Attack Release SC-HP Fast Equalizer settings HIGH EQ>Comp Gain Freq Gain Freq Gain Freq Wide 18.5k Nar = Narrow Q 3. Electric Guitar Compressor settings Thresh Ratio Gain Soft Bypass Attack Release...
- Page 21 OPERATION 2.2k Wide 4. Bass Guitar Compressor settings Thresh Ratio Gain Soft Bypass Attack Release SC-HP Equalizer settings HIGH EQ>Comp Gain Freq Gain Freq Gain Freq Wide 2.2k MN – Medium Narrow, MW – Medium Wide 5. Keyboards Compressor settings Thresh Ratio Gain...
- Page 22 OPERATION EQ>Comp Gain Freq Gain Freq Gain Freq Wide 2.2k Wide 6.5k MN-Medium Narrow 6. Kick Drum Compressor settings Thresh Ratio Gain Soft Bypass Attack Release SC-HP Equalizer settings HIGH EQ>Comp Gain Freq Gain Freq Gain Freq Wide Wide 2.5k 7.
- Page 23 OPERATION EQ>Comp Gain Freq Gain Freq Gain Freq Wide 8. Drum Overheads Compressor settings Thresh Ratio Gain Soft Bypass Attack Release SC-HP Fast Fast Equalizer settings HIGH EQ>Comp Gain Freq Gain Freq Gain Freq Wide Wide...
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Page 24: Technical
4 TECHNICAL EUREKA SPECIFICATIONS Channels ....................ONE Dynamic Range ................. >115dB Headroom..................+22dBu Frequency Response .............. 10Hz to 50kHz Internal Operating Level............... 0dBu = 0dB Microphone /Instrument Preamplifier Gain ..................+ 12dB to +52dB Noise Floor..............-112dBu (+12dB gain) EIN ..................... -127dB THD + Noise(0% Saturation) ............ - Page 25 TECHNICAL High Pass Sidechain Filter (variable) ........10Hz to 10kHz Metering ........Analog VU (Gain Reduction/Output Level) Equalizer Low Band (+/-10dB)..............20Hz – 300Hz Mid Band (+/-10dB)..............200Hz to 3kHz High Band )+/- 10dB) ..............2kHz – 20kHz Q (variable all bands)......Q=0.4 to 2 (3 octave to 2/3 octave) Master Output Fader ................-70dB to + 10dB Output Connectors..XLR Balanced and 1/4”...
- Page 26 TECHNICAL As a commitment to constant improvement, PreSonus Audio Electronics, Inc. reserves the right to change any specification stated herein at any time in the future without notification.