1. Manuals
  2. Brands
  3. Eureka Manuals
  4. Amplifier
  5. Microphone Preamplifier
  6. User manual

Eureka Microphone Preamplifier User Manual

Eureka microphone preamplifier user's manual
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
EUREKA
M I C R O P H O N E P R E A M P L I F I E R
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
version 3.0
© 2003-2007, Pr e S o n u s A u d i o E l e c t r o n i c s , I n c o r p o r a t e d .
A l l r i g h t s r e s e r ve d .

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Microphone Preamplifier and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Summary of Contents for Eureka Microphone Preamplifier

  • Page 1 EUREKA M I C R O P H O N E P R E A M P L I F I E R 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...
  • Page 2 W A R R A N T Y PreSonus Limited Warranty PreSonus Audio Electronics Inc. warrants this product to be free of defects in material and workmanship for a period of one year from the date of original retail purchase. This warranty is enforceable only by the original retail purchaser.

  • Page 3: 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 3.5 Specifications...

  • Page 4: Overview

    Thank you for purchasing the PreSonus EUREKA. PreSonus Audio Electronics has designed the EUREKA utilizing high-grade components to insure optimum performance for an infinite period of time. We believe the EUREKA to be an exceptional sounding unit and an exceptional value. We encourage you to contact us at 1-800-750-0323 with any questions or comments you may have regarding your PreSonus equipment.
  • Page 5 • +22dBu Headroom. The EUREKA mic-pre has +22 dBu of headroom. This feature gives you wide dynamic range and excellent transient response characteristics. • Saturation Control. The EUREKA offers a very high quality transformer...
  • Page 6 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.

  • Page 7: Controls And 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 8 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 •...

  • Page 9: Preamplifier

    IMPEDANCE SELECTOR: Selects the amount of resistance that is applied to the microphone input. This selector allows you to match (or intentionally mismatch) the input impedance of the Eureka with the impedance of your microphone. As the Eureka’s impedance is lowered, different filtering effects can result delivering a tailored sound for a particular application.

  • Page 10: 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.
  • Page 11 CONTROLS & CONNECTIONS Basically, as you turn the Threshold knob counter-clockwise, the input signal is compressed. (If you have a ratio setting of greater than 1:1.) RATIO: Sets the compression slope. This is defined as the output level versus the input level. For example, if you have the Ratio set to 2:1, any signal level above the Threshold setting will be compressed at a compression ratio of 2:1.

  • Page 12: 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 13: Master

    CONTROLS & CONNECTIONS 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 14: Power Supply

    2 . 7 P O W E R S U P P L Y 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.

  • Page 15: 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 16: 192K/24-Bit Digital Output Card

    OPERATION 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. 3.3 192K/24-BIT DIGITAL OUTPUT CARD (OPTIONAL) A 192K/24-BIT Digital Output Card is available as an option for the PreSonus EUREKA.

  • Page 17: 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 18: Acoustic Guitar

    2. Acoustic Guitar Compressor settings Thresh Ratio Gain Equalizer settings EQ>Comp Gain Freq Nar = Narrow Q 3. Electric Guitar Compressor settings Thresh Ratio Gain Equalizer settings EQ>Comp Gain Freq OPERATION Soft Bypass Attack Release Fast Gain Freq Wide Soft Bypass Attack Release...

  • Page 19: Bass Guitar

    4. Bass Guitar Compressor settings Thresh Ratio Gain Equalizer settings EQ>Comp Gain Freq Wide MN – Medium Narrow, MW – Medium Wide 5. Keyboards Compressor settings Thresh Ratio Gain Equalizer settings EQ>Comp Gain Freq Wide MN-Medium Narrow OPERATION Soft Bypass Attack Release Gain...
  • Page 20 6. Kick Drum Compressor settings Thresh Ratio Gain Equalizer settings EQ>Comp Gain Freq Wide 7. Snare Compressor settings Thresh Ratio Gain Equalizer settings EQ>Comp Gain Freq OPERATION Soft Bypass Attack Release Gain Freq Wide Soft Bypass Attack Release Gain Freq Wide SC-HP HIGH...

  • Page 21: Drum Overheads

    OPERATION 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...

  • Page 22: 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) ... <0.005% THD + Noise (Full Saturation)...
  • Page 23 TECHNICAL 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 ...

This manual is also suitable for:

Eureka - v 3.0

Table of Contents

Save PDF