Eureka Microphone Preamplifier manual

EUREKA MICROPHONE PREAMPLIFIER COMPRESSOR PARAMETRIC EQUALIZER USER’S MANUAL version 3.0 © 2003-2007, P r e S onus Audio Electronics, Incorporated. All rights reserved.[...]

WARRANTY PreSonus Limited Warranty PreSonus Audio Electronics Inc. warrants this product to be free of defects in material and workmanship for a period of one y ear from the date of original retail purchase. This warranty is enforceable onl y by the original retail purc haser. To be protected by this warranty , the purchaser must comple te and retu[...]

TABLE OF CONTENTS 3 1 Overview 1.1 Introduction 4 1.2 Features 4 2 Controls & Connections 2.1 Front Panel Basic Layout 7 2.2 Preamplifier 9 2.3 Compressor 10 2.4 Equalizer 12 2.5 Master 13 2.6 Back Panel 13 2.7 Power Supply 14 3 Operation 3.1 Microphones 15 3.2 Send and Return 15 3.3 192k/24-Bit Digital Output Card 16 3.4 Application Settings 1[...]

1 OVERVIEW 4 1.1 INTRODUCTION 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 except ional value. We encourage you to contact us at 1-800-750-0[...]

OVERVIEW 5 chance of over-driving the i nput and avoiding distortion. • +22dBu Headroom. The EUREKA mic-pre has +22 dBu of headroom. This feature gives you wide dyna mic range and excellent transient response characteristics. • Saturation Control. The EUREKA offers a very high quality transformer and features an SATURATION control (this control[...]

OVERVIEW 6 3-Band Parametric Equalizer . Total tonal control is what the Equalizer section provides. The EQ will let you fine tune the sound to suit your taste with exacting precision. • By pass Switch. A bypass switch is provided to audition the signal in an equalized version as compared to a direct unaffected signal. • Variable Q . Adjusts th[...]

2 CONTROLS & CONNECTIONS 7 2.1 FRONT PANEL BASIC LAYOUT The front panel of the EUREKA is divided into four sections – Preamplifier, Compressor, Equalizer and Master. Preamplifier section: • Gain Control • Impedance Control • Saturation Control • +48 Volt Switch • -20db Pad • Phase Reverse Button • 80Hz Filter • Line Input Sele[...]

CONTROLS & CONNECTIONS 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 • Gain Reduction to Meter Button[...]

CONTROLS & CONNECTIONS 9 2.2 PREAMPLIFIER GAIN: Provides +52dB of gain for the microphone input and +44dB of gain for the instrument input. IMPEDANCE SELECTOR: Selects the amount of resi stance that is applied to the microphone input. This selector allows you to match (or intentionally mismatch) the input impedance of the Eureka with the impeda[...]

CONTROLS & CONNECTIONS 10 XLR connector wiring for Phantom Pow er Pin 1= GND Pin 2= +48V Pin3= +48V PAD: Engaging the Pad switch provides - 20dB of attenuation with the push of a button. This is a very useful feature fo r rapidly reducing the level coming into the EUREKA and thus preventing the input signal from over-driving (distorting) the in[...]

CONTROLS & CONNECTIONS 11 Basically, as you turn the Threshold knob counter-clockwise, the input signal is compressed. (If you have a ra tio 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 Thresh[...]

CONTROLS & CONNECTIONS 12 2.4 EQUALIZER The EQ is divided into three sections or bands (Low, Mid and High) Each band has the following controls: GAIN : Controls the amount of cut or boos t of the corresponding frequency. Each gain control offers +/-10dB of attenuation. FREQUENCY : Selects the center frequency of equaliz ation. If the gain is se[...]

CONTROLS & CONNECTIONS 13 2.5 MASTER 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. GR TO METER: When pushed the VU meter reads Gain Redu[...]

CONTROLS & CONNECTIONS 14 All Input and Output connectors are serv o balanced. XLR or ¼” TRS with the following wiring standard: XLR/TRS PIN 1 / Sleeve GND PIN 2/ Tip High (+) PIN 3/ Ring Low (-) INSERT: Return and Send connectors are provided for use in conjunction with audio process devices such as reve rbs, delays, de-essers, etc. NOTE: T[...]

3 OPERA TION 15 3.1 MICROPHONES The Eureka works great with all types of microphones including dynamic, ribbon and condenser microphones. Dynamic microphones and ribbon microphones are generally lower output devices and require no external power source. Condenser microphones are generally more sensitive than dynamic and ribbon microphones and typic[...]

OPERATION 16 into the external processor, then ba ck 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[...]

OPERATION 17 3.4 APPLICATION SETTINGS 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. Let your imagination and ear guide and direct the way you set your Eureka. Note that[...]

OPERATION 18 2. Acoustic Guitar Compressor settings Thresh Ratio Gain Soft Bypass Attack Release SC-HP -20 3 +2 In Out Mid Fast 10 Equalizer settings LOW MID HIGH EQ>Comp Q Gain Freq Q Ga in Freq Q Gain Freq Out n/a 0 n/a Nar -2 3k Wide +3 18.5k Nar = Narrow Q 3. Electric Guitar Compressor settings Thresh Ratio Gain Soft Bypass Attack Release SC[...]

OPERATION 19 4. Bass Guitar Compressor settings Thresh Ratio Gain Soft Bypass Attack Release SC-HP -15 7 +4 In Out MF MS 10 Equalizer settings LOW MID HIGH EQ>Comp Q Gain Freq Q Ga in Freq Q Gain Freq Out Wide +6 85 MN -3 2.2k n/a 0 n/a MN – Medium Narrow, MW – Medium Wide 5. Keyboards Compressor settings Thresh Ratio Gain Soft Bypass Attack[...]

OPERATION 20 6. Kick Drum Compressor settings Thresh Ratio Gain Soft Bypass Attack Release SC-HP -18 5 +2 Out Out MF MF 80 Equalizer settings LOW MID HIGH EQ>Comp Q Gain Freq Q Ga in Freq Q Gain Freq In Wide +8 60 Nar -8 400 Wide + 6 2.5k 7. Snare Compressor settings Thresh Ratio Gain Soft Bypass Attack Release SC-HP -22 6 +4 In Out Med Med 10 E[...]

OPERATION 21 8. Drum Overheads Compressor settings Thresh Ratio Gain Soft Bypass Attack Release SC-HP -22 5 Fast Out Out Fast Med 400 Equalizer settings LOW MID HIGH EQ>Comp Q Gain Freq Q Ga in Freq Q Gain Freq Out Wide -4 40 n/a 0 n/a Wide +2 20k[...]

4 TECHNICAL 22 EUREKA SPECIFICATIONS Channels .................................................................................................... ONE Dynamic R ange ..................................................................................... > 115dB Headroom ..............................................................................[...]

TECHNICAL 23 Equalizer Low Band (+/-10dB ) ................................................................... 20H z – 300Hz Mid Band (+/-10dB) .................................................................... 200H z to 3kHz High Band )+/- 10dB) .................................................................. 2kHz – 20kHz Q (variable all b[...]