PRESONUS EUREKA - SCHEMA User Manual Download Page 1

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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

v ersion 1.0

2003, PreSonus Audio Electronics, Incorporated.

Summary of Contents for EUREKA - SCHEMA

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 version 1 0 2003 PreSonus Audio Electronics Incorporated All rights reserved ...

Page 2: ...ce This warranty does not cover claims for damage due to abuse neglect alteration or attempted repair by unauthorized personnel and is limited to failures arising during normal use that are due to defects in material or workmanship in the product Any implied warranties including implied warranties of merchantability and fitness for a particular purpose are limited in duration to the length of this...

Page 4: ... 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 17 4 Technical 3 5 Specifications 22 ...

Page 5: ...e of noise problems found in studio or live sound environments We would like to suggest that you use this manual to familiarize yourself with the features applications and correct connection procedure for your 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 2 F E A T U R E S The following informatio...

Page 6: ...d of a tube without the headache of uneven performance often encountered with vacuum tube devices no tube to pick up RF or to age and become microphonic Variable Microphone Input Impedance This feature enables you to tune your microphone by matching the output impedance of your microphone with your microphone preamplifier This works especially well for ribbon microphones Changing the input impedan...

Page 7: ...ches the order of the signal chain putting EQ before the Compressor Master Section 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 The...

Page 8: ...The front panel of the EUREKA is divided into four sections Preamplifier Compressor Equalizer and Master Preamplifiersection Gain Control Impedance Control Saturation Control 48 Volt Switch 20db Pad Phase Reverse Button 80Hz Filter Line Input Select Button LED Input Meter ...

Page 9: ...tion 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 ...

Page 10: ...e signal being amplified by the EUREKA The effect of manipulating the harmonic distortion is of increasing or decreasing the apparent warmth of the signal This feature is derived from manipulating the drain current of the FET input buffer of the Mic Preamp Experiment with the SATURATION control and see what type of sounds you can get from your present microphone selection LINE Selects the line inp...

Page 11: ...ihood of input signal overload 80Hz The 80Hz button is a low end roll off filter When pushed in the 80Hz button causes all frequencies below 80Hz to beattenuated dropped by 12dB This filter can be handy in live and studio applications For example the 80Hz filter can help to reduce the boominess or muddiness of a vocal and improve the overall clarity Ø Phase Reverse Reverses the polarity of the sig...

Page 12: ...be limited to an output of 0 dB regardless of the input signal ATTACK Sets the speed at which the compressor acts on the input signal A slow attack time fully clockwise allows the beginning envelope of a signal commonly referred to as the initial transient to pass through the compressor uncompressed whereas a fast attack time fully counterclockwise immediately subjects the signal to the Ratio and ...

Page 13: ...cy Each gain control offers 10dB of attenuation FREQUENCY Selects the center frequency of equalization If the gain is set to 0 this control will have no effect Q Bandwidth Controls the width of the frequency being adjusted Q is defined as the ratio of the center frequency divided by bandwidth 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 n...

Page 14: ...ter 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 Reduction of the Compressor When not pushed the VU meter reads output level 2 4 B A C K P A N E L B A S I C L A Y O U T ...

Page 15: ...ng 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 processdevices such as reverbs delays de essers etc NOTE The LINE IN jack does not work unless the LINE button on the front of the unit is pushed in 2 7 P O W E R S U P P L Y ...

Page 16: ...cepts 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 which it was shipped ...

Page 17: ... different impedance values to select from 50 150 600 1500 and 2500 Refer to your microphone specifications to find the microphone output impedance and experiment with matching the Eureka s input impedance with the microphone s output impedance As the impedance on the Eureka is lowered a resistive load is put on the microphone This will not damage a microphone However lowering or raising the imped...

Page 18: ...2K 24 BIT Digital Output Card is available as an option for the PreSonus EUREKA It has AES EBU and SPDIF output connectors as well as an auxiliary TRS analog Line input connector The card has a selectable sample rate of 192kHz 96kHz 48kHz and 44 1kHz The A D converters provide psycho acoustic dithering for improved BIT resolution when conversion from 24 BIT to 16 BIT sampling is necessary The TRS ...

Page 19: ...ings do not include the main preamplifier controls GAIN IMPEDANCE and SATURATE Set these preamplifier controls with the compressor and EQ in bypass for initial levels and tonal quality Use the 80Hz hi pass filter to roll off low frequency rumble and muddiness Once you get a sound that you like go back to the IMPEDANCE and SATURATE controls to further tailor your sound 1 Vocal CompressorSettings Th...

Page 20: ... Fast 10 Equalizersettings LOW MID HIGH EQ Comp Q Gain Freq Q Gain Freq Q Gain Freq Out n a 0 n a Nar 2 3k Wide 3 18 5k Nar NarrowQ 3 Electric Guitar Compressorsettings Thresh Ratio Gain Soft Bypass Attack Release SC HP 18 5 1 In Out Fast Mid 10 Equalizersettings LOW MID HIGH EQ Comp Q Gain Freq Q Gain Freq Q Gain Freq ...

Page 21: ...ack Release SC HP 15 7 4 In Out MF MS 10 Equalizersettings LOW MID HIGH EQ Comp Q Gain Freq Q Gain Freq Q Gain Freq Out Wide 6 85 MN 3 2 2k n a 0 n a MN MediumNarrow MW MediumWide 5 Keyboards Compressorsettings Thresh Ratio Gain Soft Bypass Attack Release SC HP 22 4 4 Out Out MF MS 60 Equalizersettings LOW MID HIGH ...

Page 22: ...sorsettings Thresh Ratio Gain Soft Bypass Attack Release SC HP 18 5 2 Out Out MF MF 80 Equalizersettings LOW MID HIGH EQ Comp Q Gain Freq Q Gain Freq Q Gain Freq In Wide 8 60 Nar 8 400 Wide 6 2 5k 7 Snare Compressorsettings Thresh Ratio Gain Soft Bypass Attack Release SC HP 22 6 4 In Out Med Med 10 Equalizersettings LOW MID HIGH ...

Page 23: ...t n a 0 n a Med 2 1k Wide 2 20k 8 Drum Overheads Compressorsettings 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 Gain Freq Q Gain Freq Out Wide 4 40 n a 0 n a Wide 2 20k ...

Page 24: ...strument Input Connector TS Instrument Input Impedance 1 Meg Ohm Send Connector 1 4 TRS Balanced Unbalanced Send Output Impedance 51 Ohms Return Connector 1 4 TRS Balanced Unbalanced Return Input Impedance 10K Ohms Metering 3 LED 20dBu 0dBu Clip Line input switchable TRS 10k Ohm Input Impedance Phantom Power switchable 48V Pin 1 Pin 2 XLR Pad switchable 0dB 20dB Phase switchable 0 180º Hi pass Fil...

Page 25: ...ds Q 0 4 to 2 3 octave to 2 3 octave Master Output Fader 70dB to 10dB Output Connectors XLR Balanced and 1 4 TRS Balanced Unbalanced Output Impedance 51Ohms Metering Output level Analog VU 20dBu 6dBu Metering Gain reduction Analog VU 20dB 0dB Output Headroom 22dBu Physical Power Supply Internally Regulated Linear Type Power Requirements factory configure 100 120VAC 200 240VAC Size 1U Rack 19 x 1 7...

Page 26: ...TECHNICAL 25 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 ...

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