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PreSonus Eureka Channel Strip

Dolphin id:3856 Product SKU:HIHEUREKA

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The Eureka is a professional recording channel strip containing a discrete class A transformer-coupled microphone preamplifier, compressor, and three-band parametric equalizer. The microphone preamplifier features variable input impedance so that the Eureka can be matched and & tuned for all types of microphones and recording applications.

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The EUREKA Pro Recording Channel

The Class A transformer-coupled microphone preamplifier also features "SATURATE" which adjusts the drain current on the input FET amplifier to simulate of the effects of tape saturation and tube "warmth".

The Eureka's ultra fast compressor has both soft and hard knee compression as well as a separate make up gain stage and hi-pass side chain compression to deliver hard pumping to ultra transparent compression and everything in between. The Eureka's three-band fully parametric EQ gives you variable Q (bandwidth) on each band as well as an EQ pre COMP switch to put the EQ before the Compressor in the signal path. The equalizer has overlapping frequency selection on each band for total tonal control and shaping.

The Eureka is loaded with microphone, line and instrument input so you can use it as a front end preamplifier for recording with microphones, guitars, keyboards, synths as well as a compressor/equalizer on a single channel during mixdown. The Eureka also has balanced send and return jacks so that you can insert your favorite outboard processor before the compressor/EQ to further enhance and customize your sound.

An optional 24 Bit/192kHz digital output card (AD192) is available for the Eureka to further optimize sonic performance. The Eureka's AD192 digital output card is loaded with both SPDIF and AES/EBU outputs, word clock I/O as well as a balanced TRS line input so that only one output card is necessary when using two Eureka's in stereo or dual mono situations.

The Eureka gives you the sonic performance and control you need in the real-world to produce professional quality audio that you, your customers and your fans deserve!

Customer Comments

"PreSonus has a winner on their hands with Eureka. It’s a well-built, high-performing channel strip at an affordable price. At under $700 retail, Eureka stands out in the crowd. Its specs and feature list are cool — transformer-coupled input, flexible signal path, good processing capabilities, etc. — but its outstanding attribute is its open, detailed sound. It would make a great choice as a front-end for a DAW." - EQ Magazine -- read the reivew

"You will not find as many features on a channel strip of this quality for this price anywhere else." - TapeOp Magazine -- read the review

"Vocals tracked through the Eureka were stunning. The preamp stage is quite transparent, yet natural sounding. When using the Eureka to amplify other sources, the results were consistently impressive."
Stefan, Christian Musician Magazine --
read the review

"Well, I guess it doesn't pay to judge a pre-amp by its cover/price. The sound was way above what I was expecting. This is really great for vocals, bass tracking or re-amping. The compressor is worth the price of the unit alone."
Sean, CA --
more user comments


  • Class A High Headroom Transformer Coupled Microphone Preamplifier
  • Variable Microphone Input Impedance
  • Variable SATURATE control (simulates tape saturation and tube warmth)
  • Fully Variable Compressor with Hi-pass Side Chain
  • Three Band Fully Parametric Equalizer 
  • EQ Pre or Post Compressor 
  • High Headroom Output Section 
  • Very Low Noise Design 
  • Internal Power Supply 
  • Transparent, wide range performance 
  • Optional 24-Bit/192k Digital Output Card (AD192)

Technical Specifications

  • Channels - One
  • Dynamic Range - >115dB
  • Headroom - +22dB
  • Frequency Response - 10Hz to 50kHz
  • Internal Operating Level - 0dBu = 0B
  • Microphone Preamp
    • Input Impedance, XLR Input - 1.3k Ohms
    • Input Impedance, Line Level Input - 10k Ohms
    • Connectors - Neutrik™ Combo
  • Microphone Preamp
    • Gain - +12dB to +52dB
    • Noise Floor - -112dBu (+12dB gain)
    • EIN - -127dB
    • THD + Noise (0% saturation) - <0.005%
    • THD + Noise (full saturation) - <0.5%
    • Microphone Input Connector - XLR
    • Microphone Input Impedance (selectable) - 2.5k, 1.5k, 600, 150, 50 Ohms
    • Instrument Input Connector - 1/4" 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) - 1/4" TRS, 10k Ohm Input Impedance
    • Phantom Power (switchable) - +48V (pin 1, pin 2 XLR)
    • Pad (switchable) - 0dB/-20dB
    • Phase (switchable) - 0, 180 degrees
    • Hi-pass filter (switchable) - -3dB shelf at 80Hz
  • Compressor
    • Threshold (variable) - -40dBu to +20dBu
    • Ratio (variable) - 1-10 (1:1 to 2:1)
    • Attack (variable) - 0.1 to 200 ms
    • Release (variable) - 0.05 ms to 3 S
    • Gain Make-up - -20dB to +20 dB
    • Hi-pass Side Chain Filter (variable) - 10Hz to 10kHz
    • Metering - Analog VU (gain reduction / Output Level)
  • Equalizer
    • Low Band (+/-13dB) - 20Hz to 300Hz
    • Mid Band (+/-13dB) - 200Hz to 3kHz
    • High Band (+/-13dB) - 2kHz to 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" TRS balanced/unbalanced
    • Output Impedance - 51 Oms
    • Metering (output level) - Analog VU (-20dBu to +6dBu)
    • Meter (gain reduction) - Analog VU (-20dB to 0dB)
    • Output Headroom - +22dBu
  • Physical
    • Power Supply - Internally Regulated Linear Type
    • Power Requirements (factory configured) - 100VAC to 120VAC, 200VAC to 240VAC
    • Size - 1U Rack
    • Dimensions - 19" x 1.75" x 7"
    • Weight - 8lbs.
Image: PreSonus Eureka Channel Strip

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