PreSonus Eureka 1-Channel Channel Strip
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1-Channel Channel Strip
The Great Discovery
The name “Eureka” derives from a Greek word meaning “I have found it!” It was made famous by the ancient Greek scholar Archimedes, indicating exultation at a great discovery. Try the sweet-sounding, super-versatile Eureka preamp and signal processor, and you’ll discover the answer to a variety of sonic needs.
One of our best-selling products, the Eureka is equally at home in the studio or at the gig. With separate mic, line, and instrument inputs, you can employ it on almost any sound source.
Sweetening starts with our high-headroom Class A solid-state mic preamplifier, with variable input impedance to match any type of microphone. A Saturate control simulates the effects of tape saturation and tube warmth so you can go from crystal-clear to warm and rich.
The Eureka’s versatility stems in part from its malleable signal flow. The EQ can be pre- or post-compressor, and you can bypass each independently. Balanced send and return jacks enable you to insert your favorite outboard processor before the compressor and EQ. The backlit VU meter can display gain reduction or output gain.
The fast, fully variable compressor includes an internal sidechain with variable (10 Hz to 10 kHz) high-pass filter, so it can achieve anything from hard pumping to transparent compression. Its three-band, fully parametric EQ has overlapping frequency selection on each band.
With both XLR and ¼” line outputs, you can connect the Eureka to almost any recording interface, amp, or P.A. system. You can even transfer the signal digitally using the optional AD192 digital-output card, which provides word-clock I/O and two 24-bit, 192 kHz, stereo A/D converters that simultaneously feed the S/PDIF and AES/EBU digital outputs. A ¼” line input lets you use the card to provide digital output for a second Eureka.
Try the Eureka. Like the great Archimedes, you’ll be shouting, “I have found the solution!”
Eureka Features:
1 input channel with high-headroom Class A mic preamplifier
Gain control with +52 dB of gain for the mic input and +44 dB of gain for the instrument input
48V phantom power
80 Hz high-pass filter
-20 dB pad
Polarity-reverse switch
Variable microphone input impedance (50, 150, 600, 1,500, 2,500 Hz)
Variable preamp Saturate control (simulates tape saturation and tube warmth)
Line-input select button
Input clip indicator (LED)
Fast, fully variable compressor
Attack, Release, Ratio, Threshold, and (makeup) Gain
Soft/Hard Knee switch
Bypass switch
Internal sidechain with variable (10 Hz to 10 kHz) high-pass filter
3-band parametric equalizer
Gain, Frequency, and Q controls
Switchable pre-/post-compressor
Bypass switch
Master level control
Backlit VU meter
Gain Reduction to Meter switch (selects gain reduction or output gain)
Optional AES/EBU and S/PDIF digital-output expansion card
Input/Output
1 unbalanced ¼” instrument input (front panel)
1 balanced ¼” line input
1 balanced XLR mic input
1 balanced ¼” line output
1 balanced XLR line output
1 balanced ¼” insert send (output)
1 balanced ¼” insert return (input)
Digitalia
1 digital expansion-card slot for optional AD192 24-bit/192 kHz AES/EBU and S/PDIF digital output card
Physical
1U 19” rack-mountable, rugged steel chassis
Sealed, detented, metal rotary controls
Internal power supply with standard IEC connector
Eureka 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.
AD192 - Optional Digital Output Card
Bit Resolution: up to 24-Bit
Sample Rates Supported: 44.1, 48, 88.2, 96, 176.4, 192
Word Clock: In / Out via BNC Connector
Supported Digital Formats: Professional, Consumer
Simultaneous Digital Ouputs: AES/EBU and SPDIF
Analog Line Input (one AD192 card supports two Eureka's): 1/4" Balanced TRS
THD + N: 0.002 %
Signal to Noise Ratio: 114 dB
Dynamic Range: 114 dB
PRESONUS 1 YEAR WARRANTY
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