Presonus Eureka Recording Channel Strip
The Eureka is a professional recording channel strip containing a discrete class A transformer-coupled microphone preamplifier, FET 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. 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 FET 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.
Features
- 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
- Optional 24-Bit/192k Digital Output Card
- Transparent, wide range performance
Specifications General
Channels: One
Dynamic Range: >115dB
Headroom: +22dB
Frequency Response: 10Hz to 50kHz
Internal Operating Level: 0dBu = 0B
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.
