Presonus EUREKA Mic Preamp

PRESONUS EUREKA Details ^top

Strike Gold With The Eureka!
The Eureka channel strip device features a Class A transformer - coupled mic preamp with variable impedance as well as a saturation knob for tube saturation emulation.

The Eureka sports a compressor with variable threshold, attack, release and gain makeup. It offers a soft knee compression mode, as well as a hi-pass filter on the sidechain for frequency dependent compression, which is useful for de-essing and other frequency specific compression applications.

The Eureka, complete with an audio transformer on the input stage, offers a fully-parametric three-band EQ with overlapping bands and switchable staging for the EQ and compressor, enabling you to swap the order of the EQ and compression.

The Eureka has instrument, line and microphone inputs as well as switchable gain reduction for the VU meter, dual outputs (TRS and XLR) that can be used simultaneously and an optional digital output card capable of up to 24-bit 96khz output on AES/EBU or S/PDIF. In addition, the unit has a 48V Phantom power unit with an 80Hz rumble filter, a --20dB pad, a phase inversion button and balanced send and return jacks for inserting outboard gear.

Preamp

• Award-winning Class A transformer-coupled mic preamp

• Variable impedance -- especially useful for ribbon microphones

• Saturation knob for tube saturation emulation

• 48V Phantom power

• 80 Hz rumble filter

• -20dB pad

• phase inversion button

Compressor
[*]Full featured compressor: variable threshold, attack, release, ratio, gain makeup
[*]Hi pass filter on the sidechain -- allows for de-essing and other frequency specific compression applications
[*]Soft knee compression mode[/list]
Equalizer
[*]Fully parametric three band equalizer with overlapping bands
[*]Switchable staging for the EQ and compressor -- place the compressor before the EQ or vice-versa[/list]

Additional Features:

• Gain Reduction or Output metering for VU meter (switchable)

• Balanced Send and Return Jacks for Inserting Outboard Gear

• Instrument, line and microphone input

• Dual outputs: TRS and XLR. Both can be used simultaneously

PRESONUS EUREKA Specs ^top

Technical Specifications

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.