OVERVIEW

chance of over-driving the input and avoiding distortion.

•+22dBu Headroom. The EUREKA mic-pre has +22 dBu of headroom. This feature gives you wide dynamic range and excellent transient response characteristics.

•Saturation Control. The EUREKA offers a very high quality transformer and features an SATURATION control (this control adjusts the drain current on the input FET amplifier altering the even harmonic levels of the signal being passed) with an adjustment range of 0% to 100%. The 0% position passes a pure signal. As the control is rotated to the 100% position, the signal’s even harmonic series is boosted giving the signal “warmth” very much like a vacuum tube or similar to the sound of analog tape saturation. This remarkable effect gives you the sound 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 impedance is also effective for dynamic and condenser microphones and can be the perfect solution for a given recording application.

•Phase Reverse. Use the phase reverse switch to combat phase cancellation with other open microphones.

Full Featured Compressor with High Pass Filter. The EUREKA is equipped with a Compressor with a high pass side chain filter designed especially for frequency specific processing.

•Soft Knee Compression. Soft Knee Compression causes the compression to set in gradually producing a more musical response

•Bypass. The Bypass switch lets you compare the compressed sound quickly to the uncompressed sound.

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Eureka Microphone Preamplifier user manual Overview
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Microphone Preamplifier specifications

The Eureka Microphone Preamplifier is a versatile and high-performance tool designed for audio professionals seeking clarity and detail in their recordings. Known for its exceptional sound quality and innovative features, the Eureka has become a popular choice for both studio and live sound applications.

One of the standout features of the Eureka is its Class A vacuum tube circuitry, which provides a warm and rich tonal character to the audio signal. This analog warmth is complemented by the preamp's exceptional bandwidth, allowing for a natural representation of the sound source. The use of high-quality components contributes to its low noise floor, ensuring that even the most delicate sounds are captured with precision.

The Eureka preamp is equipped with an impressive gain range, enabling users to amplify their microphones effectively without compromising sound quality. Its gain is adjustable up to 64 dB, which makes it suitable for a wide variety of microphones, including low-output dynamic mics and high-sensitivity condenser mics. This flexibility ensures that it can adapt to any recording scenario, whether it's capturing vocals, instruments, or ambient sounds.

Another noteworthy characteristic of the Eureka is its built-in high-pass filter, which eliminates unwanted low-frequency rumble and wind noise. This feature is particularly advantageous for field recording and live situations, allowing users to achieve a cleaner and more focused sound. Additionally, the preamp features a phase reverse switch, which is essential for combating phase issues when using multiple microphones.

The Eureka's user-friendly design includes LED metering for input level monitoring, providing real-time feedback on the signal's strength. This visual aid helps engineers make informed decisions about gain settings, ensuring optimal headroom and preventing clipping.

For connectivity, the Eureka offers both XLR and 1/4-inch outputs, making it compatible with a wide range of audio interfaces and mixing consoles. The robust build quality ensures that it withstands the rigors of both studio and live environments, making it a reliable choice for audio professionals.

In summary, the Eureka Microphone Preamplifier combines advanced technology with practical features, delivering outstanding sound quality and versatility. Its Class A vacuum tube circuitry, adjustable gain, high-pass filter, and solid build make it an essential tool for anyone serious about their audio recordings.
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