Tech Talk

Advantages of the SPL dual-stage preamplifier

The GoldMike's engine is the newly designed SPL dual-stage preamplifier. During the first stage of amplification the signal is amplified by a semi-conductor circuit while the second stage applies tube electronics. We achieve a high common-mode-rejec- tion by using laser trimmed components. Likewise, minimal noise and distortion figures distinguish our high-quality preamp. Analog Device's semi-conductor (SSM2017) is very unreceptive to HF and hum interference, and is perfectly integrated by the PCB layout; wide PCB conductors guarantee a stable power supply even when extreme level changes demand an immediate current supply. The star ground wiring scheme ensures a quiet electronic performance. The dimensions of the PCB conductors, and their respective layout (wide or narrow), were especially designed for the integration of tubes and ICs in the preamplification circuitry. The MIC GAIN potentiometer adjusts the semi-conductor stage, allowing amplification up to 2200 times the original signal. The following secondary tube stage adds a constant 6 dB of gain; therefore, the same amount of tube character is added regardless of amplification. The MIC GAIN should be adjusted for a "0" VU meter reading. At this level the best signal-to-noise performance is achieved and the tube will perform in its ideal sonic range. (Please note that the VU readings are not peak PPM but average levels. In other words, watch out for the meter hitting the red.)

In summary, our dual-stage design maximises the amplification power and signal-to-noise performance of the SPL semi- conductor at the first stage and then maximises the warmth and liveliness of a meticulously selected and tested ECC 83 tube at the second stage. This makes the GoldMike an ideal partner for high- end HD recording. The unit's dynamic range of 111 dBu even outperforms some 24-bit recording gear.

The GoldMike combines superb signal-to-noise specs with not only the amplification power of semi- conductors but also the warmth and liveliness of tubes.

An outstanding dynamic range of 111 dBu outperforms even the average 24-bit recording system.

Advantages of the dual mono design

GoldMike's two mono amplifier blocks are designed with a central power supply that utilises a star ground wiring scheme. Chief advantages of this particular layout are the excellent channel separation and, respectively, the low crosstalk figures.

In your daily work you will find many practical applications for these advantages. You may use the GoldMike's channels for a snare and a vocal (arguably the most important elements in a mix) simultaneously. Stereo recordings, benefiting in particular from the low crosstalk figures, will have wider stereo depth and precise spatial definition. Another advantage of the central power supply with a star ground wiring scheme is that the two indivi- dual circuitries, operating discretely, can deliver identical sonic performances per channel. The current demands of one channel (i.e., snare) are not compromised by the current demands of the other channel (i.e., vocal). All power supplying conductors, layed out identically and symmetrically, provide both channels with the necessary current.

Dual-Mono-Layout,with central power supply and star grounding, delivers excellent channel separation

•two discrete signals (snare,vocal) may be recorded simultaneously without crosstalk

•precise spatial definition

•identical sonic performance per channel

9844 specifications

The Sound Performance Lab 9844 is a cutting-edge audio processing device that has gained popularity among audio engineers, producers, and musicians for its remarkable sound manipulation capabilities. Known for its ability to enhance audio quality and provide unparalleled features, the SPL 9844 is a perfect addition to any professional or home studio setup.

At the heart of the SPL 9844 is its revolutionary technology that integrates high-performance analog circuitry with digital precision. This hybrid approach allows for a seamless blend of warmth and clarity, preserving the natural characteristics of sound while providing tools for detailed manipulation. The device utilizes advanced analog signal processing that ensures low noise and high dynamic range, making it an essential tool for capturing and refining audio.

One of the standout features of the SPL 9844 is its four-channel processing capability, allowing simultaneous management of multiple audio signals. This multi-channel architecture is particularly beneficial for those working with complex arrangements or live sound setups. The device includes precise metering for each channel, providing users with real-time visual feedback to monitor levels and optimize their settings effectively.

Additionally, the SPL 9844 is equipped with a variety of processing functions including equalization, compression, and saturation. The equalizer section offers a wide range of adjustable frequencies, enabling precise tonal shaping for individual tracks or full mixes. The built-in compressor provides dynamic control, ensuring that audio levels remain consistent and professional-sounding. The saturation feature adds harmonic richness and character, helping to achieve a more polished sound.

Another characteristic of the SPL 9844 is its intuitive user interface. The clear layout and well-placed controls make it easy to navigate, allowing users to focus on their creativity instead of struggling with complicated settings. The device is designed for quick adjustments, ensuring an efficient workflow during recording and mixing sessions.

In terms of connectivity, the SPL 9844 supports a variety of input and output options, including balanced analog connections, which are essential for maintaining signal integrity. This versatility allows for easy integration with a range of other studio equipment.

In summary, the Sound Performance Lab 9844 stands out as a premier audio processing device, featuring a combination of advanced technologies, multi-channel processing, and an array of powerful effects. Its robust build and user-friendly interface make it an invaluable tool for audio professionals who seek quality and precision in their sound design. With the SPL 9844, users can elevate their audio productions to new heights.