Power supply

A stable and well-filtered toro- idal-core power supply provides the basis for good sound proces- sing.

The GND Lift switching option helps remedy hum loops.

A binding post permits connection of an alternative circuit ground.

Ample filtering, smoothings and calibrations make for stable, constant service voltage.

Protective circuitry prevents premature aging or damage to components.

The phantom supply voltage is from a separate power supply with sophisticated filtering and selected components.

Special attention has been paid to the power supply of the EQ MAGIX. The power pack is the heart of any unit, and the more accurately it works, the more this improves results.

The power supply is installed around a toroidal-core transformer which does not cause any electronic humming or mechanical sounds as a result of its minimum leakage field. The primary voltage can be switched between 230 V / 50 Hz and 115 V / 60 Hz.

A 3-pole standard IEC mains connection socket serves to connect a detachable 3-pole mains lead which is included in the scope of supply. Transformer, power cable and mains connector comply with the require- ments of VDE, UL and CSA. The fuse rating is 200 mA.

The connection between ground and housing can be separated via the GND LIFT switching option. Hum loops can be remedied in this way. Eloxal has been removed from the back of the »ears« which serve to attach the unit in a 19" rack, in order to achieve 100% contact to the rack rail, in case the rack rail is used as a central ground. If the mains ground is inadequate, an alternative connection for the ground can be obtained via the binding post after activating the GND LIFT switch.

On the secondary side of the power supply, an RC combination is used to filter out noise and hum voltages from the mains side. Both half-waves are smoothed with 4700 μF capacitors in the positive and negative voltage path. Both pathes are calibrated separately via trimmers, as deviations of only a few millivolts can result in audible changes such as a diffuse sound pattern. After the calibration stage, the current is again smoothed.

Service voltage is raised gradually when the unit is switched on. This prevents voltage peaks (e.g. switch-on cracks) affecting the operational amplifiers. This safety circuit in turn prolongs the service life of the unit. Safety diodes also ensure that the power pack is not damaged if there is a short circuit within an IC.

An independent, self-contained power pack is used for the phantom power supply. It obtains unregulated AC voltage from 2 x 25 V coils in the transformer. This results in +/- 22.5 V DC via bridge rectifiers which are filtered with 1000μF. The DC voltage is adjusted to exactly 48 V in the switching power supply (LM 311) downstream. It is then smoothed again and stabilized. The power supply current flows to the intrusion point via the PCB. An RC combination stabilizes the power supply again at this point. Two medicinal 6.81 kΩ resistors with a tolerance of only 0.1% are used as bridging resistors.

EQ MAGIX specifications

Sound Performance Lab has made a significant mark in the world of audio engineering with its EQ MAGIX, an advanced equalizer plug-in designed for professional sound production. Known for its precision and versatility, EQ MAGIX is a valuable tool for music producers, sound designers, and mastering engineers.

One of the standout features of EQ MAGIX is its intuitive user interface, which allows for seamless navigation and efficient workflow. The layout is user-friendly, presenting an array of controls that give users the ability to make precise adjustments to their audio tracks. With a clear visual representation of frequency spectra, users can quickly identify problem areas in their mixes and address them with ease.

At its core, EQ MAGIX employs sophisticated filtering technologies that ensure high-quality sound processing. It offers various filter types, including parametric, low-pass, high-pass, band-pass, and notch filters. This extensive selection enables users to tailor their sound with remarkable accuracy. The parametric filter is particularly noteworthy, allowing for precise frequency adjustments, including bandwidth control, which is essential for making subtle tonal changes.

Another key characteristic of EQ MAGIX is its support for high-resolution audio. It operates at sample rates up to 192 kHz, ensuring that the clarity and detail of your sound are maintained throughout the mixing and mastering process. This high level of audio fidelity is crucial when working in both studio environments and live settings.

The plug-in also features a dynamic EQ mode, which provides users with the ability to adapt the equalization based on the input signal's dynamics. This dynamic processing capability enhances the overall sound quality and enables greater control over how specific frequencies react to varying levels of audio, making it an indispensable tool for achieving professional mixes.

Moreover, EQ MAGIX integrates well with various digital audio workstations (DAWs), allowing for seamless incorporation into existing workflows. Its compatibility with industry-standard platforms ensures that users can easily implement it into their projects without any technical hurdles.

In conclusion, Sound Performance Lab's EQ MAGIX stands out as a robust and versatile equalizer plug-in that caters to the needs of audio professionals. With its intuitive interface, high-quality filtering technologies, dynamic processing capabilities, and high-resolution audio support, EQ MAGIX is an essential tool for anyone looking to elevate their sound production. It epitomizes the merging of functionality and user experience, making it a valuable addition to any audio engineer's toolkit.