Satri Circuit Laboratory VHA-5240B VR Headphone Amplifier

VHA-5240B is a headphone amplifier developed for VR goggles that can now easily enjoy 3D video.

By increasing the amount of auditory information in the world of virtual reality (VR) and increasing the accuracy, VR viewing can be more realistic. The VHA-5240B plays precisely, precisely, and precisely, the surround sound used, without any time deviation. A clear reproduction of the sense of direction and distance, such as flat phase characteristics that emphasize the localization of binaural recordings used in VR, adds a greater sense of reality to the virtual reality world.

Depending on the model of VR goggles, there are goggles with earphone output in stereo and goggles that come out in mono separately on the left and right, so in addition to stereo I/O to be able to correspond to each, there is a mono input/output of left and right. The VHA-5240B assumes no volume adjustment (gain controller) because it assumes a combination of goggles with volume adjustment. To prevent induction noise, we adopt a case using conductive carbon-mixed filament.

From the virtual world to the real world

The built-in amplifier in VR goggles loads the use of earphones. The higher the load, the greater the distortion, the worse the transient characteristics, and the worse the delay time. By precisely controlling the bias current, VHA-5240B maximizes the amount of information and increases the accuracy. Furthermore, by expanding the bandwidth to a no-return circuit without negative feedback, by eliminating transient distortion such as TIM distortion and minimizing time delay to the limit, phase distortion can be eliminated and surround localization can be accurately expressed. By connecting the VHA-5240B to the goggles' earphone output, it can reduce the load when using earphones and prevent deterioration of characteristics. By eliminating the gain controller, the VHA-5240B increases the input impedance by 100 times than the VHA-5240A. Therefore, we can expect further improvements in accuracy than 5240A and an increase in the amount of information. It takes out a pure signal without deterioration of characteristics and drives the earphone with a precise driver circuit. This makes it possible to accurately reproduce the required phase and time information in VR and realistically reproduce the world view of virtual reality.

* The product does not include accessories such as cables. Please prepare your own power supply and cable.