Satri Circuit Laboratory VHA-5240B Headphone Amplifier for VR

The VHA-5240B is a headphone amplifier developed for VR goggles, which can now easily enjoy 3D images.

By increasing the amount of auditory information in the VR (Virtual Reality) world and improving the accuracy, VR viewing can become more realistic. The VHA-5240B reproduces the surround sound used accurately, precisely, and without time deviation. The sense of direction and distance are clearly reproduced, such as the flat phase characteristics that emphasize the localization of binaural recordings used in VR, adding a further sense of reality to the virtual reality world.

Depending on the model of VR goggles, there are goggles with stereo earphone output and goggles with mono output on the left and right separately, so in addition to stereo input and output, there are separate mono inputs and outputs on the left and right so that they can be used for each. The VHA-5240B does not have a volume adjustment (gain controller) because it is assumed to be combined with goggles with volume adjustment. The case is made of conductive carbon-laced filament to prevent induced noise.

From the virtual world to the real world

The amplifier built into the VR goggles is a burden to use the earbuds. The heavier the load, the more adverse effects are caused, such as increased distortion, worsening transient characteristics, and worsening delay times. The VHA-5240B maximizes the amount of information and improves accuracy by precisely controlling the bias current. Furthermore, by expanding the bandwidth to create a non-feedback circuit that does not apply negative feedback, it is possible to eliminate transient distortion such as TIM distortion and minimize time delay, thereby eliminating phase distortion and accurately expressing surround localization. By connecting the VHA-5240B to the earbud output of the goggles, you can reduce the load when using the earbuds and prevent deterioration of characteristics. By omitting the gain controller, the VHA-5240B has an input impedance that is 100 times higher than that of the VHA-5240A. For this reason, it is expected to further improve accuracy and increase the amount of information compared to the 5240A. It extracts a pure signal with no deterioration of characteristics and drives the earbuds with a precise driver circuit. This makes it possible to precisely reproduce the phase and time information required in VR, and to realistically reproduce the world view of virtual reality.

*The product does not come with cables or other accessories. Please prepare your own power supply and cables.