Satri Circuit Laboratory VHA-5240B Headphone Amplifier for VR

The VHA-5240B is a headphone amplifier developed for VR goggles, which now allow easy enjoyment of 3D videos.

By increasing the amount of auditory information and improving accuracy in the world of VR (Virtual Reality), VR viewing can feel more realistic. The VHA-5240B precisely reproduces surround sound with accuracy and without timing delays. It emphasizes the localization of binaural recordings used in VR, with flat phase characteristics, making direction and distance clearly perceptible, thereby adding a greater sense of realism to the virtual world.

Depending on the VR goggle model, some output stereo sound while others output separate mono channels for left and right. To accommodate both types, the VHA-5240B is equipped with both stereo input/output and separate mono input/output for left and right channels. The VHA-5240B assumes usage with goggles that have their own volume control, so it does not have a volume adjustment (gain controller). To prevent induced noise, the case uses carbon-infused conductive filament.

From the virtual world to the real world

The amplifier built into VR goggles can be a burden when using earphones. The heavier the load, the more it negatively affects the sound, causing increased distortion, deterioration of transient response, and longer delay times. The VHA-5240B maximizes information content and improves accuracy by precisely controlling the bias current. Additionally, by widening the bandwidth and using a non-feedback circuit without negative feedback, it eliminates transient distortions such as TIM distortion and reduces time delay to the extreme, removing phase distortion and accurately reproducing surround positioning. By connecting the VHA-5240B to the earphone output of the goggles, it reduces the load when using earphones and prevents deterioration in performance. By omitting the gain controller, the VHA-5240B increases the input impedance 100 times higher than the VHA-5240A. This allows for further improvement in accuracy and an increase in information. It extracts a pure signal without performance degradation and drives earphones with a precise driver circuit. This enables the VR phase and timing information to be reproduced meticulously, making the virtual reality experience feel truly realistic.

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

Ultimate positioning and spatial reproduction for VR use

• "The sound image positioning is astonishingly sharp and accurate. The sense of immersion in VR space has dramatically increased."
  The high-speed response and excellent phase characteristics of the SATRI circuit make the location of sound sources feel so precise that they seem to be 'actually there.' In VR, audio position information is directly linked to immersion, and in this regard, this amplifier is exceptional. In both games and videos, the sense of space and distance is delivered realistically, greatly enhancing the sense of presence.
  
• "The soundstage is rendered in a three-dimensional and vast manner, deepening the sense of reality in the virtual space even further."
  It creates a sense of depth and dimensionality far beyond that of a conventional headphone amplifier, enhancing the scale of the VR environment itself. The expansion of the background and the sense of air feel natural, giving the virtual space a stronger impression of 'presence.'
  

Speed and resolution with the SATRI circuit

• "The attack of the sound is extremely fast, giving sound effects a lifelike vitality."
  The current-transmission SATRI circuit is characterized by an exceptionally fast transient response. There is no delay or muddiness in the sound, and the sharpness of sound effects and the energy of music hit your ears directly. Especially in action-based VR, this agility significantly boosts the sense of immersion.
  
• "The noise floor is extremely low, allowing even the finest details to be heard clearly."
  The background silence is deep, and environmental sounds and very subtle sound effects are reproduced clearly. Footstep positions, faint rustling of clothing, and distant environmental sounds are all sharply portrayed, strengthening the unique VR sensation of "being inside the space."
  

Evaluation for normal listening

• "Even in music playback, it demonstrates ultimate transparency and resolution."
  The precision that stands out in VR applications also proves effective for music listening. With a neutral, uncolored character, it brings out the full range of information from the sound source, allowing you to purely enjoy the quality of the sound. The SATRI's characteristic speed and clarity vividly render music.