








Fosi Audio StepSense GS K7 DAC Headphone Amp
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Fosi Audio StepSense GS K7 DAC Headphone Amp
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
We offer free worldwide shipping, except for certain regions such as Ukraine and Russia, where our services are currently unavailable.
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Customer Support
WhatsApp: +8613716612254
support@fosiaudio.com
Mon-Fri: 3:00 AM - 3:00 PM PST -
FAQ’s
If you have any questions, please refer here: FAQs
Product details
• Immersive DAC Amplifier: Experience precise positional audio with the StepSense™ Gaming Sound Card. Hear every footstep and reload with crystal clarity, giving you a competitive edge in FPS games like Valorant, CS : GO, and Call of Duty.
• One-Click Smart Noise Suppression: Equipped with advanced DSP chips, the StepSense™ external sound card effectively eliminates background keyboard clicks and ambient noise, ensuring your voice is loud and clear during team comms or live streaming on Twitch/OBS.
• Wide Compatibility: The StepSense™ audio adapter features a standard USB interface, fully compatible with Windows 10/11, Mac OS, PS5, PS4, and Nintendo Switch (dock mode). No driver installation required—just plug and play.
• Real-time Voice Control & Effects: Built-in independent volume knob and mute button. Supports real-time monitoring and fun voice changer effects (Robot/Baby/Monster modes), making your gaming sessions more entertaining.
• Durable & Portable Design: Compact aluminum alloy shell for excellent heat dissipation and durability. The StepSense™ sound card is lightweight and portable, making it an essential accessory for gamers and content creators on the go.
FAQs
Please read our FAQs page to find out more.
How to: Choose the right banana plug?
- Closed Screw Type. All Fosi amplifiers use standard-sized speaker terminals (4mm pins).
- Easy to wire up and solidly connect to amplifier and passive speaker.
- If they do not fit, use a little force to tighten the plugs.
- Fosi Audio Banana Plugs (Copper, Silver/Gold Plated): http://bit.ly/40Djq0U, https://bit.ly/3MkPL8t
- Please watch tutorial videos: https://youtu.be/6pYhoqDlvNw / https://youtu.be/RGvBgGAwS9k
How to Diagnose Power Supply Failure?
- The following situations may cause this issue
- Case 1: The LED on the power supply does not light up; Case 2: Amp/Preamp does not turn on; Case 3: When plugged into the Amp, both light on the amp & power supply start blinking; Case 4: Amp/Preamp make noise; Case 5: Sound shuts off by itself
- Possible solution
- Check if the power supply is illuminated when plugged into AC by itself.
Plug power supply into a different socket.
Test the adapter with a meter.
Try a different power supply (within a range of DC input).
Test the included power supply on other electrical equipment.
Please watch the tutorial video by clicking on the link provided. https://youtu.be/yCjygS03zTE
What is a GaN?
- The GaN supply has a power output of 240W.
- Offers overload and over-temperature protection.
- The 48V 5A GaN power supply is also available on Amazon.

