# AUDIOCITY — Gaming Headsets, HiFi DAC & Amp, Audiophile Cables Store > > AUDIOCITY is an international audio store selling gaming headsets (G-Turbo, H-Turbo series), HiFi portable DAC/amps (KSHF-01/02/02 Pro), and premium wires & cables (OTG silver, 24G-5N upgrade cables). Free worldwide shipping, secure checkout, 30-day returns. Fully localized into 9 languages (EN/RU/ES/FR/DE/PT/JA/KR/ZH). 22 products with multilingual descriptions and reviews, plus a 30-article audio blog. # llms.txt conventions This site publishes an llms.txt index (llmstxt.org v2) for LLMs and crawlers. - Internal links are relative and resolve to this origin. - Dynamic sections (Products, Information pages, Articles) are generated automatically from live content. - Product and blog pages are localized into 9 languages; canonical URLs are language-suffixed (/en, /ru, ...). - Store scope: 22 products across categories (Decoders/DACs, Wired headset accessories, Headphone-related, Wire/Cable-related). - Shopping: Google Shopping product feed maintained; coupons and time-limited campaigns supported. - AI/MCP integration: account-scoped tools cover products, orders, categories, campaigns, reviews, CMS pages, and analytics. Priority rules: prefer canonical product pages over category listing pages; keep URLs stable; do not crawl auth or session pages. ## Products - [All products](https://keysion.shop/products): Complete catalog with category filtering and product listings - [Decoder](https://keysion.shop/products/decoder): Decoder product listing - [High-Performance Decoder](https://keysion.shop/products/decoder/high-performance-decoder): High-Performance Decoder product listing (subcategory of Decoder) - [Portable Headphone Amplifier](https://keysion.shop/products/decoder/portable-headphone-amplifier): Portable Headphone Amplifier product listing (subcategory of Decoder) - [AUX Decoder](https://keysion.shop/products/decoder/aux-decoder): AUX Decoder product listing (subcategory of Decoder) - [Headphone Related](https://keysion.shop/products/headphone-related): Headphone Related product listing - [Wired Earphones](https://keysion.shop/products/headphone-related/wired-earphones): Wired Earphones product listing (subcategory of Headphone Related) - [Earplugs](https://keysion.shop/products/headphone-related/earplugs): Earplugs product listing (subcategory of Headphone Related) - [Cable Related](https://keysion.shop/products/cable-related): Cable Related product listing - [Headphone Upgrade Cable](https://keysion.shop/products/cable-related/headphone-upgrade-cable): Headphone Upgrade Cable product listing (subcategory of Cable Related) - [OTG Cable](https://keysion.shop/products/cable-related/otg-cable): OTG Cable product listing (subcategory of Cable Related) - [Adapter](https://keysion.shop/products/adapter): Adapter product listing - [HiFi Adapter](https://keysion.shop/products/adapter/hifi-adapter): HiFi Adapter product listing (subcategory of Adapter) - [Storage Bag](https://keysion.shop/products/storage-bag): Storage Bag product listing - [Magnetic Storage Bag](https://keysion.shop/products/storage-bag/magnetic-storage-bag): Magnetic Storage Bag product listing (subcategory of Storage Bag) - [Ordinary Storage Bag](https://keysion.shop/products/storage-bag/ordinary-storage-bag): Ordinary Storage Bag product listing (subcategory of Storage Bag) - Product detail pages: https://keysion.shop/product/{slug} — one page per product (full list in the sitemap) ## Information pages - [Privacy Policy](https://keysion.shop/pages/privacy) - [Contact Us](https://keysion.shop/pages/contact) - [Terms of Service](https://keysion.shop/pages/terms) - [Brand Story](https://keysion.shop/pages/story) - [FAQ](https://keysion.shop/pages/faq) - [Delivery Information](https://keysion.shop/pages/shipping) - [Warranty Terms](https://keysion.shop/pages/warranty) - [Return Policy](https://keysion.shop/pages/returns) ## Articles - [FLAC, ALAC, WAV, AIFF: What Actually Differs? How the Four Lossless Formats Work, and How to Pick (Tested on KEYSION 02)](https://keysion.shop/blog/lossless-format-comparison): Buying guide / tutorial article - [What Is MQA? The Fold-and-Unfold Trick, the Controversy, and Whether It's Worth Enabling (Tested on KEYSION 02 Pro)](https://keysion.shop/blog/mqa-audio-explained): Buying guide / tutorial article - [What Are Asynchronous USB and Jitter? Does Clock Jitter Really Affect Sound Quality (KEYSION 02 Pro Test)](https://keysion.shop/blog/usb-jitter-async-dac-guide): Buying guide / tutorial article - [Do Eartip Materials Change the Sound? Silicone, Foam, and Hybrid Tips Compared (KEYSION 30A Test)](https://keysion.shop/blog/eartip-material-sound-guide): Buying guide / tutorial article - [What Is Soundstage and Imaging? How Headphones Create a Sense of Space](https://keysion.shop/blog/soundstage-imaging-guide): Buying guide / tutorial article - [Open-Back vs Closed-Back Headphones: Which Design Fits Your Listening Style](https://keysion.shop/blog/open-vs-closed-back-headphones): Buying guide / tutorial article - [How to Calculate Headphone Amp Power: How Many Milliwatts Does Your Headphone Need (KEYSION 02 Pro and 02 Measured)](https://keysion.shop/blog/amp-power-matching-guide): Buying guide / tutorial article - [Do DAC Digital Filter Settings Actually Change the Sound? Linear Phase vs Minimum Phase (KEYSION 02 Pro Tested)](https://keysion.shop/blog/dac-digital-filter-settings-guide): Buying guide / tutorial article - [Dongle DAC Sounds Weak or Keeps Cutting Out? Does the OTG Cable Matter and When to Upgrade (Tested on 01)](https://keysion.shop/blog/otg-cable-quality-dongle-guide): Buying guide / tutorial article - [Bluetooth Headphones Won’t Pair or Keep Dropping? A Step-by-Step Check and What Usually Causes It (Tested on X1)](https://keysion.shop/blog/bluetooth-pairing-connection-guide): Buying guide / tutorial article - [Does EQ tuning on your phone actually work? How to shape your sound without making it muddy (tested on KEYSION 01)](https://keysion.shop/blog/headphone-eq-guide): Buying guide / tutorial article - [Where does Bluetooth audio quality get lost? How much do SBC, AAC, aptX, and LDAC really differ (KEYSION S2 measured)](https://keysion.shop/blog/bluetooth-codec-quality-guide): Buying guide / tutorial article - [What’s the real difference between DSD and PCM? Is DSD256 worth changing your source for? The trade-offs we measured with KEYSION 02](https://keysion.shop/blog/dsd-vs-pcm-guide): Buying guide / tutorial article - [Do Higher SNR, Dynamic Range, and Distortion Numbers Really Sound Better? What KEYSION 02 Pro’s Measured Data Means Versus What You Actually Hear](https://keysion.shop/blog/specs-snr-thd-audio-guide): Buying guide / tutorial article - [Where can I find lossless music? Hi-Res download sources and format conversion (getting source files for KEYSION 02 Pro)](https://keysion.shop/blog/hires-music-sources-guide): Buying guide / tutorial article - [Dongle DAC won’t connect to your phone or gives no sound? An OTG compatibility troubleshooting checklist (KEYSION S1/S2 used as the example)](https://keysion.shop/blog/usb-otg-compatibility-troubleshooting): Buying guide / tutorial article - [Why Does a Headphone Cable Pick Up Noise? How Much Shielding and Crosstalk Actually Matter (Tested with KEYSION 24G)](https://keysion.shop/blog/cable-shielding-crosstalk-guide): Buying guide / tutorial article - [Does a Bad Eartip Fit Kill the Bass? How Seal and Fit Shape IEM Sound (Tested with KEYSION 30A Foam Tips)](https://keysion.shop/blog/iem-fit-seal-sound-guide): Buying guide / tutorial article - [Class A, AB and D Headphone Amps: How Does the Output Stage Shape the Sound? (Measured on the KEYSION 02 Pro and 02)](https://keysion.shop/blog/amp-output-class-ab-d-guide): Buying guide / tutorial article - [Dongle DAC or Bluetooth Amp? Which Portable HiFi Setup Should You Pick? (KEYSION 02 Pro vs S2, Measured)](https://keysion.shop/blog/dongle-dac-vs-bluetooth-amp-guide): Buying guide / tutorial article - [Digital vs Analog Volume: Does Turning Down the Volume Actually Lose Sound Quality? Measured on the KEYSION 02 Pro](https://keysion.shop/blog/digital-vs-analog-volume-guide): Buying guide / tutorial article - [How to Read a Headphone Frequency Response: Target Curves, Tuning Taste, and What the KEYSION 02 Pro Actually Measures](https://keysion.shop/blog/frequency-response-target-curve-guide): Buying guide / tutorial article - [Does Buying an ANC Headset Actually Make the Office Quiet? Active Noise Cancelling vs Passive Isolation, Checked With KEYSION 30A Tips and X1](https://keysion.shop/blog/noise-cancelling-vs-isolation-guide): Buying guide / tutorial article - [Why Do Bluetooth Headphones Lag in Games? Where Latency Comes From and How to Cut It, Tested With the G-Turbo X1](https://keysion.shop/blog/bluetooth-latency-gaming-guide): Buying guide / tutorial article - [Do More Drivers Mean Better Sound? The Truth About Multi-Driver IEMs and Crossovers, Tested With KEYSION Memory-Foam Tips](https://keysion.shop/blog/multi-driver-iem-crossover-guide): Buying guide / tutorial article - [Is a Lossless Streaming Subscription Worth It? Quality Tiers and the Real Difference, Tested With the KEYSION 02 Pro](https://keysion.shop/blog/music-streaming-quality-tiers-guide): Buying guide / tutorial article - [Why Do Dongle DACs Get Hot and Drain Battery? Where Phone Power Comes From, Explained with the KEYSION 01](https://keysion.shop/blog/dongle-dac-battery-heat-guide): Buying guide / tutorial article - [Does a 4.4mm Jack Always Mean True Balanced? Spotting Real vs. Fake Balanced with the KEYSION 02 Pro and Upgrade Cable](https://keysion.shop/blog/true-vs-fake-balanced-guide): Buying guide / tutorial article - [Portable or Desktop: When Is It Worth Upgrading to Desktop HIFI? A Look at the KEYSION 02 Pro](https://keysion.shop/blog/portable-vs-desktop-hifi-guide): Buying guide / tutorial article - [Is the Hi-Res Badge Actually Worth It? How High Is the Bar, and Does Passing It Guarantee Better Sound? A Closer Look With the KEYSION 02 Pro](https://keysion.shop/blog/hires-certification-guide): Buying guide / tutorial article - [Do Headphone Cables Really Change the Sound? Copper vs Silver vs Silver-Plated, Science and Hype, Tested on KEYSION Cables](https://keysion.shop/blog/cable-sound-science-guide): Buying guide / tutorial article - [How Loud Is Too Loud? Sound Pressure, WHO Limits and Hearing Protection, Explained With a KEYSION 02 Pro](https://keysion.shop/blog/safe-listening-volume-guide): Buying guide / tutorial article - [Is R2R actually more natural than Delta-Sigma? What the two DAC architectures really argue about](https://keysion.shop/blog/r2r-vs-delta-sigma-dac-guide): Buying guide / tutorial article - [Hissing and noise in your headphones: is the gear broken, or just not set up right? A KEYSION 02 Pro troubleshooting walkthrough](https://keysion.shop/blog/headphone-noise-hiss-guide): Buying guide / tutorial article - [Is Balanced Always Better? Single-Ended vs Balanced, When the 4.4mm Output Really Wins](https://keysion.shop/blog/single-ended-vs-balanced-guide): Buying guide / tutorial article - [Why Does the Same IEM Sound Different on Another Device? Output Impedance and Damping, Explained](https://keysion.shop/blog/output-impedance-damping-guide): Buying guide / tutorial article - [What Do 44.1, 48, 96, and 192kHz Sample Rates Really Do? Can You Actually Hear the Difference?](https://keysion.shop/blog/sample-rate-resampling-guide): Buying guide / tutorial article - [Is headphone burn-in real, or just in your head? Mechanical aging, ear adaptation, or psychology](https://keysion.shop/blog/headphone-burn-in-myth-guide): Buying guide / tutorial article - [High vs Low Gain on a Headphone Amp: When to Flip the Switch](https://keysion.shop/blog/headphone-amp-gain-guide): Buying guide / tutorial article - [Dynamic, Balanced Armature, Planar, Electrostatic: Which Headphone Driver Is Right for You?](https://keysion.shop/blog/headphone-driver-types-guide): Buying guide / tutorial article - [FLAC, DSD and Bluetooth Codecs: What Actually Changes What You Hear](https://keysion.shop/blog/lossless-audio-bluetooth-codecs-guide): Buying guide / tutorial article - [How Much Power Do Your Headphones Really Need? Impedance and Sensitivity, Calculated](https://keysion.shop/blog/headphone-power-impedance-sensitivity-guide): Buying guide / tutorial article - [KEYSION EQ Tuning Guide: App and Web Console with 59 Presets and Custom EQ](https://keysion.shop/blog/keysion-eq-app-web-guide): Buying guide / tutorial article - [KEYSION DAC Chips Explained: What CS43198, SGM8262 and CB5100 Actually Do](https://keysion.shop/blog/keysion-dac-chips-explained): Buying guide / tutorial article - [Complete Guide to Connecting Android Phones to DACs: OTG, USB Exclusive, Power and Disconnection Troubleshooting](https://keysion.shop/blog/android-usb-otg-dac-guide): Buying guide / tutorial article - [3.5mm vs 4.4mm vs 2.5mm Plugs: Single-Ended and Balanced, Finally Clear](https://keysion.shop/blog/3-5mm-4-4mm-2-5mm-plug-guide): Buying guide / tutorial article - [4N, 5N, 6N OFC and Litz Structure: The Real Meaning and Reasonable Expectations of Cable Parameters](https://keysion.shop/blog/copper-purity-litz-explained): Buying guide / tutorial article - [IEM Upgrade Cable Buying Guide: Connectors, Plugs, Strands, Solder - Four Steps to Choose Right Without Pitfalls](https://keysion.shop/blog/iem-upgrade-cable-buying-guide): Buying guide / tutorial article - [Comprehensive Guide to Dongle DAC Specs: SNR, Distortion, Noise Floor, Power Output - What's Behind the Numbers](https://keysion.shop/blog/dongle-dac-specs-explained): Buying guide / tutorial article - [Which KEYSION Portable DAC? 01 vs 02 vs 02 Pro Compared, With Buying Advice](https://keysion.shop/blog/choose-portable-dac-01-02-02pro): Buying guide / tutorial article ## Optional - [Sitemap](https://keysion.shop/sitemap.xml): Machine-readable index of all public URLs (products, categories, information pages, 9-language hreflang alternates) - [robots.txt](https://keysion.shop/robots.txt): Crawling rules (private/account pages are disallowed)