{"type":"firestarter.listing","listing":{"id":"lst_-lDgUsoS","product_name":"Effect Audio CODE 23 MK II / MK 2 Earphone Cables","category":null,"description":"CODE 23 MK II is the Horizon Series statement of Copper in its purest form. Built entirely from UP-OCC Pure Copper Litz, it preserves the conductor’s natural character without compromise—delivering weight, density, and a low-end foundation that is both powerful and solid.The MK II evolution introduces three precise improvements: over 20% more conductive material for stronger signal delivery and dynamic headroom, a 10% reduction in overall diameter for improved ergonomics, and the Quad-FlexPro™ Solid Core system, which enhances frequency control and stability across the spectrum. Together, these refinements push performance further while retaining structural integrity.CODE 23 MK II stands as the definitive expression of copper—focused, authoritative, and unmatched in its ability to project music with scale and presence.\n \nSound Profile:-\nCODE 23 MK II delivers immense bass power, bold dynamics, and physical presence. A sound that hits with subwoofer-like impact while retaining balance and control. The low end is deep and commanding, anchoring the music with scale and authority.The result is EFFECT AUDIO's most powerful expression of copper in the Horizon Series, crafted for the purest Copper fans.\n\n\nWhat is Improved in MK II:-\n\n1. 20% More Conductive MaterialBy increasing the strand count by 20%, CODE 23 MK II expands its conductive surface area , improving current uniformity and minimizing micro-resistance across the bundle. This refined geometry enhances transient accuracy and current delivery, translating engineering precision into audible control. Expect stronger yet tighter bass definition, cleaner high-frequency extension, and an effortless sense of dynamic coherence. The natural outcome of copper optimized to its physical limits.2. 10% Reduction in DiameterDespite the material increase, the cable is now slimmer thanks to the sleeve optimization. It keeps the same AWG size while improving overall flexibility and reducing bulk.3. Quad-FlexPro™ Solid Core SystemA","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/files/effect-audio-code-23-mk-ii-mk-2-earphone-cables-effect-audio-970640.jpg?v=1760449869","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/effect-audio-code-23-mk-ii-mk-2-earphone-cables-effect-audio-190987.jpg?v=1760449866","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/effect-audio-code-23-mk-ii-mk-2-earphone-cables-effect-audio-980475.jpg?v=1760449864"],"price":629.99,"currency":"USD","in_stock":true,"inventory_qty":19998,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:28.709Z"},"share_url":"https://firestarter.network/l/lst_-lDgUsoS","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_-lDgUsoS' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Effect Audio CODE 23 MK II / MK 2 Earphone Cables' and a budget_max comfortably above $629.99 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}