{"type":"firestarter.listing","listing":{"id":"lst_z2bJ_qCP","product_name":"Softears RSV","category":"In-Ear Monitors","description":"\n\nBuilding on Flagship Heritage\nBuilding on the success of the flagship RS10, Softears reimagined key design concepts. While the RS10 remains a benchmark in-ear monitor, its complex crossover made it difficult to drive. The RSV (Reference Sound Five) was developed as an innovative BA IEM with a far easier-to-drive nature.\n\n\nA Year and a Half of Research\nAfter a year and a half of research, Softears presents the RSV, a 5-driver BA design that achieves reference-grade performance with outstanding efficiency. Its new driver configuration and crossover allow the RSV to deliver satisfying dynamics even from conventional mobile phones.\n\n\n\nModern Reference with Dynamic Presence\nThe RSV stands apart in the Reference Sound lineup not only for its easy drivability, but also for its ability to reproduce the dynamics and presence demanded by modern recordings.\n\n\nHandcrafted Satin Carbon &amp; Gold Foil Design\nEvery faceplate is handcrafted using satin carbon fiber fragments and gold foil, blending cutting-edge material with antique elegance. This artisan process makes each RSV unique—an individual piece of craftsmanship rather than just an earphone.\n\n\nAcoustic Engineering Excellence\nRSV integrates advanced acoustical filters with a carefully designed crossover, enabling BA drivers to deliver extraordinary dynamics, near-perfect frequency response, and highly consistent phase. This efficient architecture transforms a simple 5-driver setup into a remarkably precise system.\n\n\n\nPrecision Crossover and Filters\nThe crossover employs a 3rd-order LRC filter for bass, an impedance plus low-pass system for mids, and a film capacitor for highs, totaling six components to properly divide the signal across five drivers. With precise 3D printing, Softears crafted acoustic filters accurate to 0.1 mm, fine-tuned with dampers for ideal sound.\n\n\nNatural and Immersive Tuning\nTuned using HRTF measurements from high-end speakers and reverberation analysis, the RSV delivers textured bass, natural ti","images":["https://cdn.shopify.com/s/files/1/0040/7201/3924/files/11_1661cc23-7010-4f5b-8a1c-f411bc57d18c.png?v=1755681684","https://cdn.shopify.com/s/files/1/0040/7201/3924/files/55_227f8e49-ea6b-4b07-a866-1f74b20b8402.png?v=1755681684"],"price":729.99,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:44.738Z"},"share_url":"https://firestarter.network/l/lst_z2bJ_qCP","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_z2bJ_qCP' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Softears RSV' and a budget_max comfortably above $729.99 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."]}}