{"type":"firestarter.listing","listing":{"id":"lst_FE0gUU8K","product_name":"Pre Order QULOOS MUB5 R2R Portable DAC & Headphone Amplifier","category":"DAC / AMP","description":"Features:-\n\n>High-End Portable DAC/AMP.\n\n>19+5 Segmented R2R DAC Architecture.\n\n>Precisely matched Resistors Array with 0.01% Tolerance.\n\n>Custom Oversampling(OS) and Non-Oversampling(NOS/M1) Modes.\n\n>Discrete Headphone Amplifier Section with FZT Power Transistors.\n\n>OPA627 Buffer Stage.\n\n>Up to 2.5W Per Channel Output.\n\n>Versatile Functionality With Multiple Input Options(Coaxial, Optical, Bluetooth, and USB Type-C).\n\n>3.5mm+4.4mm Headphone Outputs.\n\n>Line-Out Function Support.\n\n>120-Level Precise Volume Adjustment.\n\n>Touch-Sensitive Display Panel, Physical Volume Knob.\n\n>Professionally Designed Shielded Power Supply.\n\n>Up to 8 Hours Battery Backup.\n\n>QC Fast Charging Support.\n\n>MicroSD Card Slot.\n\n>DC-IN With Battery Bypass Technology.\n\nQULOOS MUB5 is a reference-grade portable DAC and Headphone Amplifier designed with a segmented R2R ladder DAC architecture. Quloos has professionally designed a high-precision 19+5 segmented R2R DAC architecture. They have matched resistors with 0.01% tolerance. The MUB5 has a total of 178 resistors that form this full R2R network array and provide high-resolution audio signal processing. It’s designed to bring life to your music with its ultra-clean and rich R2R DAC arrangement, a high-power discrete amplification section, and a clean, NDCS shielded power supply with 20 independent power circuits, LTC6655 voltage reference, and QA661 low-jitter crystal oscillators. Upgrade your portable arsenal with the all-new Quloos MUB5 and unlock pure high-fidelity sonic excellence for yourself!!\n\nPure R2R DAC Architecture:-\n\nQULOOS MUB5 features a 19+5 segmented R2R DAC arrangement. It features 178 precision-matched resistors, which are matched with 0.01% tolerance. This R2R DAC arrangement provides crisp, high-resolution audio signal processing and delivers a rich, musical sound profile with high accuracy and pure high-resolution audio excellence.\n\nCustomize Your Sound With Two Filter Optio","images":["https://cdn.shopify.com/s/files/1/0031/0453/8673/files/quloos-mub5-r2r-portable-dac-headphone-amplifier-quloos-989528.webp?v=1758006339","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/quloos-mub5-r2r-portable-dac-headphone-amplifier-quloos-940904.webp?v=1758006354","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/quloos-mub5-r2r-portable-dac-headphone-amplifier-quloos-mub5-r2r-ti-gold-598748.webp?v=1758006322","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/quloos-mub5-r2r-portable-dac-headphone-amplifier-quloos-mub5-r2r-titanium-549314.webp?v=1758006331","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/quloos-mub5-r2r-portable-dac-headphone-amplifier-quloos-670667.webp?v=1758006334","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/quloos-mub5-r2r-portable-dac-headphone-amplifier-quloos-695744.webp?v=1758006360","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/pre-order-quloos-mub5-r2r-portable-dac-headphone-amplifier-dac-amp-quloos-mub5-r2r-green-case-510454.jpg?v=1769157113","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/pre-order-quloos-mub5-r2r-portable-dac-headphone-amplifier-dac-amp-quloos-mub5-r2r-yellow-case-846924.jpg?v=1769157111","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/pre-order-quloos-mub5-r2r-portable-dac-headphone-amplifier-dac-amp-quloos-mub5-r2r-blue-case-433521.jpg?v=1769157123","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/pre-order-quloos-mub5-r2r-portable-dac-headphone-amplifier-dac-amp-quloos-mub5-r2r-pink-case-225992.jpg?v=1769157126","https://cdn.shopify.com/s/files/1/0031/0453/8673/files/pre-order-quloos-mub5-r2r-portable-dac-headphone-amplifier-dac-amp-quloos-mub5-r2r-black-case-940377.jpg?v=1769157137"],"price":1300,"currency":"USD","in_stock":true,"inventory_qty":69993,"dynamic_pricing":false,"listed_at":"2026-06-20T16:26:28.741Z"},"share_url":"https://firestarter.network/l/lst_FE0gUU8K","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 ","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_FE0gUU8K' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Pre Order QULOOS MUB5 R2R Portable DAC & Headphone Amplifier' and a budget_max comfortably above $1300.00 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."]}}