{"type":"firestarter.listing","listing":{"id":"lst_yfSFmDWX","product_name":"xDuoo XD-05 BAL Balanced DAC/Amp","category":"Headphone DAC/Amp","description":"The XD-05 line strikes a balance\nA few years ago, xDuoo released the XD-05, a portable DAC/amp with HiFi clout for an entry-level price. Since then, they’ve introduced “Plus” and “Basic” models with varied capabilities. Now they’re back with the BAL model, the most feature-packed of the lineup yet. \nThe BAL model includes premium features like dual ESS SABRE DAC chips, balanced output, digital filters, and Bluetooth 5.0. It’s a great option for traveling, especially to conferences or hotel rooms where desk space is available but traveling with a full-sized DAC/amp would be inconvenient or impossible. \nTwo ESS ES9038Q2M SABRE DAC chips\nThe ESS9038Q2M uses the 32-bit HyperStream DAC architecture and Time Domain Jitter Eliminator, delivering a DNR of up to 128dB and THD+N of up to 0.0009%. \nGain and boost settings\nGain and boost settings accommodate the impedances of different headphones. The boost  switch increases the supply voltage of the op amp from ±8V to ±13V, while the gain switch adds ±6 to ±15dB of output volume. \n8 Digital filters\nA common complaint among analog lovers is that digital sounds cold, overly-analytical, or even inhuman. They couldn’t be further from the truth, especially with the advent of digital filters. Digital filters affect parameters such as phase, latency, and transition band roll-off, tailoring the listening experience in subtle and not-so-subtle ways. A slow roll-off filter eliminates sounds above a certain frequency, resulting in a mellower, velvety sound. \nBluetooth 5.1\nQualcomm’s QCC5125 Bluetooth 5.1 chip decodes all of the major Bluetooth formats, including AAC, SBC, aptX, aptX LL, aptX HD, and LDAC. By streaming from your phone, you can keep the XD-05 BAL in your pocket while using your phone to wirelessly change tracks and  adjust volume. \nUp to 24 hours of battery\nThe XD-05 BAL’s battery lasts between 9 and 24 hours, depending on the input in use. USB decoding lasts 9 hours, SPDIF lasts 15, and Aux lasts a whopping 24 hours. 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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_yfSFmDWX' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy xDuoo XD-05 BAL Balanced DAC/Amp' and a budget_max comfortably above $429.00 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."]}}