{"product_id":"pass-labs-hpa-1c-headphone-amplifier","title":"Pass Labs HPA-1c Headphone Amplifier","description":"\u003cp\u003eThe Pass Labs HPA-1c is a refined evolution of the award-winning HPA-1 headphone amplifier, preserving the original discrete Class A circuit while introducing meaningful upgrades to its power supply and grounding topology. These revisions yield a lower noise floor, tighter regulation, and a quieter background that reveals greater low-level detail and clarity, particularly with high-sensitivity headphones where the roughly 10 dB improvement in overall noise performance is most audible.\u003c\/p\u003e\u003cp\u003eBeyond its primary role as a headphone amplifier, the HPA-1c functions as a high-performance line-level preamplifier with a robust output stage capable of driving typical power amplifier loads. The headphone output delivers up to 2 watts into 32 ohms with an output impedance below 2 ohms, providing ample authority for most dynamic and planar magnetic designs, while the preamplifier section maintains very low output impedance for seamless integration into a reference speaker system.\u003c\/p\u003e\n\u003ctable class=\"pu-table\" style=\"width:100%;border-collapse:separate;border-spacing:0;border:0;box-shadow:none;outline:none;background:none;table-layout:fixed;margin:0\"\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd style=\"border:0;padding:0\"\u003e\n\u003ch3 style=\"margin:1.25em 0 0.5em\"\u003e\n\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.75\" stroke-linecap=\"round\" stroke-linejoin=\"round\" style=\"display:inline-block;width:1.1em;height:1.1em;vertical-align:-0.18em;margin-right:0.45em\" aria-hidden=\"true\"\u003e\u003cpath d=\"M4 17v2a2 2 0 0 0 2 2h12a2 2 0 0 0 2 -2v-2\"\u003e\u003c\/path\u003e\u003cpath d=\"M7 11l5 5l5 -5\"\u003e\u003c\/path\u003e\u003cpath d=\"M12 4l0 12\"\u003e\u003c\/path\u003e\u003c\/svg\u003eDownloads\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli style=\"margin:0 0 0.35em\"\u003e\u003ca href=\"https:\/\/www.passlabs.com\/wp-content\/uploads\/2020\/12\/HPA-1_om.pdf\" target=\"_blank\" rel=\"noopener nofollow\"\u003eHPA-1 Owner's Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:0 0 0.35em\"\u003e\u003ca href=\"https:\/\/www.passlabs.com\/wp-content\/uploads\/2019\/12\/HPA-1-Sheet1.pdf\" target=\"_blank\" rel=\"noopener nofollow\"\u003eCAD File\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:0 0 0.35em\"\u003e\u003ca href=\"https:\/\/www.passlabs.com\/wp-content\/uploads\/2020\/05\/brochure-pass-labs-2020-website.pdf\" target=\"_blank\" rel=\"noopener nofollow\"\u003ePass Labs Brochure 2020\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Pass Labs","offers":[{"title":"Default Title","offer_id":43181640122466,"sku":null,"price":4045.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2475\/2780\/files\/pass-labs-hpa-1c-headphone-amplifier-1.jpg?v=1786008334","url":"https:\/\/pearlaudio.com\/products\/pass-labs-hpa-1c-headphone-amplifier","provider":"Pearl Audio","version":"1.0","type":"link"}