{"product_id":"fosi-audio-ph04-4-channel-headphone-amplifier-ultra-compact-studio-stage","title":"Fosi Audio PH04 4-Channel Headphone Amplifier | Ultra-Compact Studio \u0026 Stage","description":"\u003csection\u003e\n  \u003ch2\u003eOverview\u003c\/h2\u003e\n  \u003cp\u003eMeet the Fosi Audio PH04, a four-channel headphone amplifier designed for compact studios and on‑stage monitoring. Each channel includes its own level control, allowing you to tailor the listening mix for up to four listeners without altering the main mix.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat makes it stand out\u003c\/h2\u003e\n  \u003cp\u003eEngineered for clarity, the PH04 uses independent stereo amplifier sections that preserve detail even at higher listening levels. The upgraded design adds a convenient power switch and a dedicated 3.5 mm output for quick connections across a variety of headphones. For group monitoring in a busy session, this unit provides a practical, money-saving option without compromising sound fidelity.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eFour independent stereo amplifier sections maintain sonic detail even at higher levels\u003c\/li\u003e\n    \u003cli\u003eUltra-low-noise op-amps support clean, faithful monitoring across headphones\u003c\/li\u003e\n    \u003cli\u003eDedicated output level controls per channel enable personalized listening\u003c\/li\u003e\n    \u003cli\u003eCompatibility with 3.5 mm and 6.35 mm headphones via adapter for flexible setups\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eCompact, flexible, ready to travel\u003c\/h2\u003e\n  \u003cp\u003eWith its ultra-compact footprint, the PH04 fits on crowded desks and portable setups alike. It powers four headphones simultaneously, freeing you from sharing a single cue and reducing setup time for practices, sessions, or live rehearsals.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eIncluded and how to use\u003c\/h2\u003e\n  \u003cp\u003eWhat you get: the PH04 amplifier, a 12V DC power adapter, and a user manual. Plug in the power supply, connect your headphones, and adjust each channel to taste. The design supports quick rearrangements for evolving recording or rehearsal needs.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTarget scenarios\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eSmall studios tracking multiple performers with individual listening levels\u003c\/li\u003e\n    \u003cli\u003eRehearsal rooms where each musician monitors the main mix separately\u003c\/li\u003e\n    \u003cli\u003eEducational settings or client sessions that require clear, independent listening\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the PH04 best used for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It powers up to four headphones with independent volume control, ideal for small studio sessions, rehearsals, or classroom monitoring without shared volume issues.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the PH04 require a special power supply?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It includes a 12V DC 1A power adapter, designed for reliable operation in studio or stage setups.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Fosi Audio","offers":[{"title":"Default Title","offer_id":48412541059229,"sku":"B08XZL91VT","price":42.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/9596\/1757\/files\/fosi-audio-ph04-front-panel.jpg?v=1781237363","url":"https:\/\/nexoltic.com\/products\/fosi-audio-ph04-4-channel-headphone-amplifier-ultra-compact-studio-stage","provider":"Nexoltic","version":"1.0","type":"link"}