{"product_id":"universal-audio-apx4g2-stu","title":"Universal Audio Apollo x4 Desktop Thunderbolt Audio Interface | UAD Analog Classics Pro","description":"\u003cp\u003eThe Apollo x4 Gen 2 is built for project studio engineers, producers, and serious collaborators who need professional-grade I\/O, preamp emulation, and DSP power in a compact desktop form factor. With a 12 x 18 Thunderbolt channel count, four Unison mic preamps, dual front-panel Hi-Z inputs, and optical TOSLINK I\/O supporting both ADAT and S\/PDIF, it covers the connectivity demands of tracking sessions, overdub work, and mix-ready monitoring without requiring a rack unit.\u003c\/p\u003e\u003cp\u003eWhat sets the Apollo x4 apart from competing Thunderbolt interfaces in its class is the combination of Gen 2 D\/A conversion — delivering up to 129 dB dynamic range on monitor outputs — with onboard QUAD Core DSP that enables realtime tracking through UAD plug-ins at 1.1 ms round-trip latency at 96 kHz. Unlike native-only interfaces that offload all processing to the host CPU, Apollo x4 runs Unison preamp emulations from Neve, API, Avalon, and Manley directly on dedicated hardware, freeing the DAW for larger session counts and complex mix chains. Apollo Monitor Correction powered by Sonarworks adds calibrated playback correction for both monitors and headphones, a capability absent from most interfaces at this price point.\u003c\/p\u003e\u003cp\u003eThe UAD Console app serves as the central routing and monitoring hub, with Auto-Gain for fast level setting across all inputs, Bass Management for subwoofer integration, Plug-In Scenes for recall, and immersive audio monitoring support. The interface expands via Thunderbolt to link up to four Apollo units for up to 128 channels of I\/O, making it a scalable foundation as studio demands grow. Compatible with LUNA, Pro Tools, Logic Pro, Cubase, Ableton Live, and all major DAWs via VST, AU, and AAX 64 formats.\u003c\/p\u003e","brand":"Universal Audio","offers":[{"title":"With UAD Analog Classics Pro","offer_id":52450936094904,"sku":"146473","price":2299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/7382\/4696\/files\/146473_UNIAUD-APX4G2-STU_ALT05sqr_9ab2a077-b5ef-4acd-983a-d457b5f13096.jpg?v=1784137672","url":"https:\/\/soundpro.com\/products\/universal-audio-apx4g2-stu","provider":"SoundPro","version":"1.0","type":"link"}