{"product_id":"apos-certified-smsl-pa-x-gallium-nitride-power-amplifier","title":"SMSL PA-X Gallium Nitride Power Amplifier (Apos Certified)","description":"\u003ch1\u003e\u003cstrong\u003eA smarter way to power your speakers\u003c\/strong\u003e\u003c\/h1\u003e\n \u003cp\u003eThe SMSL PA-X isn’t flashy. It’s not oversized. And it doesn’t try to be anything other than what it is—a lean, high-performance power amplifier built around next-gen Gallium Nitride transistors. With ultra-low distortion (0.003% THD+N), 115dB signal-to-noise ratio, stereo and mono modes, and over 500W of output in mono, it’s as clean and powerful as anything in its class. Built for transparency, reliability, and simplicity, the PA-X is a solid choice for audiophiles looking to drive passive speakers without the noise, bulk, or fanfare.\u003c\/p\u003e\n \u003ch2\u003e\u003cstrong\u003eGallium Nitride power, made practical\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cp\u003eThe PA-X uses a new Infineon GaN (Gallium Nitride) power transistor—an upgrade over traditional silicon FETs. With switching frequencies up to 1MHz, this design improves clarity, speed, and bandwidth, especially across high and mid frequencies. It’s a smart way to reduce distortion while preserving dynamic range, without relying on bulky heat sinks or exotic circuitry.\u003c\/p\u003e\n \u003ch2\u003e\u003cstrong\u003eMono mode for more muscle\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cp\u003eRunning a single PA-X in stereo gives you 200W into 8Ω and 250W into 4Ω. But if you’re running demanding speakers—or just want more power—you can switch into mono mode. With XLR mono input engaged, the amp outputs 500W into 8Ω. Perfect for towers, subs, or big 2-channel systems where a pair of mono blocks makes more sense.\u003c\/p\u003e\n \u003ch2\u003e\u003cstrong\u003eDesigned for daily driving\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cp\u003eHigh-end internals don’t mean high maintenance. The PA-X uses a custom high-power switching supply that’s designed specifically for audio—not just adapted from industrial power designs. Overcurrent and overheating protections keep things running smoothly even during long sessions, and standby power usage stays under 0.5W.\u003c\/p\u003e\n \u003ch2\u003e\u003cstrong\u003eClean signal in, clean signal out\u003c\/strong\u003e\u003c\/h2\u003e\n \u003cp\u003eGold-plated RCA and XLR inputs ensure strong, low-resistance connections to your DAC or preamp. A front-mounted volume knob and screen make it easy to check your level at a glance, while the included remote lets you manage playback from your couch.\u003c\/p\u003e\n \u003ch3\u003e\u003cstrong\u003eProduct highlights\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003eGallium Nitride power transistor (Infineon)\u003c\/li\u003e\n \u003cli\u003eUp to 1MHz switching frequency\u003c\/li\u003e\n \u003cli\u003e115dB SNR\u003c\/li\u003e\n \u003cli\u003eUltra-low THD+N of 0.003%\u003c\/li\u003e\n \u003cli\u003eStereo and mono modes\u003c\/li\u003e\n \u003cli\u003eRCA, balanced XLR, and mono XLR inputs\u003c\/li\u003e\n \u003cli\u003eCustom high-power switching supply for audio\u003c\/li\u003e\n \u003cli\u003eGold-plated input and output terminals\u003c\/li\u003e\n \u003cli\u003eOvercurrent and overheating protection circuits\u003c\/li\u003e\n \u003cli\u003e250W x2 @ 4Ω \/ 200W x2 @ 8Ω (stereo)\u003c\/li\u003e\n \u003cli\u003e500W x1 @ 8Ω (mono)\u003c\/li\u003e\n \u003cli\u003eRemote control included\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3\u003e\u003cstrong\u003eSpecs\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003eInputs: Balanced (XLR) \/ Line in (RCA) \/ Mono (XLR)\u003c\/li\u003e\n \u003cli\u003eTHD+N: 0.003%\u003c\/li\u003e\n \u003cli\u003eSNR: 115dB\u003c\/li\u003e\n \u003cli\u003eChannel separation: 75dB\u003c\/li\u003e\n \u003cli\u003eInput sensitivity:\n \u003cul\u003e\n \u003cli\u003eRCA: 0.96Vrms \/ 22kΩ\u003c\/li\u003e\n \u003cli\u003eXLR: 2.1Vrms \/ 22kΩ\u003c\/li\u003e\n \u003cli\u003eMono XLR: 2.7Vrms \/ 22kΩ\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eOutput power:\n \u003cul\u003e\n \u003cli\u003eStereo 4Ω: 250Wrms x2\u003c\/li\u003e\n \u003cli\u003eStereo 8Ω: 200Wrms x2\u003c\/li\u003e\n \u003cli\u003eMono 8Ω: 500Wrms x1\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/li\u003e\n \u003cli\u003eStandby power: \u0026lt;0.5W\u003c\/li\u003e\n \u003cli\u003ePower consumption: 40W (at normal volume)\u003c\/li\u003e\n \u003cli\u003eDimensions: 8.8in x 2in x 9.8in (222.5mm x 51mm x 250mm)\u003c\/li\u003e\n \u003cli\u003eWeight: 5.67lbs (2.57kg)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3\u003e\u003cstrong\u003eWhat’s included\u003c\/strong\u003e\u003c\/h3\u003e\n \u003cul\u003e\n \u003cli\u003eSMSL PA-X amplifier\u003c\/li\u003e\n \u003cli\u003eRemote control\u003c\/li\u003e\n \u003cli\u003ePower cord\u003c\/li\u003e\n \u003cli\u003eUser manual\u003c\/li\u003e\n \u003c\/ul\u003e","brand":"SMSL","offers":[{"title":"Open Box - Like New","offer_id":46866218123439,"sku":"APS-AC-1011-1-LN","price":550.0,"currency_code":"USD","in_stock":true},{"title":"Open Box - Acceptable","offer_id":46866218156207,"sku":"APS-AC-1011-1-A","price":500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6415\/2239\/files\/apos-audio-smsl-speaker-amp-smsl-pa-x-gallium-nitride-power-amplifier-apos-certified-refurbished-like-new-1182395286.jpg?v=1777716324","url":"https:\/\/freshized.com\/products\/apos-certified-smsl-pa-x-gallium-nitride-power-amplifier","provider":"Freshized","version":"1.0","type":"link"}