{"product_id":"nuprime-sta-9x-power-amplifier-silver","title":"NuPrime STA-9X Power Amplifier - Silver","description":"\u003cdiv style=\"max-width:720px;margin:0 auto;padding:32px 24px 48px 24px;background:#ffffff;\"\u003e\n\u003ch2 style=\"font-size:1.25em;margin:0 0 0.35em 0;font-weight:600;\"\u003eNuPrime STA-9X: Compact Class A+D Stereo Power Amplifier\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eThe STA-9X is a stereo power amplifier rated 2 x 130 watts, and it bridges into a 330-watt mono amplifier. This listing is the Silver finish.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eNuPrime designed it to capture the appealing traits of tube and Class A sound without their drawbacks. Its frequency response reaches 50 kHz.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eClass A Front End, Class D Power\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eA single-ended, non-negative feedback Class A preamp stage feeds a dual-feedback Class D power stage. The design comes from NuPrime's AMG STA. NuPrime says it gives more detail and resolution than the original STA-9.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003e750 kHz Switching and Even-Order Harmonics\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eThe Class D stage uses a self-oscillating circuit that switches at 750 kHz. NuPrime notes most Class D amps switch at 300 kHz or lower. Enhanced even-order (H2) harmonic circuitry adds warmth and a natural character.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eLinear Power Supply and More Current\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eA linear power supply with a high-efficiency toroidal transformer lowers high-frequency noise and strengthens bass. Output current is 130% higher than the STA-9, helping low-impedance speakers. NuPrime's isolation feet damp vibration.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eHow the STA-9X Fits Your System\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eThe STA-9X is a power amplifier only. It has no volume control or source selection, so it needs a preamplifier or a DAC with volume control in front of it.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eIt has one balanced XLR input and one RCA input. NuPrime says not to connect both at once; a toggle switch selects which one is active. A 12V trigger lets it power on with your preamp.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eWho Is This Power Amplifier Best For?\u003c\/h2\u003e\n\u003cul style=\"margin:0 0 0.9em 0;padding-left:1.4em;line-height:1.6;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparates builders\u003c\/strong\u003e — pair it with a preamp or a DAC with volume control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpace-limited racks\u003c\/strong\u003e — it is just 55 mm tall and 235 mm wide.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraders\u003c\/strong\u003e — bridge a second STA-9X later for 330W mono per channel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-impedance speakers\u003c\/strong\u003e — it has 130% more current drive than the STA-9.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for\u003c\/strong\u003e — anyone wanting a single box with volume control and inputs; choose an integrated amplifier.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eHow Does It Connect to Your System?\u003c\/h2\u003e\n\u003cul style=\"margin:0 0 0.9em 0;padding-left:1.4em;line-height:1.6;\"\u003e\n\u003cli\u003eConnect your preamp or DAC to the XLR or RCA input, and set the toggle switch to match.\u003c\/li\u003e\n\u003cli\u003eConnect speakers to the stereo speaker outputs, or to the mono output when bridged.\u003c\/li\u003e\n\u003cli\u003eLink the 12V trigger to your preamp if it has one.\u003c\/li\u003e\n\u003cli\u003eCheck the voltage select switch matches your mains (115 or 230 VAC).\u003c\/li\u003e\n\u003cli\u003eAvailable in Black or Silver; this listing is Silver.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003ePairs Well With\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eBuild a separates system around the STA-9X:\u003c\/p\u003e\n\u003cul style=\"margin:0 0 0.9em 0;padding-left:1.4em;line-height:1.6;\"\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.audioadvisor.com\/collections\/preamplifiers\" style=\"color:#8a5a2b;\"\u003ePreamplifiers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.audioadvisor.com\/collections\/digital-to-analog-converters\" style=\"color:#8a5a2b;\"\u003eDigital to Analog Converters\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.audioadvisor.com\/collections\/interconnect-cables\" style=\"color:#8a5a2b;\"\u003eInterconnect Cables\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.audioadvisor.com\/collections\/speaker-cables\" style=\"color:#8a5a2b;\"\u003eSpeaker Cables\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eDoes the STA-9X have a volume control?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eNo. It is a power amplifier, so use a preamplifier or a DAC with volume control in front of it.\u003c\/p\u003e\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eCan I use it as a mono amplifier?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eYes. It bridges into a 330-watt mono amplifier. Two units in mono drive a stereo pair of speakers.\u003c\/p\u003e\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eCan I connect XLR and RCA at the same time?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eNo. NuPrime says not to connect both. Use the toggle switch to pick XLR or RCA.\u003c\/p\u003e\n\u003ch3 style=\"font-size:1.05em;margin:0.9em 0 0.25em 0;font-weight:600;\"\u003eHow is it different from the STA-9?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eThe STA-9X adds the AMG STA-derived Class A\/Class D design, a new linear power supply and 130% more output current.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eWhy Audio Advisor?\u003c\/h2\u003e\n\u003cul style=\"margin:0 0 0.9em 0;padding-left:1.4em;line-height:1.6;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e40+ Years of Expertise\u003c\/strong\u003e — Since 1981, we've helped over a million music lovers find the right gear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e60-Day Money-Back Guarantee\u003c\/strong\u003e — Take your time. Listen, enjoy, and make sure it's right for you.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal Experts, Real Help\u003c\/strong\u003e — Our team is here to answer your questions at 800-942-0220, weekdays 9am–6pm EST.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Shipping\u003c\/strong\u003e — On orders over $49, delivered to your door.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Payment Options\u003c\/strong\u003e — Financing available so you can start listening now.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"font-size:1.25em;margin:1.4em 0 0.35em 0;font-weight:600;\"\u003eLearn More\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 0.9em 0;line-height:1.55;\"\u003eWant to learn more about power amplifiers and separates? Visit our \u003ca href=\"https:\/\/learningcenter.audioadvisor.com\/\" style=\"color:#8a5a2b;\"\u003eLearning Center\u003c\/a\u003e for guides, tips, and expert advice.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"NuPrime","offers":[{"title":"New","offer_id":47168576454829,"sku":"NEW-NPSTA9X-SIL","price":1199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/3708\/1773\/files\/NPSTA9X-SIL_01_angle_2025.jpg?v=1793835367","url":"https:\/\/www.audioadvisor.com\/products\/nuprime-sta-9x-power-amplifier-silver","provider":"Audio Advisor","version":"1.0","type":"link"}