{"product_id":"nuprimeamgsta","title":"NuPrime AMG STA-SE Stereo Power Amplifier, Grey","description":"\u003cp\u003eThe NuPrime AMG STA-SE is a Class A+D hybrid stereo power amplifier that delivers 2× 130 watts into 8 ohms and can be bridged to mono for more power.\u003c\/p\u003e\u003cp\u003eThe SE stands for Special Edition – NuPrime's reworked version of the AMG STA. It combines a single-ended Class A stage with a Class D power section: the finesse of one world, the efficiency and power of the other. Sounds like an attempt to square the circle – and it comes remarkably close.\u003c\/p\u003e\u003ch2\u003eWhy the AMG STA-SE?\u003c\/h2\u003e\u003cp\u003eThe idea behind Class A+D: a single-ended Class A input stage shapes the tone, a double-feedback Class D module delivers the power. The high switching frequency of over 700 kHz keeps the Class D module clean, and because it generates little heat, the amplifier runs cool and stable.\u003c\/p\u003e\u003cp\u003eAll of this is fed by a linear power supply with a toroidal transformer – the reserve that, with powerful bass impulses, makes the difference between \"stands firm\" and \"buckles\". The JFET input stage with 1 MΩ takes the preamp's signal gently.\u003c\/p\u003e\u003ch2\u003eWhat you hear\u003c\/h2\u003e\u003cp\u003e2× 130 watts into 8 ohms, 2× 200 watts into 4 ohms: enough control that even low-efficiency speakers don't wobble. The very low output impedance (20 mΩ) gives a firm grip on the bass without the mids drying out.\u003c\/p\u003e\u003cp\u003eNeed more? Bridged, the STA-SE works as a mono power amplifier with roughly 300 watts into 8 ohms – two of them then make a powerful monoblock pair. So the power amplifier grows with your demands.\u003c\/p\u003e\u003ch2\u003eVideo\u003c\/h2\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;max-width:100%;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/SP-vdUpMYuk\" title=\"NuPrime Audio AMG Series\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\u003ch3\u003eWho is the AMG STA-SE for?\u003c\/h3\u003e\u003cp\u003eFor anyone looking for a compact, powerful stereo power amplifier with the option of mono operation – ideal as a partner to the AMG PRA or AMG DAC. If you push your speakers hard, you'll find plenty of reserve here.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHonestly:\u003c\/strong\u003e there are no sources, volume control, or streaming here – the STA-SE is a pure power amplifier and needs a preamp in front of it. If you want an all-in-one device, an integrated amplifier is the better choice. If you deliberately separate preamp and power amp, you get a lot of power amp for your money here.\u003c\/p\u003e\u003ch2\u003eOur verdict\u003c\/h2\u003e\u003cp\u003eThe AMG STA-SE is a surprisingly powerful, cool-running power amplifier with a hybrid Class A+D signature. Technic3D credits the AMG STA with a design ideally suited to relaxed listening to classical, jazz, blues, or folk; Christiaan Punter awarded the SE version the HFA Award at HiFi-Advice in 2024 and attests that it improved on every point criticised before. We at HD Zürisee in Wädenswil like how confidently and calmly it also handles loud passages.\u003c\/p\u003e\u003ch2\u003eTechnical data\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Class A+D hybrid stereo power amplifier (single-ended Class A + double-feedback Class D), bridgeable to mono\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching frequency:\u003c\/strong\u003e over 700 kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput stage:\u003c\/strong\u003e JFET, 1 MΩ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply:\u003c\/strong\u003e linear power supply with toroidal transformer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower (stereo):\u003c\/strong\u003e 2× 130 W @ 8 Ω, 2× 200 W @ 4 Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower (mono, bridged):\u003c\/strong\u003e 300 W @ 8 Ω, 320 W @ 4 Ω\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated\/peak current:\u003c\/strong\u003e 10 A \/ 15 A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGain:\u003c\/strong\u003e 28.3 dB (stereo) \/ 34.3 dB (mono)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensitivity:\u003c\/strong\u003e 1.2 Vrms (stereo) \/ 0.95 Vrms (mono)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput impedance:\u003c\/strong\u003e 1 MΩ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput impedance:\u003c\/strong\u003e 20 mΩ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignal-to-noise ratio:\u003c\/strong\u003e 100 dB @ 10 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTHD+N:\u003c\/strong\u003e 0.006 %\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency response:\u003c\/strong\u003e 10 Hz – 50 kHz (±0.2 dB @ 8 Ω), 58 kHz @ -3 dB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (W × H × D):\u003c\/strong\u003e 235 × 55 × 300 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 4.5 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Grey\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2 years\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eHow much power does the NuPrime AMG STA-SE have?\u003c\/strong\u003e\u003cbr\u003eIn stereo operation, the AMG STA-SE delivers 2× 130 watts into 8 ohms and 2× 200 watts into 4 ohms. Bridged as a mono power amplifier, it's up to 320 watts into 4 ohms. That lets it drive even more demanding speakers effortlessly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I bridge the AMG STA-SE as a mono power amplifier?\u003c\/strong\u003e\u003cbr\u003eYes. The AMG STA-SE can be bridged into mono mode, then delivering around 300 watts into 8 ohms. That way you can build a powerful monoblock setup with two units, or run one unit in stereo – depending on your system and speakers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Class A+D hybrid concept mean?\u003c\/strong\u003e\u003cbr\u003eIt combines a single-ended Class A stage with a double-feedback Class D module. This is meant to combine the sonic finesse of Class A with the efficiency and power of Class D. The high switching frequency above 700 kHz and the JFET input stage keep detail and composure high.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich preamp suits the AMG STA-SE?\u003c\/strong\u003e\u003cbr\u003eThe AMG STA-SE is a pure power amplifier and needs a preamp in front of it. From NuPrime's own range, the AMG PRA fits, or alternatively the AMG DAC with volume control. Thanks to the 1 MΩ input stage, it also harmonises with many other preamps.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy the NuPrime AMG STA-SE at HD Zürisee?\u003c\/strong\u003e\u003cbr\u003eBecause the power needs to suit your speakers and your room. We advise you on stereo or mono operation, the right preamp, and take care of installation and service with our own technician. Call, write, or come to Wädenswil.\u003c\/p\u003e\u003ch2\u003eGoes well with\u003c\/h2\u003e\u003cp\u003eTo let the AMG STA-SE unfold its power, we've put together the right categories:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThe matching preamp: \u003ca href=\"\/en-ch\/collections\/vorverstarker\"\u003ePreamplifiers\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eOr as a source\/preamp: \u003ca href=\"\/en-ch\/collections\/dac\"\u003eDAC\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003ePlus the \u003ca href=\"\/en-ch\/collections\/lautsprecher\"\u003eSpeakers\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe right connection: \u003ca href=\"\/en-ch\/collections\/lautsprecherkabel\"\u003eSpeaker cables\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eMore from the series: \u003ca href=\"\/en-ch\/collections\/nuprime\"\u003eNuPrime\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NuPrime","offers":[{"title":"Default Title","offer_id":52989544202576,"sku":"NP-AMG-STA-SE","price":1999.0,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0932\/3262\/8048\/files\/nuprime-amg-sta-se-stereo-endstufe-frontansicht.jpg?v=1786610644","url":"https:\/\/hdzuerisee.ch\/en-ch\/products\/nuprimeamgsta","provider":"HD Zürisee AG","version":"1.0","type":"link"}