{"product_id":"nuprime-amg-pra-preamplifier","title":"NuPrime AMG PRA Balanced Analog Preamplifier","description":"\u003cp\u003e\u003cstrong\u003eThe NuPrime AMG PRA is a fully balanced analog preamplifier with 1MΩ input impedance, a single-ended Class A JFET input stage and a MUSES72320 volume control.\u003c\/strong\u003e NuPrime designed it to be transparent with a distinctive character of its own: a user-selectable four-stage low frequency and harmonic gain control adds bass presence for smaller speakers. At HiFi Boutique it ships free anywhere in the USA, with sales tax already included.\u003c\/p\u003e\n\n\u003ch2\u003eNuPrime AMG PRA at a Glance\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput impedance:\u003c\/strong\u003e 1MΩ on balanced and line inputs, 10Hz to 200kHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput stage:\u003c\/strong\u003e ultra-wide-bandwidth low-noise JFET, single-ended Class A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVolume:\u003c\/strong\u003e MUSES72320 highly linear volume control\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOp-amps:\u003c\/strong\u003e MUSES8920\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e fully balanced inputs and outputs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e four-stage loudness, high and low gain, phase invert\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency response:\u003c\/strong\u003e 10Hz to 200kHz (0 to -0.1dB)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e grey\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose the AMG PRA\u003c\/h2\u003e\n\u003cp\u003eThe AMG PRA isolates its audio signal from the power circuit. A star-topology power and ground board sits apart from the preamplifier board, separated by an isolation layer. NuPrime describes the result as a transparent sound that is natural and not over-etched.\u003c\/p\u003e\n\u003cp\u003eThe JFET input and MUSES8920 op-amps produce harmonics similar to tube amplifiers, which NuPrime describes as warm, airy and velvety. Rather than a simple bass boost, the loudness control uses a non-feedback low-frequency harmonic modulation circuit to extend bass with a natural roll-off and minimal phase distortion.\u003c\/p\u003e\n\u003cp\u003eThe AMG front panel is milled from 15mm hardened aerospace aluminum alloy on a four-axis CNC machine with a diamond cutter, in a 48-step process, with a 3D floating logo and diamond-cut edges.\u003c\/p\u003e\n\n\n\u003ch3\u003eFront Panel Controls\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLeft toggle: high or low output gain\u003c\/li\u003e\n  \u003cli\u003eRight toggle: normal or inverted phase\u003c\/li\u003e\n  \u003cli\u003eLeft knob: loudness compensation, off or levels 1 to 3\u003c\/li\u003e\n  \u003cli\u003eRight knob: press for input selection, hold 3 seconds for standby, turn for volume\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For and System Pairing\u003c\/h2\u003e\n\u003cp\u003eThe AMG PRA is for a system with analog sources and a separate power amplifier. Its gain and phase settings help it match different amplifiers. Pair it with the \u003ca href=\"\/products\/nuprime-amg-sta-se-stereo-amplifier\" title=\"NuPrime AMG STA-SE\"\u003eNuPrime AMG STA-SE\u003c\/a\u003e or a pair of \u003ca href=\"\/products\/nuprime-amg-one-mono-amplifier\" title=\"AMG One\"\u003eAMG One\u003c\/a\u003e mono amplifiers in the same chassis. Browse the full \u003ca href=\"\/collections\/nuprime\" title=\"NuPrime collection at HiFi Boutique\"\u003eNuPrime collection\u003c\/a\u003e to build out your system.\u003c\/p\u003e\n\n\u003ch2\u003eAMG PRA Specifications\u003c\/h2\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth style=\"text-align:left; padding:8px; border:1px solid #ddd;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"text-align:left; padding:8px; border:1px solid #ddd;\"\u003eAMG PRA\u003c\/th\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eAMG PRA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eProduct Type\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eFully balanced analog preamplifier\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eInput Impedance\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1MΩ, 10Hz – 200kHz (balanced and line)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eRated Input Voltage\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e8V balanced; 4V line\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eRated Output Voltage\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e2V line; 4V balanced (@ 100Ω)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e10Hz – 200kHz (0 to -0.1dB)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eTHD\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e0.008%\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eS\/N\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e95dB\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eGain\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e10.10dB (high); 6.44dB (low)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eLoudness Compensation\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e2.2dB (125Hz); 4.5dB (100Hz); 5.3dB (75Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eGrey\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eDimensions (H x W x D)\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e55 x 235 x 300 mm (2.2 x 9.3 x 11.8 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eNet Weight\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e3.5 kg (7.7 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eShipping Weight\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e5 kg (11 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eNuPrime AMG PRA FAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat does the loudness control do?\u003c\/h3\u003e\n\u003cp\u003eIt adds bass presence in three stages (up to 5.3dB at 75Hz) with a natural roll-off. NuPrime notes it adds warmth and impact rather than volume.\u003c\/p\u003e\n\n\u003ch3\u003eIs the AMG PRA balanced?\u003c\/h3\u003e\n\u003cp\u003eYes. Its inputs and outputs are fully balanced, with line outputs as well.\u003c\/p\u003e\n\n\u003ch3\u003eWhy does 1MΩ input impedance matter?\u003c\/h3\u003e\n\u003cp\u003eA very high input impedance places almost no load on the source, so the source output is passed through with minimal interaction.\u003c\/p\u003e\n\n\u003ch3\u003eCan I invert phase?\u003c\/h3\u003e\n\u003cp\u003eYes, with the right-hand toggle switch on the front panel.\u003c\/p\u003e\n\n\u003ch3\u003eWhat warranty does the NuPrime AMG PRA have?\u003c\/h3\u003e\n\u003cp\u003eNuPrime lists a 2-year manufacturer warranty for the AMG PRA.\u003c\/p\u003e\n\n\u003ch3\u003eDoes HiFi Boutique charge shipping or sales tax on the AMG PRA?\u003c\/h3\u003e\n\u003cp\u003eNo. The AMG PRA ships free anywhere in the USA, and sales tax is already included, so the price you see is what you pay.\u003c\/p\u003e\n\n\n\u003ch2\u003eShipping and Pricing at HiFi Boutique\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFree shipping anywhere in the USA, with sales tax included in the price.\u003c\/strong\u003e No extra fees at checkout.\u003c\/p\u003e","brand":"NuPrime","offers":[{"title":"Default Title","offer_id":50852195598533,"sku":"NP-AMG-PRA","price":1799.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0607\/3643\/8469\/files\/AMG_PRE_3.jpg?v=1793472194","url":"https:\/\/www.hifiboutique.us\/products\/nuprime-amg-pra-preamplifier","provider":"HiFi Boutique","version":"1.0","type":"link"}