{"product_id":"perreaux-prisma-350-stereo-power-amplifier","title":"Perreaux Prisma 350 Stereo Power Amplifier","description":"\n\u003cbr\u003eRugged Build Quality. Mechanical strength has been a hallmark of Perreaux products since the company first started production back in 1974. The concept behind the physical design and construction is that each structural member should contribute to both rigidity and performance.\u003cbr\u003e\u003cbr\u003eUltra Stiff Power Supply. The 350 incorporates a massive custom designed, toroidal power transformer, employing unusually heavy gauge wire that reduces copper losses to a minimum. An electrostatic shield prevents AC line borne interference from entering the signal path. The power supply filter capacitors, totaling 60, 000uF (30, 000uF per channel), have exceptionally low inductance and internal resistance.\u003cbr\u003e\u003cbr\u003eHybrid Class-A\/AB. The bi-polar transistors used in the 350 are operating in Class-A. This avoids the crossover notch distortion and the resulting odd-order harmonics present, to some degree, in all other classes of operation. The devices used in the 350 output stage are MOSFETs, which with high quiescent current circuitry, are run in the equivalent of Class-A to 10 watts. Beyond this point the output class is technically Class AB (hence the hybrid nomenclature), but with a major difference.\u003cbr\u003e\u003cbr\u003eMOSFET Output Stage. The 350 output stage takes full advantage of the unique qualities of MOSFET devices and in many ways they are superior to bi-polar transistors.\u003cbr\u003e\u003cbr\u003eAll this leads to an absolutely incredible 80amps per channel drive capability, which allows absolute and consummate control of any loudspeaker.\u003cbr\u003e\u003cbr\u003eMultiple Protection Systems, The 350 incorporates a full range of protection circuits, isolated from all signal carrying circuits via opto-couplers. However, these circuits are aimed at ensuring an extremely high safety margin for these high-powered products rather than as a mandatory addition to correct for poor or overloaded circuit topologies.\u003cbr\u003e \u003ch3\u003eTechnical data\u003c\/h3\u003e\n\u003cbr\u003eContinuous Power Ouput (per channel):    \u003cbr\u003e350Wrms into 8\u003cbr\u003e600Wrms into 4\u003cbr\u003e\u003cbr\u003eTotal Harmonic Distortion (THD+N):    \u003cbr\u003eTypically    0.004% @ 1kHz into 8\u003cbr\u003e20Hz to 20kHz    \u0026lt;0.02% into 8\u003cbr\u003e\u003cbr\u003eFrequency Response:    \u003cbr\u003e20Hz-25kHz, ±0.25dB\u003cbr\u003e\u003cbr\u003eHum \u0026amp; Noise (unweighted):    \u003cbr\u003e-100dB, ref. rated output\u003cbr\u003e\u003cbr\u003eDynamic Headroom (rated with music):    \u003cbr\u003e\u0026gt;1.1dB\u003cbr\u003e\u003cbr\u003eMaximum Current Output:    \u003cbr\u003e80A per channel\u003cbr\u003e\u003cbr\u003eDamping Factor:    \u003cbr\u003e\u0026gt;700 @ 1kHz into 8\u003cbr\u003e\u003cbr\u003eGain    \u003cbr\u003e30.7dB\u003cbr\u003e\u003cbr\u003eInput Impedance:    \u003cbr\u003e  Unbalanced    22k\u003cbr\u003e  Balanced    3.3k\u003cbr\u003e\u003cbr\u003eInput Sensitivity:    \u003cbr\u003e  Unbalanced    1.5Vrms\u003cbr\u003e  Balanced    ±0.78Vrms]\u003cbr\u003e\u003cbr\u003eDimensions:\u003cbr\u003e  Width - 430mm (16.9\")\u003cbr\u003e  Height - 186mm (7.3\")\u003cbr\u003e  Depth - 497mm (19.6\")\u003cbr\u003e\u003cbr\u003eWeight:    30.0kg (66.1lb)\u003cbr\u003e ","brand":"Perreaux","offers":[{"title":"Default Title","offer_id":51938206220554,"sku":"PERREAUX-3767","price":7695.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/3283\/6618\/files\/perreaux-prisma-350-stereo-power-amplifier-10902-p.jpg?v=1760361424","url":"https:\/\/audioemotion.co.uk\/products\/perreaux-prisma-350-stereo-power-amplifier","provider":"Audio Emotion Limited","version":"1.0","type":"link"}