{"product_id":"sugden-masterclass-spa-4-spa4-stereo-power-amplifier","title":"Sugden Masterclass SPA-4 (SPA4) Stereo Power Amplifier","description":"The Sugden Masterclass series of Audio equipment embodies years of experience in designing and building audio reproduction equipment. The series embraces the highest level of today's technological possibilities to obtain the ultimate level of musical performance. Technological possibilities, which include circuit topography, discreet components, and material utilisation to extend the art of music reproduction beyond the scientific to an actual soul form. The special character of the series is the result of extended periods of subjective listening and tuning of the amplifying elements to achieve the ultimate audible results.\u003cbr\u003e\u003cbr\u003e\nThe SPA-4 is a stereo version of the MPA-4 and uses the same class A circuit. The only differences are power output and the additional flexibility of both single ended and balanced inputs. Not every music lover can accommodate two substantial power amplifiers in their listening space, so a single SPA-4 could be the solution. One of the noticeable abilities of the SPA-4 is how well it works with smaller loudspeaker designs as well as large ones. Control and soundstage are two key elements of the SPA-4 making it a fine power amplifier.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\n\n\u003ch3\u003eSPA-4 Specifications\u003c\/h3\u003e\n\nInputs: ​                                    Stereo line level, stereo balanced\u003cbr\u003e\n\nOutputs:                                  Stereo pair multi-way locking binding posts\u003cbr\u003e\n\n \nInput Sensitivity:                      1Volt for full output\u003cbr\u003e\n\nPower Output:                         75 Watts into 4 Ohms both channels working\u003cbr\u003e\n\nFrequency Response:             +\/-0dB 15Hz-30kHz\u003cbr\u003e\n\nBandwidth:                             -3dB points 2Hz-200kHz\u003cbr\u003e\n\nSignal to Noise:                       \u0026gt;85dB\u003cbr\u003e\n\nGross Weight  (packed):         25kgs\u003cbr\u003e\n\nDimensions:                           250 x 430 x 350mm (hwd)","brand":"Sugden","offers":[{"title":"Sugden Masterclass SPA-4 Stereo Power Amplifier - Titanium","offer_id":57406040736076,"sku":"SMCLASSPWR","price":5303.33,"currency_code":"GBP","in_stock":true},{"title":"Sugden Masterclass SPA-4 Stereo Power Amplifier - Graphite","offer_id":57415754056012,"sku":"SUGDENSPA4G","price":5303.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/sugden_spa-4_mpa-4.jpg?v=1777452626","url":"https:\/\/www.stoneaudio.co.uk\/products\/sugden-masterclass-spa-4-spa4-stereo-power-amplifier","provider":"Stone Audio","version":"1.0","type":"link"}