{"product_id":"graham-slee-proprius-monoblock-power-amplifier","title":"Graham Slee Proprius Monoblock Power Amplifier","description":"The Proprius monoblock power amplifiers will each deliver a continuous 25 rms Watts into 8 Ω and 45 rms Watts into 4 Ω at less than 1% THD, but will sound a whole lot louder.\u003cbr\u003e\u003cbr\u003e\n\nThey're cute and compact but they're not class-D! They're linear class-AB for a superbly polished sound.\u003cbr\u003e\u003cbr\u003e\n\nThe Proprius is much more than an audio amplifier — it's a most incredible sounding high fidelity amplifier you've simply got to hear!\u003cbr\u003e\u003cbr\u003e\n\nWith volume controls that go all the way, these power amps can be driven by a separate preamp (for example: the Majestic pre-DAC) by parking the volume at full — or their own volume controls can be used in a minimalst system driven by a fixed output source.\u003cbr\u003e\u003cbr\u003e\n\nAs a stereo pair the volume controls can be used to balance the stereo image if there's no balance control anywhere else.\u003cbr\u003e\u003cbr\u003e\n\nBi-amping, tri-amping, and surround sound will benefit by using the Proprius volume controls, allowing you to easily adjust the tonal balance and\/or audio image placement.\u003cbr\u003e\u003cbr\u003e\n\nSimple (and Smart) Design:\u003cbr\u003e\n\nPower amps don't have to be brutish - they can be neat and compact as the Proprius shows - and at only 20.5 cm deep by 5.5 cm high by 10.5 cm wide, the Proprius is definitely neat and compact.\u003cbr\u003e\u003cbr\u003e\n\nCool running doesn't always require dark, drab and dusty heat-sink fins - clean lines are possible as the Proprius heat-exchanger case shows. It doesn't overheat even when used for long intervals at maximum output.\u003cbr\u003e\u003cbr\u003e\n\nEasy to connect and get up and running, the Proprius can be used with \"single-ended\" and \"balanced\" sources using the same single input XLR socket (left). We've got a full range of interconnect cables making it simple to obtain the right one for your Proprius amps.\u003cbr\u003e\u003cbr\u003e\n\nConnect power supply to the \"48V\" connector - both signal and power connectors are locking - and attach the speaker cable: the speaker terminals accept 4mm plugs; 8mm spades; or bare wire to 4mm diameter.\u003cbr\u003e\u003cbr\u003e\n\nThe Proprius amplifiers can be used free-standing wherever you want, or mounted on the back of speakers, making them into \"powered monitors\" using the supplied mounting kit.\u003cbr\u003e\u003cbr\u003e\n\n\nTechnical Specification:-\u003cbr\u003e\n \nPower output (rms) measured: 26 Watts into 8 Ohms; 45.5 Watts into 4 Ohms (ref 1% THD+N at 1kHz)\u003cbr\u003e \nPower bandwidth at rated power into 8 Ohms: 10Hz - 47kHz (-3dB), 20Hz - 25kHz (-1dB)\u003cbr\u003e \nPower bandwidth at rated power into 4 Ohms: 12Hz - 40kHz (-3dB) \u003cbr\u003e\nTotal harmonic distortion and noise at 8 Ohms: 100Hz: 0.043%; 1kHz: 0.047%; 5kHz: 0.061%; 10kHz: 0.085%; 20kHz: 0.125% \u003cbr\u003e\nTotal harmonic distortion and noise at 4 Ohms: 100Hz: 0.066%; 1kHz: 0.071%; 5kHz: 0.094%; 10kHz: 0.129%; 20kHz: 0.181% \u003cbr\u003e\nSignal to noise ratio in dB: \"A-weighted\": 87dB; 22Hz-22kHz \"Q-pk\": 80dB \u003cbr\u003e\nBias type Class Ab; Bias current: 60mA (approx.) \u003cbr\u003e\nInput sensitivity for rated output: 575mV rms\u003cbr\u003e \nShort circuit protection: Fuse and power supply shut-down (short circuits should be avoided to prevent component stresses)\u003cbr\u003e \nFuse: F2A 5mm x 20mm (glass \"quick-blow\" fuse rated at 2A)\u003cbr\u003e \nPower supply: 48V DC, 120 Watt - self adjusting to AC mains 100V - 240V, 47 - 63 Hz; IEC cord supplied\u003cbr\u003e \nSize (approx.): Amp W105 x H55 x D205 mm; Power supply W65 H40 D170 mm \u003cbr\u003e\u003cbr\u003e\n\nBUILT TO ORDER - 2 WEEKS \n\n\n\n","brand":"Graham Slee","offers":[{"title":"(each)","offer_id":57413236818252,"sku":"GSPROPRIUS-EACH","price":541.25,"currency_code":"GBP","in_stock":true},{"title":"(pair)","offer_id":57422928806220,"sku":"GSLEEPROPRIUS-PAIR","price":1082.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/Graham-Slee-Proprius-Monoblock.jpg?v=1777540504","url":"https:\/\/www.stoneaudio.co.uk\/products\/graham-slee-proprius-monoblock-power-amplifier","provider":"Stone Audio","version":"1.0","type":"link"}