{"product_id":"audio-research-s-200-stereo-power-amplifier","title":"Audio Research S-200 Stereo Power Amplifier","description":"\u003ch1\u003eAudio Research S-200 Stereo Power Amplifier\u003c\/h1\u003e\n\u003ch3\u003e200 Wpc, True Dual-Mono Construction, and Fully Balanced Circuitry in Audio Research’s Solid-State S Series\u003c\/h3\u003e\n\u003cp\u003eThe Audio Research S-200 is a 200-watt-per-channel stereo power amplifier and one of the company’s latest solid-state designs. A pure class-AB amplifier, it combines a linear power supply with true dual-mono construction, using two toroidal transformers to feed fully balanced stereo circuits.\u003c\/p\u003e\n\u003cp\u003eRated power doubles from 200 Wpc into 8 ohms to 400 Wpc into 4 ohms, giving the S-200 substantial output for demanding loudspeaker systems. Audio Research chose bipolar output transistors rather than MOSFETs, citing their purity, transparency, and dynamic performance as reasons for the design choice.\u003c\/p\u003e\n\u003ch4\u003eDual-Mono Architecture\u003c\/h4\u003e\n\u003cp\u003eBeyond the shared AC input, the S-200 is built around a dual-mono platform with separate toroidal power transformers. The amplifier's balanced circuit architecture continues Audio Research's long-standing emphasis on fully balanced designs while bringing that approach to the company's newest generation of solid-state amplification.\u003c\/p\u003e\n\u003ch4\u003eA New Look for Audio Research\u003c\/h4\u003e\n\u003cp\u003eThe S-200's machined aluminum chassis is available in black or silver anodized finishes. Custom-machined heat sinks and the absence of visible fasteners on the front and top give the amplifier a cleaner, more contemporary interpretation of classic Audio Research industrial design.\u003c\/p\u003e\n\u003cp\u003eFront-panel power-output meters follow the style of Audio Research's current meter designs, using a solid black background rather than the transparent Ghost Meters found on the company's Reference amplifiers.\u003c\/p\u003e\n\u003ch4\u003eBuilt in Minnesota\u003c\/h4\u003e\n\u003cp\u003eAudio Research builds its S Series amplifiers at its Minnesota facility alongside its Reference tube amplifiers. Following measurement and bench testing, each amplifier is also evaluated by ear as part of the company's established production process.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e200 Wpc into 8 ohms and 400 Wpc into 4 ohms\u003c\/li\u003e\n\u003cli\u003ePure class-AB amplifier design\u003c\/li\u003e\n\u003cli\u003eTrue dual-mono architecture\u003c\/li\u003e\n\u003cli\u003eDual toroidal power transformers\u003c\/li\u003e\n\u003cli\u003eFully balanced stereo circuitry\u003c\/li\u003e\n\u003cli\u003eBipolar output transistors\u003c\/li\u003e\n\u003cli\u003eBalanced and single-ended inputs\u003c\/li\u003e\n\u003cli\u003eFront-panel power-output meters\u003c\/li\u003e\n\u003cli\u003eMachined aluminum chassis with custom-machined heat sinks\u003c\/li\u003e\n\u003cli\u003eBlack or silver anodized finish\u003c\/li\u003e\n\u003cli\u003eManufactured at Audio Research's Minnesota facility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003ePower Output:\u003c\/b\u003e 200 Wpc into 8 ohms; 400 Wpc into 4 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTHD (1 kHz, 8 Ohms):\u003c\/b\u003e \u0026lt;0.1% from 0.25 W to rated output\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Sensitivity:\u003c\/b\u003e 1.8 V RMS for rated output\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eInput Impedance:\u003c\/b\u003e 100 kΩ, balanced or single-ended\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eGain:\u003c\/b\u003e Non-inverting; balanced input pin 2+ (IEC-268)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNoise:\u003c\/b\u003e 100 dB\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFrequency Response:\u003c\/b\u003e ±0.1 dB, 20 Hz–20 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDamping Factor:\u003c\/b\u003e 300, 20 Hz–1 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Requirements (120 V AC):\u003c\/b\u003e 0.25 W standby; 48 W on at idle; 475 W at rated output\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDimensions (H × W × D):\u003c\/b\u003e 7\" × 19\" × 17.5\" (17.78 × 48.26 × 44.45 cm)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eShipping Weight:\u003c\/b\u003e 63 lb. (28.5 kg)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eWeight:\u003c\/b\u003e 41 lb. (19 kg)\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Black","offer_id":53876969734328,"sku":"ARC-S200-BLK","price":12950.0,"currency_code":"USD","in_stock":true},{"title":"Natural (Silver)","offer_id":53876969767096,"sku":"ARC-S200-NAT","price":12950.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/S-200-front.jpg?v=1786386716","url":"https:\/\/upscaleaudio.com\/products\/audio-research-s-200-stereo-power-amplifier","provider":"Upscale Audio","version":"1.0","type":"link"}