{"product_id":"audio-research-s-100-stereo-power-amplifier","title":"Audio Research S-100 Stereo Power Amplifier","description":"\u003ch1\u003eAudio Research S-100 Stereo Power Amplifier\u003c\/h1\u003e\n\u003ch3\u003e100 Wpc, Dual-Mono Construction, and Fully Balanced Circuitry in Audio Research’s Most Accessible S-Series Power Amplifier\u003c\/h3\u003e\n\u003cp\u003eThe Audio Research S-100 brings the company’s latest solid-state amplifier platform to a more compact, lower-powered design. Rated at 100 Wpc into 8 ohms and 200 Wpc into 4 ohms, it combines substantial current capability with the engineering priorities Audio Research has developed through decades of both solid-state and tube amplifier design.\u003c\/p\u003e\n\u003cp\u003eLike the larger S-200, the S-100 is a class-AB amplifier built on a dual-mono platform. Dual toroidal transformers support its ability to double rated output into 4 ohms, while the stereo circuit is fully balanced. Audio Research also specifies bipolar output transistors rather than MOSFETs, a choice the company attributes to their purity, transparency, and dynamic performance.\u003c\/p\u003e\n\u003ch4\u003eModern S-Series Construction\u003c\/h4\u003e\n\u003cp\u003eThe S-100 uses a machined aluminum chassis available in black or silver anodized finishes. Its industrial design retains recognizable Audio Research cues while taking a cleaner, more contemporary approach, including custom-machined heat sinks and no visible fasteners from the front or top.\u003c\/p\u003e\n\u003ch4\u003eBuilt and Evaluated in Minnesota\u003c\/h4\u003e\n\u003cp\u003eAudio Research describes the S-100 and S-200 as its latest and most advanced solid-state amplifier designs. Following measurement and bench testing, each amplifier is also evaluated by ear in keeping with the company’s longstanding development process. S-Series amplifiers are produced at Audio Research’s Minnesota facility alongside its Reference tube amplifiers.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e100 Wpc into 8 ohms and 200 Wpc into 4 ohms\u003c\/li\u003e\n\u003cli\u003eClass-AB operation\u003c\/li\u003e\n\u003cli\u003eDual-mono architecture with dual toroidal transformers\u003c\/li\u003e\n\u003cli\u003eFully balanced stereo circuit\u003c\/li\u003e\n\u003cli\u003eBipolar transistor design\u003c\/li\u003e\n\u003cli\u003eBalanced and single-ended input capability\u003c\/li\u003e\n\u003cli\u003eMachined aluminum chassis\u003c\/li\u003e\n\u003cli\u003eCustom-machined heat sinks\u003c\/li\u003e\n\u003cli\u003eBlack or silver anodized finish\u003c\/li\u003e\n\u003cli\u003eMade 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 100 Wpc into 8 ohms; 200 Wpc into 4 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eTotal Harmonic Distortion (1 kHz, 8 Ohms):\u003c\/b\u003e \u0026lt;0.1% from 0.25 W to rated output\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eBalanced Input Sensitivity:\u003c\/b\u003e 1.4 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 26 dB\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\u003eNoise:\u003c\/b\u003e \u0026lt;60 µV output\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\u003ePower Requirements (120 VAC):\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 (W × H × D):\u003c\/b\u003e 19\" × 7\" × 17.5\" (482.6 × 177.8 × 444.5 mm)\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\n","brand":"Audio Research","offers":[{"title":"Black","offer_id":53876969603256,"sku":"ARC-S100-BLK","price":9450.0,"currency_code":"USD","in_stock":true},{"title":"Natural (Silver)","offer_id":53876969636024,"sku":"ARC-S100-NAT","price":9450.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/S-100-front-web.jpg?v=1786387388","url":"https:\/\/upscaleaudio.com\/products\/audio-research-s-100-stereo-power-amplifier","provider":"Upscale Audio","version":"1.0","type":"link"}