{"title":"Audio Research","description":"","products":[{"product_id":"audio-research-reference-5se-vacuum-tube-preamplifier","title":"Audio Research Reference 5SE - Vacuum Tube Preamplifier","description":"\u003cp class=\"remove-bottom\"\u003eWhen Audio Research built the Reference 1 preamp it was the very best preamplifier they could build with currently available technology. Over the years as better components became available successive models improved on performance, opening up new world of realism in audio systems.  The REF 5SE's sound and ability to peel back the layer of music is very close to the current 6SE which now retails for $22,500.  Even at half of that price the 5SE would be a fantastic steal as it has the same DNA and signature transparency and revealing emotional impact.\u003cbr\u003e\u003cbr\u003eIf you're ready to hear your music open up, come to life and be completely revealed more than ever before you owe it to yourself to experience the Ref 5SE. Read the reviews and see what you're missing.\u003cbr\u003e\u003cbr\u003eThis unit was acquired from a local client who loved his gear with great care. Lets just say this unit is indiscernible from a brand new unit. \u003cbr\u003e\u003cbr\u003eThe original remote, manual, box \/ packing and certificate of inspection are included. You won't find a cleaner and nicer REF 5SE preamp. Total tube hours is 500.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eFEATURES:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTubed preamplifier with six sets of balanced and unbalanced inputs\u003c\/li\u003e\n\u003cli\u003eThree sets of balanced and unbalanced outputs\u003c\/li\u003e\n\u003cli\u003eUnity-gain Processor input (Home theater bypass)\u003c\/li\u003e\n\u003cli\u003eTube complement: 6550C and 6H30P (power-supply regulation)\u003c\/li\u003e\n\u003cli\u003eFour 6H30P (dual triodes).\u003c\/li\u003e\n\u003cli\u003eFrequency response: 0.2Hz–200kHz, +0\/–3dB, at rated output (balanced, 200k ohms load).\u003c\/li\u003e\n\u003cli\u003eMaximum voltage gain, main output (single-ended or balanced input): 12dB, balanced output; 6dB, single-ended output.\u003c\/li\u003e\n\u003cli\u003eDistortion: \u0026lt;0.01% at 2V RMS, balanced output.\u003c\/li\u003e\n\u003cli\u003eInput impedance: 120k ohms balanced, 60k ohms single-ended.\u003c\/li\u003e\n\u003cli\u003eOutput impedance: 600 ohms balanced, 300 ohms single-ended main, 20k ohms minimum load and 2000pF maximum capacitance.\u003c\/li\u003e\n\u003cli\u003eOutput polarity: non-inverting.\u003c\/li\u003e\n\u003cli\u003eMaximum input: 20V RMS maximum balanced, 10V RMS single-ended.\u003c\/li\u003e\n\u003cli\u003eRated output: 2V RMS (1V RMS single-ended) into 200k ohm balanced load (maximum balanced output capability is 30V RMS at \u0026lt;0.5% THD at 1kHz).\u003c\/li\u003e\n\u003cli\u003eNoise: 1.7µV RMS residual IHF-weighted balanced noise output with volume control at \"1\" (109dB below 2V RMS output).\u003c\/li\u003e\n\u003cli\u003ePower consumption: standby, 2W; full output, 130W.\u003c\/li\u003e\n\u003cli\u003eDimensions: 19\" (485mm) W by 7\" (178mm) H by 15.5\" (394mm) D. 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The sound is natural, dynamic, and highly refined, enhancing both large ensembles and subtle nuances. Its dual-chassis design includes a dedicated power supply. With premium materials and craftsmanship, the Reference 10 offers a significant leap in performance, creating a more immersive and authentic listening experience.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e +0 -3dB 0.1Hz to 200kHz at rated output.\u003cbr\u003e(BALANCED, 200k ohms load.)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDistortion:\u003c\/strong\u003e Less than .006% at 2V RMS Balanced output\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGain:\u003c\/strong\u003e Main output (SE or BAL input)12dB Balanced output,\u003cbr\u003e6dB Single Ended output. 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Often overlooked in audio systems, the preamplifier plays a critical role, and the LS28SE elevates performance with organic tone and refined detail. It brings new vitality and realism to systems, unlocking musical nuances that lesser preamps fail to reveal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e +0-3dB, 0.4Hz to 200kHz at rated output\u003cbr\u003e(Balanced, 200k ohms load)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTHD+Noise: \u003c\/strong\u003eLess than .007% at 2V RMS BAL output\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNoise:\u003c\/strong\u003e Less than -100dBv at max volume (103)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e 122dB (AES17)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCrosstalk:\u003c\/strong\u003e -105dB\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGain: \u003c\/strong\u003eMain output: 18.5dB balanced output.\u003cbr\u003e(12.5dB SE output.)  Record output: 0dB (Processor input: 0dB balanced out).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Impedance: \u003c\/strong\u003e100K ohms Balanced, 50K ohms SE.\u003cbr\u003e8 Inputs – 4 balanced, 4 single-ended.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 600 ohms Balanced, 300 ohms SE Main (2), 20K ohms minimum load and 2000pF maximum capacitance. 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The elegant chassis maintains Audio Research’s signature aesthetic, while a new touchscreen display adds customizable input naming, brightness, color options and other controls. 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Their sleek aluminum chassis modernizes classic Audio Research styling with custom heat sinks and hidden fasteners. The S-200 also includes ARC-style power output meters inspired by the brand’s Ghost Meter aesthetic. 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Using four KT120 tubes and the Reference 75 output transformer it delivers 70 watts per channel with powerful dynamics, detail and control. Features include auto-bias, a 75-step volume control, balanced and single-ended inputs, headphone output driven by the output tubes and optional DAC and phono modules. The DAC supports USB, optical, coaxial and Bluetooth inputs with high-resolution upsampling. 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Additional features include tube hour tracking, auto shutdown and menu-based controls. Continuing Audio Research’s long-standing commitment to “High Definition” sound, the PH9 offers engaging, dynamic vinyl reproduction, strong value and dependable long-term support for serious music listeners.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e ±.2 dB of RIAA, 5 Hz to 20kHz; 1 dB points below 0.3Hz and above 80 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDistortion:\u003c\/strong\u003e Less than .015% at 3V RMS 1kHz output\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGain: \u003c\/strong\u003e58 dB at 1 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e Selectable loads: 47k, 1000, 500, 200, 100 Ohms\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 200 ohms. 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