{"product_id":"audio-research-ls28se-line-stage-pre-amplifier","title":"Audio Research LS28SE Line Stage Pre Amplifier","description":"\u003cp\u003eThe LS28SE line stage is a flexible and intuitive preamplifier. Four balanced and four single-ended inputs, and two sets of both balanced and single-ended outputs, allow maximum connectivity. The straightforward menu allows control of numerous parameters, including input naming, tube hours, auto shutdown, and home theater passthrough. Phase invert and mono are also standard functions. At the heart of the LS28SE are four 6H30 vacuum tubes in the analog circuit. While the LS28SE is the perfect match for any Audio Research amplifier, it has been designed to work with nearly any amplifier on the market today.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0225\/9777\/files\/Audio-Research-LS28SE-Stereo-preamplifier-wide.jpg?v=1658271115\" alt=\"AUDIO RESEARCH LS28SE LINE STAGE PRE AMPLIFIER\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe improvements in the LS28SE stem from what was learned during the creation of Audio Research’s Reference 160-series amplifiers. Very similar to the wire and parts changes incorporated in the REF6SE and REF PH3SE, the LS28SE also includes upgrading to the same proprietary gold coupling caps used in the REF6SE. These numerous and costly component upgrades elevate the LS28SE’s performance to an entirely new level. The improved clarity, resolution, transient snap, sense of space, and a relaxed purity are instantly noticeable and will inspire extended listening sessions.\u003c\/p\u003e\n\u003cp\u003eSince 1970, High Definition has been more than a trademark; it has been Audio Research's guiding principle for all products. The Foundation Series continues this passion and philosophy, offering the listener stunning playback, great value, and unparalleled long-term support.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/parttimeaudiophile.com\/2022\/04\/03\/audio-research-ls28se-linestage-review\/\" title=\"Audio Research LS28SE Preamplifier\" rel=\"noopener noreferrer\" target=\"_blank\"\u003e\u003cimg alt=\"Audio Research LS28SE Preamplifier\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0225\/9777\/files\/Audio-Research-LS28SE-quote.jpg?v=1658273091\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv style=\"display: block;\" class=\"prodottoTesto\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eFREQUENCY RESPONSE +0-3dB, 0.4Hz to 200kHz at rated output\u003c\/li\u003e\n\u003cli\u003e(Balanced, 200k ohms load)\u003c\/li\u003e\n\u003cli\u003eTHD+NOISE Less than .007% at 2V RMS BAL output.\u003c\/li\u003e\n\u003cli\u003eNOISE Less than -100dBv at max volume (103).\u003c\/li\u003e\n\u003cli\u003eDYNAMIC RANGE 122dB (AES17).\u003c\/li\u003e\n\u003cli\u003eCROSSTALK -105dB\u003c\/li\u003e\n\u003cli\u003eGAIN Main output: 18.5dB balanced output. (12.5dB SE output.)\u003c\/li\u003e\n\u003cli\u003eRecord output: 0dB (Processor input: 0dB balanced out).\u003c\/li\u003e\n\u003cli\u003eINPUT IMPEDANCE 100K ohms Balanced, 50K ohms\u003c\/li\u003e\n\u003cli\u003eSE. 8 Inputs - 4 balanced, 4 single-ended.\u003c\/li\u003e\n\u003cli\u003eOUTPUT IMPEDANCE 600 ohms\u003c\/li\u003e\n\u003cli\u003eBalanced, 300 ohms SE Main (2), 20K ohms minimum load and 2000pF maximum capacitance.\u003c\/li\u003e\n\u003cli\u003eOUTPUT POLARITY Non-inverting.\u003c\/li\u003e\n\u003cli\u003eMAXIMUM INPUT 16V RMS BAL, 8V RMS SE.\u003c\/li\u003e\n\u003cli\u003eRATED OUTPUTS 2V RMS (1V RMS SE) 1Hz to 200kHz into 200K ohm balanced load (maximum balanced output capability is 17V RMS at less than 0.5% THD at 1kHz).\u003c\/li\u003e\n\u003cli\u003eCONTROLS Rotary volume selector (103 steps) and rotary input selector.\u003c\/li\u003e\n\u003cli\u003ePush buttons: Power, Menu, Enter, Mono, Invert, Mute\u003c\/li\u003e\n\u003cli\u003ePOWER SUPPLIES Electronically regulated low and high voltage supplies.\u003c\/li\u003e\n\u003cli\u003eAutomatic 45 sec. warm-up\/brown-out mute.\u003c\/li\u003e\n\u003cli\u003eLine regulation better than .01%.\u003c\/li\u003e\n\u003cli\u003eTUBE COMPLEMENT (4) 6H30P dual triode.\u003c\/li\u003e\n\u003cli\u003ePOWER REQUIREMENTS 200-250VAC 50\/60Hz) 130 watts maximum.\u003c\/li\u003e\n\u003cli\u003eSTANDBY 2W\u003c\/li\u003e\n\u003cli\u003eDIMENSIONS (HxWxD) 48 x 13.7 x 34.8cm\u003c\/li\u003e\n\u003cli\u003eWeight 7.2kg (10.9kg shipping)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eReviews\u003c\/h1\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003ca title=\"Audio Research DAC9 Tube DAC\" href=\"http:\/\/www.tonepublications.com\/MAGPDF\/TA_084.pdf\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0225\/9777\/files\/Tone-logo2.jpg?v=1626129599\" alt=\"Audio Research DAC9 Tube DAC\" style=\"margin-top: 10px; margin-right: 10px; float: left;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cp\u003eHere’s the bottom line, and I’m giving the punch line away early in the review. After living with the Foundation series for a few months now, they all deliver top of class performance, and each offers exceptional value, judged alone.\u003ca href=\"http:\/\/www.tonepublications.com\/MAGPDF\/TA_084.pdf\" target=\"_blank\"\u003e \u003c\/a\u003e\u003ca title=\"Audio Research DAC9 Tube DAC\" href=\"http:\/\/www.tonepublications.com\/MAGPDF\/TA_084.pdf\" target=\"_blank\"\u003e\u003cb\u003emore...\u003c\/b\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003ca href=\"https:\/\/parttimeaudiophile.com\/2022\/04\/03\/audio-research-ls28se-linestage-review\/\" title=\"Audio Research LS28SE Preamplifier | REVIEW\" target=\"_blank\"\u003e\u003cimg style=\"margin-top: 10px; margin-right: 10px; float: left;\" alt=\"Audio Research LS28SE Preamplifier | REVIEW\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0225\/9777\/files\/Part-time-audiophile-logo_9bd199e1-6676-4ed0-aa09-d4892fc28432.jpg?v=1658271961\"\u003e\u003c\/a\u003e\u003c\/div\u003e\n\u003cp\u003eIf you’re ready to hear what a truly high-end line stage can do, the Audio Research LS28SE is one of those rare preamps that will truthfully elevate the sound of your system. \u003ca href=\"https:\/\/parttimeaudiophile.com\/2022\/04\/03\/audio-research-ls28se-linestage-review\/\" title=\"Audio Research LS28SE Preamplifier | REVIEW\" target=\"_blank\"\u003e\u003cstrong\u003emore...\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Audio Research","offers":[{"title":"Default Title","offer_id":32553690366034,"sku":"ARCLS28SE","price":24000.0,"currency_code":"NZD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0225\/9777\/products\/Audio-Research-LS28SE-Line-Stage-Pre-Amplifier-front-angle.jpg?v=1655850936","url":"https:\/\/soundline.co.nz\/en-int\/products\/audio-research-ls28se-line-stage-pre-amplifier","provider":"Soundline Audio Online NZ","version":"1.0","type":"link"}