{"product_id":"audible-illusions-modulus-3a-tube-preamp-w-phono","title":"Audible Illusions Modulus 3A Tube Preamp w\/Phono Stage","description":"\u003cp\u003eHere we have a great sounding preamplifier, the Audible Illusions Modulus 3A all tube preamp with a fine phono section. The unit is in perfect working order. Physically the unit has some fading\/bleaching on the anodized aluminum cover, and there are some small blemishes, nicks and scratches on the unit and power supply. There are no dents, dings or deep scratches on the unit, and the faceplate is in very good condition. The unit as a whole presents itself very well. Please refer to the many pictures in the listing for further details. \u003c\/p\u003e\n\u003cp\u003eThe unit came to us from an old audiophile and it had not been used for some time. Under the hood, the unit was very clean, with no signs of bulging capacitors or heat stressed resistors. Mil spec parts are used in these preamps, and the boards themselves are beautifully made. The build quality on the unit is exceptional. We first tested the tubes, of which all but one were still useable. We retubed the phono section with a set of Tungsol 6DJ8 tubes made in Hungary, and we installed RAM Sovtek 6922' in the linestage section. (RAM tubes are from \u003cmeta charset=\"utf-8\"\u003eRoger A. Modjeski). We went through a few sets of tubes to find ones that were quiet, and we are very pleased with the results. \u003c\/p\u003e\n\u003cp\u003eThis is a highly regarded and well reviewed preamp and it sounds wonderful. \u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eWe don't have the original box for this unit, but we take packaging and shipping seriously. Our boxes meet or exceed OEM packaging. We spare no expense, use heavy duty boxes, and polyethylene foam when boxing up our gear for transit.\u003c\/p\u003e\n\u003cp\u003eSpecifications:\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003ePhono section gain: 28dB at 1kHz (MM), 27dB (MC). Line section gain: 30dB. Output impedance: 1.2k ohms (main), 150 ohms (tape). Input impedance: 47k ohms. Frequency response: 2Hz-100kHz within 1dB, measured with a 1:1 probe\/100k ohm load. Phono section RIAA error: 20Hz-20kHz ±0.25dB. Distortion: 0.02% (MC phono section); ±0.015% at 20kHz (MM phono section); ±0.15% at 1.5V RMS out, 20Hz-20kHz into 50k ohms, ±0.12% at 500mV RMS out, 20Hz-20kHz, into IHF load (high-level section). S\/N ratio: 74dB ref. 5mV wideband input (MM phono section); 85dB ref. 1.5V RMS wideband input (high-level section).\u003cbr\u003eDimensions: 17\" W by 3\" H by 10\" D (preamplifier); 5\" W by 5 ½\" H by 10\" D (power supply).\u003c\/p\u003e","brand":"Audible Illusions","offers":[{"title":"Default Title","offer_id":67733125955689,"sku":"001876","price":1495.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0267\/5212\/2985\/files\/9B2634CF-CCA6-4246-8D6F-5B6E3F55112D_1_201_a.heic?v=1792525534","url":"https:\/\/recordmarthifi.com\/products\/audible-illusions-modulus-3a-tube-preamp-w-phono","provider":"Record Mart HiFi","version":"1.0","type":"link"}