{"id":310792,"date":"2025-10-09T11:53:27","date_gmt":"2025-10-09T09:53:27","guid":{"rendered":"https:\/\/freakuence.nl\/product\/audio-research-d-76a\/"},"modified":"2026-04-08T18:55:19","modified_gmt":"2026-04-08T16:55:19","slug":"audio-research-d-76a","status":"publish","type":"product","link":"https:\/\/dev.freakuence.nl\/en\/product\/audio-research-d-76a\/","title":{"rendered":"Audio Research D-76A"},"content":{"rendered":"
\n
Description Freakuence!<\/strong><\/span><\/div>\n
We love it! This is not just a block of audio history, this is mesmerizing withering. A gigantic soundstage and infinite layering that immerses you in a kaleidoscopic sound bath where each color flows smoothly into the other. Do sit down sir… <\/span><\/div>\n
Details<\/strong><\/span><\/div>\n
Features exceptional new old stock tubes. 4x the GeC 6550 N.O.S., measured by us 85%. Preamp tubes 95%. And by us a new KT66 stabilization tube. <\/span><\/div>\n
The amplifier has been fully measured.<\/span><\/div>\n
The electrolytics of this collector’s item are perfect, correct value and low ESR. (The unit comes from a private collection.) <\/span><\/div>\n
Our engineer has set the bias circuit to current 240\/250 felt, 220 is no longer an option with proper use. The AC and DC balance are set for optimum operation and minimum distortion. <\/span><\/div>\n
This thing is super! And count on this design putting many contemporary amp designers to shame. <\/span><\/div>\n
Do not lift by levers.<\/span><\/div>\n
General description<\/strong><\/span><\/div>\n
The Audio Research D-76A is a tube amplifier known for its warm and musical sound reproduction. With a power output of 75 watts per channel, this amplifier provides enough power for most speakers. The D-76A is equipped with a balanced output, which contributes to its high sound quality. This means that the 4-ohm connections act as common or grounded connections, as opposed to the more conventional “0” or “C” connections. This design provides better signal transmission and less interference.<\/span><\/div>\n
The amplifier features 17 tubes: five 6550s (four of which are for power supply and one for bias control), eight 6CG\/FQ7s (drivers) and four 12AX7s (phase splitters). This configuration contributes to the D-76A’s distinctive sound.<\/span><\/div>\n
The D-76A is designed with a balanced output, which contributes to its high sound quality. This means that the 4-ohm connections act as common or grounded connections, as opposed to the more conventional “0” or “C” connections. This design provides better signal transmission and less interference.<\/span><\/div>\n
Weighing over 23 kilograms and with a robust build quality, the D-76A is a solid addition to any audio setup. The amplifier is suitable for both stereo and mono use, with an 8-ohm load recommended in the mono configuration.<\/span><\/div>\n
The D-76A is an amplifier that embodies the essence of tube sound and offers a rich, detailed listening experience.<\/span><\/div>\n
Background information<\/strong><\/span><\/div>\n
The Audio Research D-76A is a tube amplifier from the 1970s designed by William Z. Johnson, founder of Audio Research. The D-76A reflects his philosophy: combining tube technology with modern performance. The amplifier uses high-quality components such as precision resistors and selected vacuum tubes. Internally, it is hand-wired point-to-point for optimal signal integrity. The metal housing is solidly and functionally designed for heat dissipation and vibration damping. <\/span><\/div>\n
Brand history<\/strong><\/span><\/div>\n
Audio Research was founded in 1970 in Minneapolis, Minnesota, United States, by William Zane Johnson. The company began developing electronic tube equipment, starting with the SP-1 preamplifier. Over the years, the brand introduced several products, including the D-150 power amplifier in 1974 and the original REF1 in 1995. Audio Research moved its headquarters to Maple Grove, Minnesota, in 2007. In 2020, the company was acquired by AR Tube Audio Corporation, led by former employees. Audio Research manufactures all of its products in the United States and focuses on manual assembly of equipment. Repairs and maintenance can be done in-house. The company uses hand-wired point-to-point wiring combined with printed circuit boards. Documentation and schematics of products since 1970 are available through the company, and parts are kept in its own warehouse. <\/span><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Description Freakuence! We love it! This is not just a block of audio history, this is mesmerizing withering. A gigantic soundstage and infinite layering that immerses you in a kaleidoscopic sound bath where each color flows smoothly into the other. Do sit down sir… Details Features exceptional new old stock tubes. 4x the GeC 6550 […]<\/p>\n","protected":false},"featured_media":384488,"template":"","meta":{"_acf_changed":false,"inline_featured_image":false},"product_brand":[],"product_cat":[492,743,505],"product_tag":[487],"class_list":{"0":"post-310792","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-amplifiers","7":"product_cat-stereo-amplifiers","8":"product_cat-tube-amplifiers","9":"product_tag-used-en","10":"pa_kleur-gold","12":"first","13":"instock","14":"sold-individually","15":"purchasable","16":"product-type-simple"},"acf":[],"yoast_head":"\nAudio Research D-76A | Freakuence!<\/title>\n<meta name=\"description\" content=\"Audio Research D-76A tube amplifier with warm sound and powerful performance. \u2713 New & Used HiFi \u2713 Customer rating: 4.9 out of 5 \u2713 Trade-in \u2713 Listening session\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, 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