2021年1月27日 · For the first time, an international team of researchers has visualized the light-sensitive protein archaerhodopsin-3 (AR3) at unprecedented resolution using the I24 and B23 beamlines at Diamond...

Archaeorhodopsin-3（AR3）是一种来源于古菌（Archaea）Halorubrum sodomense的光驱动质子泵。AR3属于视紫红质（rhodopsin）家族，这一类蛋白质在光的激发下会引发一系列生理反应。

2019年4月8日 · Archaerhodopsin-3 (AR3) 是七螺旋跨膜蛋白的微生物视紫质家族的成员，含有共价结合的全反式视黄醛分子作为发色团。 它在太阳光谱的可见光区（λmax 556 nm）显示吸收带，并在古菌 Halorubrum sodomense 中用作光驱动质子泵。

2020年7月10日 · Using this forum I learnt more about this process, what it meant had happened to the inside of the speakers and decided I would buy them. I secretly hoped I would end up with AR3s but I wasn't worried if they had to stay as AR3a. Here is a pic of them the day I bought them: These pictures actually don’t do justice to how much work was required.

2016年4月20日 · Send pictures of your AR-3 installations and give a description of the sound! AR-3 lacquered-mahogany mounted in office bookshelf with AR-3a (oiled-walnut finish) below. Note the satin luster (not a high-gloss luster) of the lacquered-mahogany finish, sort of a …

2004年9月29日 · Photos of the AR3 and AR3a tweeters and midrange drivers are shown. The original tweeters and midrange units have massive magnets that are about four times the size of the later AR3a's. From the article:

2024年12月4日 · I have a pair of AR3 speakers that I can not figure out what is going on. Here is what is happening. I replaced and rewired both speakers with pictures I...

AR3 Speaker-P Acoustic Research Inc.; Cambridge, MA, build 1963/1964, 6 pictures, United States of America , schematics, tubes, semiconductors, Loudspeaker

2005年12月27日 · AR3's are "bookshelf" speakers. And Classics of the first order. You have discovered a Hi-Fi product, that are among the finest transducers ever produced. Not perfect, but so good at so much, some call them the best of their breed. In Acoustic Suspension speakers, the AR 3 is about as good as they come.

2014年3月10日 · Here is a pic of my AR-2a's with some real retro grilles with gold threads. btw--I'm not using these in my vintage setup right now (AR-3a's are in there) but I really like the 2a. Maybe even more than the 2ax.