phusis,
My speakers are 99 db/w efficient. The midrange compression driver has considerably higher efficiency, which is why I have an L-Pad to reduce its output to match that of the woofers. I really like the sound of the 713b driver.
My local dealer, Deja Vu Audio (Northern Virginia), builds custom systems around such vintage drivers as the 713b. Recently, they reconditioned two 713b drivers (attached to 32 horns) and put them into a cabinet which is a clone of the Western Electric 753 cabinet. They installed woofers that are suppose to be clones of the Jensen drivers used in the original 753 speaker. Because the 713b does not go as high as the 713a driver used in original 753s, a horn tweeter was added, which makes it not quite a clone of the original design. This speaker was installed into a wall unit, so in that sense, it was very much a "bookshelf" system. This is a terrific compact system--dynamic, clear, harmonically rich and musical sounding system. It is right up there with another compact system built by Deja Vu that employed a Jensen M-10 fieldcoil driver and a tweeter.
My speakers are 99 db/w efficient. The midrange compression driver has considerably higher efficiency, which is why I have an L-Pad to reduce its output to match that of the woofers. I really like the sound of the 713b driver.
My local dealer, Deja Vu Audio (Northern Virginia), builds custom systems around such vintage drivers as the 713b. Recently, they reconditioned two 713b drivers (attached to 32 horns) and put them into a cabinet which is a clone of the Western Electric 753 cabinet. They installed woofers that are suppose to be clones of the Jensen drivers used in the original 753 speaker. Because the 713b does not go as high as the 713a driver used in original 753s, a horn tweeter was added, which makes it not quite a clone of the original design. This speaker was installed into a wall unit, so in that sense, it was very much a "bookshelf" system. This is a terrific compact system--dynamic, clear, harmonically rich and musical sounding system. It is right up there with another compact system built by Deja Vu that employed a Jensen M-10 fieldcoil driver and a tweeter.