Quote Originally Posted by EFE Speakers
Front Tweeter hole is 3 5/16" in diameter.
If you opt to countersink the tweeter, cut 1/8" deep x 4 1/8" Dia.
The magnet diameter of the PEERLESS 812687 1" DOME TWEETER is 72mm (scroll down a bit), which is roughly 2 7/8", so why is the hole diameter 3 5/16"? Am I missing something? (The countersink diameter of 4 1/8" is the same as the "overall diameter" given on the Parts Express page (first link above).)

Quote Originally Posted by EFE Speakers
Front tweeter hole is also centered widthwise and also 3" from top of cabinet to center of hole.
Front woofer is centered 4 1/4" from bottom of cabinet.
Are these measurements from the exterior or the interior? Is the distance between the centers precisely 13 - 3 - 4 1/4 = 5 3/4"?

Three more questions: (1) Is there any value in making the front panel (the baffle?) out of HDF, or 1" MDF, or even 1" HDF? (2) Is the front panel supposed to be detachable? Or does one work though the speaker holes, in construction and repair? (3) Would not having a grill degrade sound quality?

Many thanks. I'd be happy to write up people's answers should an FAQ ever get started. ---Peter