After a long time I got the A7's painted and back together and they sound good. Well worth the all the work. After removing the front horn mounts I had gray paint to take to the paint store. Anyone know of plans for wings?
After a long time I got the A7's painted and back together and they sound good. Well worth the all the work. After removing the front horn mounts I had gray paint to take to the paint store. Anyone know of plans for wings?
None I'm aware of, but the originals are simple enough. Each are cab height 3/4" plywood [no void preferred in HIFI/HT apps] and 10" wide framed with 2x2s with a single brace across the middle, though back then they really were 2x2s, so I recommend 2x3s. There were no triangulating braces like on the larger 210s because they were designed to be tied together with a pair of top baffles, so I recommend adding them plus using two cross braces.
800 VOTT
LOW FREQUENCY HORNS
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
what kind of results can I expect?
Depends on the local boundary conditions as to how much they help with bass loading, so for all but the largest rooms or outdoors, you primarily want them to smooth out and extend the horn's response ~ a half octave since it's a much truncated 55 Hz flare frequency. Ideally you want to use the top baffles also as they will still audibly help even if there's a gasket-ed cutout for the HF horn.Originally Posted by badtoby
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
Thanks GM for the reply. Does that mean I would have to move the horn forward and if I did would that create a time alignment problem? Truncated, had to look that one up
FWIW I'm betting you'll like the bass more the way you have them as opposed to smaller ports. That orange was god awful!!! I bet they rocked pretty good with the ol Marantz. Those have pretty good bass.
You're welcome! Why would you move the horn? As I noted you will need to make a gasket to blend the horn to the cutout. High density open cell foam is preferred. Don't know if it's still available, but I use to buy trail pad at The Foam Store to make horn extensions to quell mouth reflections back to the throat and off nearby boundaries. Basically, a much larger, deeper variant of the M19's horn foam inset, though I didn't go out of my way to make such nice, tapered cuts.
GM
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
OK I should have put them with the thread from 2 years ago which would have made sense. Probably all that lead paint dust from sanding the cabs? anyway heres the link.
http://www.hostboard.com/forums/f700...oring-a7s.html
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