Frugel-Horn Mk3 Builds & Build Questions

[planet10]

Excellent... that is Alpair 7?

dave

[wagtail]

yes A7's, i don't really know how to describe the bass its a bit boomey, hollow,not tight.
simon

[planet10]

Sounds like you need more damping....temporarily you can pull them out from the wall. bass will still be fat but some of the boom should go away.

dave

[chrisb]

Originally Posted by planet10

Sounds like you need more damping....temporarily you can pull them out from the wall. bass will still be fat but some of the boom should go away.

dave

Particularly the left side that is tight into the corner. I can see that the door on the right side constricts placement - does the room allow for alternate placement, perhaps with some toe-in?

It's been our experience so far that the A7 needs far less horn lift in the bottom octaves than the FE126E.

[wagtail]

can't do much about placement at the moment, i'll bring them out a bit and try to pull the left one out of the corner.(actually that door is not used much hmm...)
can you explain "far less horn lift in the....." please chris?
simon

[chrisb]

Originally Posted by wagtail

can't do much about placement at the moment, i'll bring them out a bit and try to pull the left one out of the corner.(actually that door is not used much hmm...)
can you explain "far less horn lift in the....." please chris?
simon

Scott or Dave can better explain that part

[planet10]

Proximity to walls or corner change the loading and increase the apparent size of the horn (ie in free space, the mouth radiates into a sphere, put it on the floor, half sphere, push back against a wall, 1/4 sphere, into the corner 1/8 sphere)

dave

[yoaudio]

Hi,
I just picked up a sheet of 18mm Baltic birch plywood and
I have the beta document25-October-2010. I didn't see a cut
sheet diagram for the 18mm, just wondering if anyone had one.

Thanks

[wagtail]

see page 2,post 15 for 18mm front & side elevation, i had to draw my own cut sheet for the nominal 18mm (17.4 mm ply) i used
simon

[chrisb]

Originally Posted by wagtail

see page 2,post 15 for 18mm front & side elevation, i had to draw my own cut sheet for the nominal 18mm (17.4 mm ply) i used
simon

cut plan for 5x5ft Baltic birch on page 7 of

http://homepage.mac.com/tlinespeaker...Doc-251010.pdf

Note as mentioned in one of several threads, this is a very tight cut plan. I'd fabricated this pair from offcuts from other projects, so only drew this plan up after the fact. The side and front panels are laid out for maintaining grain direction if material is not to be post veneered or p-lamed.