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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.

Post Subject: Sliding it inPosted by jessie.dazzle on: 9/13/2010

Here's how I would do it:

The day before:

Reserve two lifts and get two pieces of old carpet (about one square yard each) and two bottles of champagne. Insist that everyone involved gets a good night of sleep before attempting to install the horns (three guys is ideal).

The big day:

Move one horn out of the way and position the other on the floor, in front of its hole, so the throat is lined up with the vertical plane of the wall with the holes, leaving about 1" clearance between the rear of the horn and the plane of the wall.

Place the old carpet face down on the forks of both lifts.

Raise the horn using one lift at the mouth facing into the horn, and one lift off to the side at the throat.

Once the throat is above the attic floor, using a come-a-long, pull it back until the throat is past the edge of the attic floor (the carpet will allow the horn to slide on the metal forks without causing them to fall; if it does not slide, as is likely in the case of the rear lift, the lift will tilt the small amount necessary to allow 1" movement without falling).

Lower the throat so it rests on the attic floor.

Use the free lift to support the horn from the heavy side, as close to the mouth as possible, but without touching the forks of the first lift.

Use come-a-long to continue pulling the horn into place one inch at a time, adjusting the lifts with every inch of movement, alternately loading one lift to liberate and reposition the other.

Continue the process untill the mouth is flush with the wall (you will likely have to attach the come-a-long somewhere near the middle of the horn for the last two feet of movement).

Start thinking how the champagne will taste, but leave it in the cooler.

Repeat process for second horn.

Uncork the champagne.

You will likely damage the lower edge of the hole in the wall, but that can be repaired when finishing off the installation.

Don't forget to pause for photos!

jd*

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