A/V-1+
A/V-1
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A/V-1+ |
A/V-1 |
The A/V-1+ kit from GR Research consists of two model M-130,
5 ¼" drivers and one model GR T1, 1" tweeter. Also
included in the
kit were: All crossover parts (including foil inductors), terminal
cup,
flared vent tube, driver mounting screws, solder and hook up wire.
The A/V-1 kit includes one M-130 driver and one GR T1 tweeter,
and all parts (as listed above) needed to make one speaker.
Three A/V-1+ kits were purchased, one with shielded drivers for
the center channel. Three A/V-1 kits were purchased for left,
center and right surround speakers.
The crossover boards were constructed on ¼" Masonite peg board,
with separate boards for high and low pass sections. Note:
Board for the A/V-1 low pass has the two inductors mounted
at right angles to each other to minimize interaction.
Shown are two boards (high and low pass) for the A/V-1+ and
two boards (high and low pass) for the A/V-1.
The basic box made from ¾" MDF with internal dividers/braces. |
Front and rear panels have been added, and holes for mid/woofers cut. |
½" MDF has been added to the front panel, leaving a ½" X ½" groove on the edges. |
¼" oak plywood has been installed on all sides, leaving a ¾" X ¾" groove on the front edges, where ¾" quarter-round moldings have been installed. |
Cabinet has been finished and "egg crate" foam installed on the inside. Driver holes have been routed. |
Rear view of the cabinet showing the input terminal and vent holes. All edges except the front, have been routed to accept 3/8" X 3/8" quarter-round, solid oak moldings. |
The three A/V-1+ speaker cabinets with all the components installed.
The resulting cabinets are 8½" wide, 18" high, 15½"
deep,
and 1" thick, except for the front, which is 1½" thick.
The basic box made from ¾" MDF showing divider/brace. |
Front and rear panels have been added, and mid/woofer hole has been cut. |
½" MDF has been added to the front panel, leaving a ½" X ½" groove to be filled by oak moldings. |
Cabinet has been covered by ¼" oak plywood and the resulting groove around the front has been filled by ¾" oak quarter-round moldings, and driver holes have been routed. |
"Egg crate" foam has been added to the inside of the cabinet, and the cabinet finished. |
Rear view of the cabinet showing the 3/8" X 3/8" quarter-round moldings installed on all edges (but the front). |
The three A/V-1 cabinets with all the components installed.
The resulting cabinets are 8½" wide, 12¼" high, 12¼"
deep, and
1" thick, except for the front, which is 1½" thick.
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Obtained 1/8", 2" square tubing, cut two pieces 25" long, welded a 6" X 6", 3/16" steel plate to one end to install the speaker. Welded inside the other end, two steel cylinders, drilled and tapped for ¼/20 cap screws to attach the tube to the base. |
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Cut two pieces of ¾" plywood in the shape shown
at left. Covered them on both sides with
¼" oak plywood and added solid oak moldings on the sides. Installed "Big Toe Jr's", spikes obtained from North Creek Music: http://www.northcreekmusic.com/ |
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Completed stands are shown at left, ready to attach to the speakers. |
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Speaker installed on the stand. The wood base
is easily removable to fill the metal tube with sand, lead shot, etc. Total cost to make a pair of stands: $10.00, for spray paint and oak moldings. All metal and wood were scraps. The owner bought the spikes @ $8.00 per set of four,
From North Creek.
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