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What plywood to use for box


ehall8702

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I'm goin to build a new box for my 4 sq 8s. I want to use a plywood that is strong and can be stained so it looks as good as it sounds. I have been using mdf for the last 20 years and have absolutely no idea what plywood would even work for a box. My buddy is a finish carpenter says cabinet grade plywood should work( at least for the nice looking part of it). Also is it ok to use 3/4" plywood like I do with mdf? Of course double baffled face. I can't afford some crazy exotic $h*t tho, something affordable, strong, and looks decent stained and laquered. Thanks in advance guys.

2009 Silverado 1500, 7.5" lift, 37x12.50r17s, Built Gen 4 5.3L ( 4.8l flat pistons, decked 243s, SS2 Cam, Pac 1218 springs, ported intake, 120mm TB, Long tubes, 3" duals HP tuner software tuned by me), 4l80e swapped and 4.56 gears. All done by me. stereo is Pioneer avh 600ex, all stinger rca, jp23 v1.5, skar rp150.4, and hertz hpd4. 2 SHCA 6.5 8ohm, 1 SHCA 3.5", and 1 DS18 tw120pro in each door. The 3.5 mid and 3.5" tweeters are powered by the skar rp150.4, the 6.5s are powered by the hertz bridged @4 ohms. Dual runs   of 3/0 welding cable, 300a alternator, 2 Vmax AGMs up front. current sub is a AB XR 12 ( dual 2 ohm) with bottom spider cut out in 2.25 cubes at 32hz

 

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Use MDF with wood veneer over it.  Use solid 1.5 white ash.  No plywood needed.

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2 hours ago, Gunnem said:

your buddy is a FINISH CARPENTER and you ask online lol

Yeah he has no clue what to use for a sub box tho. He builds cabinets and custom furniture not speaker boxes. I've always thought plywood resonated to much to use for a sub box anyways so I have always used mdf with carpet or bedliner. 

 

1 hour ago, Soccerballzs said:

Use MDF with wood veneer over it.  Use solid 1.5 white ash.  No plywood needed.

1.5" white Ash veneer? Regular veneer is right up his alley too just trying to make it less steps to get it built. 

And I'll look into Baltic birch that's what I was thinking before I posted because I have read it a few places.

2009 Silverado 1500, 7.5" lift, 37x12.50r17s, Built Gen 4 5.3L ( 4.8l flat pistons, decked 243s, SS2 Cam, Pac 1218 springs, ported intake, 120mm TB, Long tubes, 3" duals HP tuner software tuned by me), 4l80e swapped and 4.56 gears. All done by me. stereo is Pioneer avh 600ex, all stinger rca, jp23 v1.5, skar rp150.4, and hertz hpd4. 2 SHCA 6.5 8ohm, 1 SHCA 3.5", and 1 DS18 tw120pro in each door. The 3.5 mid and 3.5" tweeters are powered by the skar rp150.4, the 6.5s are powered by the hertz bridged @4 ohms. Dual runs   of 3/0 welding cable, 300a alternator, 2 Vmax AGMs up front. current sub is a AB XR 12 ( dual 2 ohm) with bottom spider cut out in 2.25 cubes at 32hz

 

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8 hours ago, ehall8702 said:

I've always thought plywood resonated to much to use for a sub box anyways so I have always used mdf with carpet or bedliner. 

Birch will resonate if you do not do proper bracing.

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  • 2 weeks later...

You can laminate the inside with a urethane type product and totally kill mdf in weight and rigidity for speaker applications. Theres a youtube video thats mildly scientific where a decently geeked out presentation is still interesting and explains this process quite well.  Its ‘the worlds best or second best speakers’?  Its interesting at the least... 

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I used that expensive shit from Home Depot. Worked great.

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On 8/1/2019 at 6:27 AM, Soccerballzs said:

Use MDF with wood veneer over it.  Use solid 1.5 white ash.  No plywood needed.

this gives you the most options and a super clean look. this is already what industry does and even home theatre does this.

if nothing changes, nothing changes

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