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Forum topic by CiscoKid posted 10-20-2010 08:01 PM 1292 views 1 time favorited 4 replies Add to Favorites Watch
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CiscoKid

317 posts in 1529 days


10-20-2010 08:01 PM

Topic tags/keywords: question

Hate to be a bother, but where can one go for 1” MDF? All the big box stores stock is 3/4”. Speaker builders use a lot of 1” MDF and I am looking to build a pair of transmission towers. Shipping is out of the question since these sheets will be very heavy. I need to be able to go get it myself with my truck.

Thanks in advance!

-- Al, Culpeper VA


4 replies so far

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bunkie

411 posts in 1803 days


#1 posted 10-20-2010 08:35 PM

Don’t bother with 1”, i find that it isn’t necessary. 3/4” is just fine. I’ve built three sets of transmission-line towers using 3/4” MDF and I’m more than pleased with the result.

BTW, what woofers are you using? If you’re interested, I have detailed plans and construction photos on my website:

Www.audio.thesonicboomers.com

Transmission lines are seriously cool. The natural quality of the bass will spoil you.

-- Altruism is, ultimately, self-serving

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CiscoKid

317 posts in 1529 days


#2 posted 10-20-2010 09:53 PM

I am using a pair of Seas W18E-001 and a Seas T25CF002 Millennium tweeter in each tower. This is the THOR kit designed by D’Appolito. I purchased the crossovers, drivers, and dampening material already – I just need to (carefully) build the enclosures. It was all I could do to get the box containing the dampening material in the house. Must have weighed at least 140 pounds. I checked out your website and your transmission line design is very similar to what I will be building. You sure 3/4” is enough? My plans call for 1”. This is going to be my winter project. Thanks for your reply – I will check your website out in greater detail when I have more time.

-- Al, Culpeper VA

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jusfine

2280 posts in 1582 days


#3 posted 10-20-2010 11:48 PM

Al, most of the millwork shops will have access to 1” material.

It is quite common in this area, but not at the retail outlets as you mentioned.

Call a wholesaler for sheet goods, sometimes you get lucky and they just give you one.
I have bought the 1” material in 5’ x 10’ sheets, so very heavy to handle.

-- Randy "You are judged as much by the questions you ask as the answers you give..."

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bunkie

411 posts in 1803 days


#4 posted 10-21-2010 02:19 PM

One other thought is to use 1/2” MDF and laminate it.

BTW, the Thor’s look very impressive. I remember when the construction article for them showed up in AudioXpress a couple of years back.I’‘m sure you will be very satisfied with them. SEAS makes some very nice drivers. I got the TL bug from a co-worker about 10 years back. He had bought some very nice 10” SEAS woofers and had plans to build a set of TLs out of them, that got me thinking and I did some research on quarter-wave transmission lines and discovered that the design was a good fit for my favorite Vifa 6” woofers (now discontinued, sadly).

I’ve never had a chance to audition any of the D’Appolito MTM-layout systems. One day, I’ll build a pair to get my chance.

-- Altruism is, ultimately, self-serving

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