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PostPosted: December 29th, 2018, 5:55 pm 
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Location: Parkville, Maryland
brombo wrote:
For sealed boxes there is this. Don't know of relevance to vented enclosures.

http://bgavinsound.com/Reference/Speake ... hermal.txt


In my case -- the vented Altecs -- before I got into dialing in the box -- sounded "fat and warm." RTA measurements showed a bump in the mid bass and a roll-off below 45-Hz. I set about creating what I call "a half-ass transmission line." Using an amalgam of different materials (wool, fiberglass fill, rigid fiberglass baffles, and course poly Dacron) I ended up with an exceptionally neutral mid-range and bass flat to 31-Hz.

It was not an overnight event. Not by a long shot. But keeping the faith and good use of spare time I got there.

The woofer ended up "seeing" an anechoic void and the long resistive path created with the rigid baffle to the double vents helped smooth out the bass and extend it.

I've done the same thing to other speakers in my evil past with similar results.

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PostPosted: December 30th, 2018, 11:48 am 
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Nice looking boards, Tom. Thanks for the heads up.

Steve, do you have the screws etc. to mount the speakers? For the crossovers, Home Depot and Lowes sell nylon standoffs in those big parts drawers. Whenever I'm in the store, I grab a bunch of sizes. They always come in handy.

Please post progress pics, and don't stop asking build questions. Happy to help.

Trial and error is the hobby. The reward is great when you find the magic mix.

Good luck.

Stuart


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PostPosted: December 30th, 2018, 1:35 pm 
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If you have time, you can also get any type or size on ebay. I usually get mine there. I just searched for nylon spacers there and got almost 32,000 hits. You can search for them by size which would reduce the returns by a lot.

https://www.ebay.com/sch/i.html?_from=R ... s&_sacat=0


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PostPosted: December 30th, 2018, 1:43 pm 
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This is something someone should have recommended before I placed my order. Now, I have to order again (and pay shipping) to get breadboards.

Then, it will not come with those wire tabs, I will ask, and someone will point something else to order.

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I reject your music, and substitute my own.


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PostPosted: December 30th, 2018, 2:39 pm 
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mix4fix wrote:
This is something someone should have recommended before I placed my order. Now, I have to order again (and pay shipping) to get breadboards.

Then, it will not come with those wire tabs, I will ask, and someone will point something else to order.


I can spare brass standoffs, let me know what you need.

A friendly note. Fellow hobbyists are trying help you here. It is not their responsibility to figure out what all you need, nor they have enough information to determine. Ultimately, this is your project and you have to drive it.


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PostPosted: December 30th, 2018, 4:56 pm 
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mix4fix wrote:
This is something someone should have recommended before I placed my order. Now, I have to order again (and pay shipping) to get breadboards.

Then, it will not come with those wire tabs, I will ask, and someone will point something else to order.


You could go old school with turret terminal boards. You can easily cut them to the length needed.

https://www.ebay.com/itm/Forked-Turret- ... rk:14:pf:0

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PostPosted: December 30th, 2018, 7:50 pm 
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Location: Baltimore MD
You do not need that stuff
There many speaker that just glue components down on a piece of hardboard and wire the components to each other.
You guys are just making this so difficult and confusing by trying to show off.


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PostPosted: December 30th, 2018, 8:07 pm 
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I was definitely not trying to show off. Making a helpful suggestion.

Here is another. If the cabinets are not as smooth and finely finished as you might like, you can buy "Stone Finish" spray paint from your local hardware store. Kind of expensive at $8-$9 per can. But it covers defects nicely and easily.

Apply a sealer first, though.

Of course you could look on ebay.....


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PostPosted: December 30th, 2018, 8:15 pm 
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Pelliott321 wrote:
You do not need that stuff
There many speaker that just glue components down on a piece of hardboard and wire the components to each other.
You guys are just making this so difficult and confusing by trying to show off.


Gluing components to hardboard makes it hard to experiment. A better choice might be using tag strips similar to what Walt suggested. Screw them to the cabinet directly.

Here is another idea for consideration, bring the individual driver conductors through the rear of the cabinet. Mount the crossover on the rear of the speaker, or sit it on top. Once you are done experimenting, then you can make it permanent however best suits you.


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PostPosted: December 30th, 2018, 9:48 pm 
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I think one of the best things you can learn in a DIY project is good construction techniques. Yes you can hot glue stuff together and tack solder components. What you find out in the long run is that those techniques are not reliable. When soldering, the joint should first be mechanically good with the solder just filling in the connection and helping to prevent oxidation. Gluing components together will work but as Stuart said changing components will be more difficult. With my crossovers I have found that running the leads through the board to connect on the bottom side adds structural strength. With larger components like large film capacitors I also put hot glue under them as well. For air core chokes I use tie wraps through the board to provide mechanical stability. If you need to change something they are easy to cut. For large chokes with mounting holes I use screws and nuts to fasten them to the board. You can get by with the basics but I have found that every step to insure good mechanical connections as well as electrical connections pays off in the long term.


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