Help chosing drivers for future DIY speakers

[Wodgy]

Quote:

Originally Posted by Pibborando /img/forum/go_quote.gif Also, those avalons are sick! I was thinking about doing angled corners like that but thought that would make the construction much more difficult. Anyone know how hard that would be?

That kind of bevel requires more advanced carpentry skills. You laminate together multiple pieces of MDF and then build a jig so you can cut away at an angle (either that or you need access to a compound miter saw). Here's a photo showing how this kind of front baffle looks in the raw:

You can see a whole series of construction pictures in this thread:
http://www.htguide.com/forum/showthread.php4?t=3430
(The carpentry pictures start on page 3.)

 

[Pibborando]

Thanks Wodgy. I came up with a new design, see here. edit: I don't have CAD

The front baffle would be 4" thick and the volume of the bottom box almost 2 cu. ft. Like that project you posted Wodgy, I think maybe a bottom firing port would be cool. Can someone explain how a port is "tuned" to a certain freqency?

I think if I do start this project some time, starting with the top box as it's own speaker and then adding the bottom one later would be best. The idea of having the lower woofer be active is interesting, but I don't think there are any sub amps that let you cross over at up to 500Hz are there?

 

[Pibborando]

Modified the design a bit to make the top box a bit shallower. Maybe the extra angle at the top back of the lower box will control reverberations better? Eh, I think it looks cool anyway. Put the speaker next to a model of a human, I did for a video game project, for size reference (about 5'10"). They're pretty compact.

See here

 

[Pibborando]

Been getting feedback from the guys at HTGuide and there's a lot of factors to consider that I didn't even know about before. I've learned quite a bit. Downloaded WinISD to calculate the port tuning and dimentions and help get the right volume for my cabinet. Here's what I've got so far:

IMAGE

Designed to use the Peerless HDS tweeter, Peerless Exclusive 5.5" mid and Dayton Reference 8" woofer. Maybe I'll actually attempt this some time.

 

[velogreg]

Also per what steve said, I would recommend that you design the speakers with external crossovers or at least easily accessible cross overs. That way, and you most assuredly will need to, you can tweak the crossover parts to get the sound to a most pleasing level. Good luck and let us know how it comes out.