AbC box done with subs(pics)

[dbhittin 5,000+ posts]

I always wanted to try these subs out, and let me tell u, they slam and sound awsome. I put them in my hatch to test and the box was a little big for the hatch and my motor is done, so i put them in our explorer and its the best sounding subs ive heard. So, they will probly end up in the audi if they fit. The box is 4cubes, ignore the brownish paint, the lid was black, but it came out brown. so i will get more pics when i get everything in the audi.

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[js1 10+ year member]

Nice box. I was looking into them, but a little too big for my space.

Have you heard those 2 subs in a different box to compare?

-js1

 

[Bavarian3 10+ year member]

awesome....any internal pics of the box from when u were putting it together?

 

[DBfan187 5,000+ posts]

Looks pretty.

 

[btnhfan 5,000+ posts]

can someone explain an abc box to me? my friend was trying to explain it, but i dont think he knew what he was saying.

 

[js1 10+ year member]

3 even length port tubes. 2 chambers, the bigger one holding the sub. 1 pipe for each chamber and one pipe connecting the 2 chambers. Just from what I read.

-js1

 

[btnhfan 5,000+ posts]

what are the advantages of that box over others?

 

[davidfre21 5,000+ posts]

its good for subs that dont have much xmax if i remember right, so there isnt too much excursion or something

 

[Diplexers 10+ year member]

same design as a Bose home audio subwoofer enclosure.

 

[js1 10+ year member]

same design as a Bose home audio subwoofer enclosure.

Except it uses a real sub unlike that paper crap bose.... //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

-js1

 

[Omarvelous 10+ year member]

Also i think the bigger chamber with the sub has to be 2x the size of the oher terminal.

Think i might try it with my 12" XXX..... hmmm

 

[Norcalracer283 10+ year member]

Very cool, thanks to you, and jmacs explaination, i now know more about box constuction

 

[jemorgan85 10+ year member]

The general ABC enclosure ...
Two chambers : One is 2/3 of the total volume, one is 1/3 of the total volume

Three ports : All the same size and length. One in each chamber and one to connect the chambers

An ABC enclosure, as you may have guessed, has two tuning frequencies. Since there is two tuning frequencies, it generally equates to better cone control at and between those two frequencies. This is known as its pass band. You can stray from the guideline and try out your own ABC enclosures. Like any other bandpass enclosure, a wider pass band will have lower output but a flatter response and better SQ or you can use a narrow pass band for greater peak output.

You beat me to it......//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Also known as a 'DCR' enclosure or "dual-chambered reflex".

It is true that this type of box limits excursion even more than a regular ported enlcosure, especially within the range of the two tuning frequencies. This is ideal for low-excursion woofers, as you can allocate them more power without screwing up the suspension......not saying it won't reach it's thermal limits though.

Only bad thing......not one bit louder than a regular ported enclosure.

 

[Ricktc 10+ year member]

What if someone were to try a ABC box, but with 3 chambers instead of 2, to cover an even broader range of frequencies, would it be beneficial at all? Example, one chamber 25 Hz, next 35 Hz, next 45 Hz.

-Rick

 

[Bavarian3 10+ year member]

psh......ill stick with my good old ported enclosures. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif