Isobaric, Bass Reflex

Ok need Hellppp I have 4 vega 10"  (vega 104)

and I want to put them into a Isobaric - Bass Reflex box

Need to know box and port size / legnth

anyone know ?????

dwarren wrote:

---

Fisrt off, you will need to locate the t/s parameters for those woofers, then have a read here

---

DYohn] wrote:

---

hy do you want to ISO mount those?  Oh well, see page 11 of the manual you linked to.  Build an enclosure exactly like that shown for one woofer.  Mount all four in an Isobaric arrangement, and you'll be good to go.

---

DYohn] wrote:

---

he proper enclosure size, port size and length are printed right there in the manual.  No need for a calculator.  Four woofers ISO mounted will require the same size enclosure as one woofer mounted normally.

---

taziam wrote:

---

DYohn] wrote:

---

he proper enclosure size, port size and length are printed right there in the manual.  No need for a calculator.  Four woofers ISO mounted will require the same size enclosure as one woofer mounted normally.

---

realy oh ok wow thanks sorry guess i missed that im sorry

---

so 2 chambers 2 woofers in each is equal to the 1.77 qubic ported same port etc hmm interesting

DYohn] wrote:

---

ou need to understand isobaric mounting.  Two woofers mounted isobaric requires 1/2 the enclosure volume of one woofer for whatever enclosure alignment you are using.  So, if you use 4 woofers, that will require one chamber that is the size normally needed for one woofer.  If you build to the specs suggested by the manufacturer you will be able to mount them in the size they have already calculated for one, although be sure you account for all that driver displacement so you end up with the same unused airspace as they specify.  Basically, you will not gain anything in terms of SPL over using just two woofers, but you will be able to handle vast amounts of power and the enclosure will be 1/2 the size normally used for two.  How it will sound is questionable, but if you want to go for it, then do.

---

taziam wrote:

---

ok gotcha now small question the port size length remains the same? 

---

Yes, as long as the internal volume of the enclosure is the same as they specify.

DYohn] wrote:

---

P>

taziam wrote:

---

ok gotcha now small question the port size length remains the same? 

---

Yes, as long as the internal volume of the enclosure is the same as they specify.

---

each chamber will be half of the normal. what will be the port then ? half of normal recomended???

DYohn] wrote:

---

o, ports do not work like that.  If you want to build two chambers, the Vb of each will be 1/2 that required for a single woofer, and the port length can be calculated using the "Port Length Calc" link on the left side of this site and the 35Hz tuning frequency recommended by CV.

---

taziam, it's hard for others to follow this post and learn something from it if you use a full quote from the previous statement each time you post the next question.  It makes it jumbled and confusing.  Just ask the question.  DYohn will pay attention to this thread.  Ain't nobody else answering to make anyone wonder whose answer you're referring to!  ;)