Hello Everyone! 😀
My Rule Of Thumb is
QTS
0.1 - 0.26 = Front Horn Load
0.27 - 0.35 = Rear Horn Loaded
0.36 - 0.45 = Reflex In A Suitable Size Enclosure
0.46 - 0.6 = Reflex to Sealed In A "Why Do You Need Such A Big Box To Get A Flat Respose????!!!!??? 😱
🙁 
What Is Your Box Calculator Method??
My Rule Of Thumb is
QTS
0.1 - 0.26 = Front Horn Load
0.27 - 0.35 = Rear Horn Loaded
0.36 - 0.45 = Reflex In A Suitable Size Enclosure
0.46 - 0.6 = Reflex to Sealed In A "Why Do You Need Such A Big Box To Get A Flat Respose????!!!!??? 😱
🙁 What Is Your Box Calculator Method??
OMNIFEX said:
Fs/Qts > 120
and Qts to about 0.32 max.
Some exceptional designer like Tom Danley can bend these rules, vis the LABhorn with a Qts of .39 and an Fs of 22
So EBP = 22/0.39 = 56
I don't do boxes.
Box calculator
EBP or Efficiency Bandwidth Product is calculated by the formula EBP = Fs / Qes not Fs / Qts
Doug😉 😀
EBP or Efficiency Bandwidth Product is calculated by the formula EBP = Fs / Qes not Fs / Qts
Doug😉 😀
Re: Box calculator
Thanks, that was a typo. I pulled the right value from the datasheet though.
Doug said:
Thanks, that was a typo. I pulled the right value from the datasheet though.
Re: Re: My Box Caculator
Yes thats true. Unfortunatley, underprivilaged kids 🙂cannotbe: 🙁 ) like you and I, 🙂bawling: ) cannot call Eminence, and have a speaker designed to our specificatons. (Not without a major account ofcourse!)
In My "QTS Theory" I was reffering to front midrange drivers in addition to bass horns. After trying to be smart 🙄 and ordering a speaker on ebay, to replace speaker in a bass horn
(due to a loose/worn out suspension) I found myself putting it
back in the box (The new speaker) after A/B ing them and hearing
the 0.2 QTS driver (In the bass horn) destroying the 0.4 QTS driver (The new speaker) in the same bass horn. (Around a 4 dB
difference!!!)
On a side note. The Lab 12 requires a small box sealed box to get down low, and needs the horn to raise its efficency.
Put two Lab 12's in a vented cab, and @ 1 watt, 1 meter your
looking at 90dB @ 100Hz
Brett said:
Yes thats true. Unfortunatley, underprivilaged kids 🙂cannotbe: 🙁 ) like you and I, 🙂bawling: ) cannot call Eminence, and have a speaker designed to our specificatons. (Not without a major account ofcourse!)
In My "QTS Theory" I was reffering to front midrange drivers in addition to bass horns. After trying to be smart 🙄 and ordering a speaker on ebay, to replace speaker in a bass horn
(due to a loose/worn out suspension) I found myself putting it
back in the box (The new speaker) after A/B ing them and hearing
the 0.2 QTS driver (In the bass horn) destroying the 0.4 QTS driver (The new speaker) in the same bass horn. (Around a 4 dB
difference!!!)
On a side note. The Lab 12 requires a small box sealed box to get down low, and needs the horn to raise its efficency.
Put two Lab 12's in a vented cab, and @ 1 watt, 1 meter your
looking at 90dB @ 100Hz
Re: Re: Re: My Box Caculator
If you're not going to use the LABs in a horn, my guess about the next best option would be push pull open baffles like the Linkwitz, EQ'd to heck and driven really hard. The Adire DPL12 is almost identical and it's apparently very good in an OB. Place the enclosure down next to the wall floor interface (Allison loading) and use a vertical extension panel 90* and vertical to the wall to make a baffle extension. Depending on the room and layout, it could be very good.
OMNIFEX said:Put two Lab 12's in a vented cab, and @ 1 watt, 1 meter your
looking at 90dB @ 100Hz
If you're not going to use the LABs in a horn, my guess about the next best option would be push pull open baffles like the Linkwitz, EQ'd to heck and driven really hard. The Adire DPL12 is almost identical and it's apparently very good in an OB. Place the enclosure down next to the wall floor interface (Allison loading) and use a vertical extension panel 90* and vertical to the wall to make a baffle extension. Depending on the room and layout, it could be very good.
- Status
- Not open for further replies.