The iMM6 is for use on your phone. That’s ok for quick idea of what is happening. What you need is a mic that goes into your PC/MAC sound card so you can use REW to make measurements and analyze data. You can also make one if you are handy. Just use Panasonic WM61a mic capsules and preamp circuit available on web. That methods costs $4.
Panasonic Wm-61a Electret Condenser Mic Capsule 20pcs | eBay
Panasonic Wm-61a Electret Condenser Mic Capsule 20pcs | eBay
Perceval. Ooooh, I’d be there in a moment if I could! Cars, bikes, speakers what else is there in life?
Ha ha, fortunately I guess I have to much on my plate with all 3 here. Your are lucky though to have the VW and Triumph plus the weather. Right now -30 but next week +12, chinooks blowing in soon.
Ha ha, fortunately I guess I have to much on my plate with all 3 here. Your are lucky though to have the VW and Triumph plus the weather. Right now -30 but next week +12, chinooks blowing in soon.
I have to learn to do this. Give me some time and I'll figure out.
It sounds to my taste now. Give them some time and they will shine.
Thanks Bjorn again for sharing such a good design. The two pair of drivers sit doing nothing without this design.
Actually it's not that simple, because I know of two different measurements and they are not identical to the published specs:
Qts=0.45 - by user XRK871 - Decware DNA Horn
Qts=0.65 - TB SPEAKERS W5-2143 (Full-range 5", 8 Ohm, 60 Wmax) (image located in the lower part)
After playing around with the different data sets I realized it will be a 30-40 liter enclosure tuned in the 46-55 hz interval... maybe a little higher if that Fs is really above 80hz. The reviews report a disappointing bas performance with bas reflex enclosures but no bad word from TL designs, in fact I believe I found a japanese source that reported excessive bas from a TL (note:google translate is not perfect).
I believe tuning higher is the right strategy for this driver, in the sense not to push it as low as possible, the rest is TL magic as you go lower plus the Sd is much larger than a 3 incher or a 4 incher (Sd=92cm2 - measured by me with 1/2 surround minus phaseplug).
Martin King has a page or doc somewhere showing how to do this. (Now I can't find it though
). Simplistically, the CSA is doubled "everywhere". That includes the port.
Like Jerms said, and if you don't want to double the enclosure, you could go with the last TM in a sealed enclosure on top. That would make it a 3-way.