Hey you must have missed the second page of the thread. I already have purchased four 8" drivers.
Tuning is way too low. You have to remember the excursion limit is +/-4mm so it will bottom out at very low volumes with that tuning frequency. The tuning Q is also too low for outdoors use. Even in a large room the optimum Q is 1, outside the relative equivalent of medium size room Q of 0.7 is a Q of 1.2. Luckily it's pretty easy to calculate when you have the Q 0.7 tuning; divide volume with Pi and multiply Fb with SQRT(2).
Even then it's going to be pretty big, and a fair bit larger than my Boominator I fear.
It's not something you can set. The calculation I described above transform a normal Q 0.7 tuning that you can get from WINISD to an exactly Q 1.2 tuning. Both parts of the calculation are needed, you have to both lower the Vb AND increase Fb, otherwise it doesn't work.
10cm port is fine but you can probably get away with a smaller diameter port if needed.
Hi,
IMO:Your design is OK and will definitively deliver more appreciated SQ than a typical boom-box ever would do.(See the picture)
Suggestion: Test with different port lengths: 1.2-6.6 cm, 6.6 cm is Hi-Fi but not necessarily best for open air 2Pi venues.
b
Attachments
...IMO:Your design is OK and will definitively deliver more appreciated SQ than a typical boom-box ever would do.(See the picture)..b
To good to be true,I've posted a picture using bad data. I'll later be back with a revised picture.
b
Thanks for going over it for me!Hi,
IMO:Your design is OK and will definitively deliver more appreciated SQ than a typical boom-box ever would do.(See the picture)
Suggestion: Test with different port lengths: 1.2-6.6 cm, 6.6 cm is Hi-Fi but not necessarily best for open air 2Pi venues.
b
I dont know what the heck I'm supposed to do with all that data in the picture but I'll take your word for it.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.