protecting 802Gs and JBL 075s

[just me now]

I am about to go to a four way active system...

wondering what value caps I need to put in-line from the different amp's output to the drivers so I don't risk damaging them from turn-on/off pops

802G will be 800Hz and up
JBL 075 will get 7500Hz and up


thanks

[bfish]

Assuming both are 8 ohm drivers, I come up with 50uf at 800Hz, and 7uf at 7500. Voltage ratings should exceed forseen amp output. Film caps are preferred, but hard to come by in those values. NON-POLAR electrolytics are the more common choice, both for availability and price. Some folks even use PIO motor-run caps. Note you'll likely have to adjust your XO delay settings to compensate for the cap phase shift.

You might want to verify my numbers, there's a tech letter on the subject at;
http://alteclansingunofficial.nlenet...ers/TL_205.pdf

[just me now]

thanks

[bfish]

You're welcome!

If you haven't already found it, there's a source of info I've found very helpful regarding active 4-way systems at;

http://www.lenardaudio.com/education/01_eduintro.html

Enjoy!