Eric Forker's 77hz conical horn

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
I'm about to build Eric's design, but I did model some changes in hornrep that flatten the freq response and extend it a bit on top and bottom for my JBL2220 driver. The differences are:
S1=350 vs. 500
S2=2614 vs. 2978
L 12= 84cm vs. 77,3
Vtc= 1300 vs. 1000 (last shown on spk'er asylum, 1198 per spec's Eric sent me).

This basically adds a bit of length but mostly increases the throat
compression from 1.78:1 to 2.54:1, which from what I've read, should be fine for home use.

My questions if you anyone can help:

Do you think there is any concern with the changes I'm suggesting?

I can easily add the length to Eric's templates, but I can't figure out how
the VTC is determined in order to know what the template actually gives,
nor how to alter it to 1300.
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.