Jump to content
Sign in to follow this  
freddyi

Building a LB76 - any advice?

Recommended Posts

according to hornresp, I could flatten LB76's response by using one of my M151 15s.   LB76 would need 1 pi and a sub.  Still could be a fun project.

 

Reducing the back chamber volume to 25L would flatten response a bit further plus allow 200W into M151 without ever exceeding  5mm excursion.

 

What size throat opening  did PWK use on LB76?  if 3" x 13" - would that be best with a driver like M151 ?  - the patent IIRC indicated larger than 3" in the narrow dimension and look 6 inches


https://i.imgur.com/gbV4xeP.jpg
https://i.imgur.com/mQtF4w4.jpg

 

 

DxUBVPR.jpg

 

here's a comparison between a 0.83 scale Belle with 12pe32 and LB76 with M151

lDm8R6T.jpg

 

Share this post


Link to post
Share on other sites

it appears LB could be vented when using some lower Q 15 - here's an example with a JBL M151 using 44L for the vented case and 25L for the sealed back chamber - how the vented version would sound vs sealed back chamber = ? - any guesses in home use?

JA6uf0k.jpg

Here's a comparison of a stock Belle/K33E to LB loaded with JBL M151 and vented

WMr3dI0.jpg

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

×