Klipschguy Posted November 4, 2019 Share Posted November 4, 2019 Greetings, What would be the effect of mounting a 6.5" full range with a whizzer cone onto an oval slot measuring about 6" x 3"? Would it sound okay or would I have to route out the hole? I am trying to upgrade some digital piano speakers and the oval grills look good, plus routing the holes has tricky access. Thanks, Andy Quote Link to comment Share on other sites More sharing options...
karlson3 Posted November 5, 2019 Share Posted November 5, 2019 it would tend to increase the dispersion over part of its range . Say the oval is 6 inches high and 3 inches wide - then the horiaontal dipersion would be improved and things less beamy compared to the speaker's full diaphragm being used. As long as the cone can't hit the baffle, give it a try. Here;s an oval lens I tested years back on a 15 inch woofer (solrry for the wrong smoothing but relatively speaking it shows the effect) Note how close the "on" to 45 off horizontal axis traces are for the case with the oval lens vs no lens in the 1-2KHz region. Your slot would have its effect a bit more than an octave up vs the one in this picture. The use of those goes back at least to the time of G.A, Briggs and the R-J Enclosure. Later in BBC monitors. Currently JBL uses a modified oval slot in one line of their speakers. If the JBL slot were used to make a modern "R-J", it would look something like my crude mess below. The R-J vented its backwave through a slot. The first slot in the prototype was rectangular. The first production R-H had a lopsided "diamond" slot and the final slot was something like a lemon shape. In some cases, such a slot could be used to get a better directivity match to a tweeter horn/waveguide at crossover. 2 Quote Link to comment Share on other sites More sharing options...
Klipschguy Posted November 5, 2019 Author Share Posted November 5, 2019 Karlson3, Thank you for the reply; that was exactly the information I was looking for. I guess your forum name comes from the Karlson speaker? Andy 1 Quote Link to comment Share on other sites More sharing options...
karlson3 Posted November 6, 2019 Share Posted November 6, 2019 Hey Andy - yeah on the Karlson speaker - great cabinets when loaded right. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.