DIY TC Sounds LMS-5400 18" + 2x18" PR 200L *new*

[vinculum]

This excusion chart looks very close to what the Acoupower 18" driver and these PRs model like. You really need to make sure there is a HPF inserted near the tuning frequency because things get out of hand very quickly with the PRs at and just under tune. (with maximum power anyhow)

Sounds crazy, but 4 PRs per driver would give so much more excursion headroom. Higher cost immediately comes to mind, but compare the costs of 2 TC Sounds VMP's @ $250 each and the cost of 4 AE PR's @ $129 each. $500+shipping vs. $516 plus shipping. Not much of a cost difference if you were able/willing to buy the TC PRs. Making a box would be more challenging. bottom firing active driver and a PR on each side of a square comes to mind. Just an idea i had floating around in my head...

Dr V

edit : After a little modeling, it appears the necessary HPF used to curb the active drivers excursion below tuning also takes care of the PRs no matter how many you have. Maybe 4 PRs would indeed be a waste of money?

[ec114]

Thanks for the thoughts, Dr. V. What PR mass and tuning did you finally end up with? Might have missed it, but didn't see it in your thread...

[vinculum]

I was just theorizing out loud. I didn't end up with anything.

Any updates to my actual build will be posted in my build thread.

Dr V

[robertcharles123]

Ilkka,

Can you tell me a little about setting up the equipment and microphone to test these cabinets.







With the opposed drivers,is there a a certain place to set the mic? Does it just go to the sides of the drivers?

Thanks,

Robert