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

[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

[dB-Kicker]

Ilkka wrote:

Here's the natural (i.e. no HP filter or EQ) of the DIY TC Sounds LMS-5400 18" + 2x18" PR 200L. It indicates that the woofer could use a little bit enclosure volume when using such a low tuning frequency. It goes slightly against any simulation, but hey, that's why I take these measurements. So if you can, I would go with full 10 cu ft per woofer. That will boost up the area around the tuning frequency and give you more output down there..

Ilkka,

Subwoofers measured ground plane in the near field - each face of the woofer that projects sound must be measured at the same distance, and each curve summed and averaged to get the an accurate picture of it's LF performance.

If you can repeat your measurements, I am betting you will find it has more LF output than the initial measurements suggest - and will more closely follow "predicted" curves.

________
dB


(theBeast)