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RE: All good points! (nt

Posted by Don Reid (A) on December 25, 2018 at 17:01:27

In Reply to: All good points! (nt posted by HarryDStanton on December 25, 2018 at 08:15:38:

I have been building DIY speakers of my own design for over forty years. I have had a good run, but my biggest problem has always getting crossovers good enough to feel I was getting the best out of the drivers and cabinets I used. I avoided this problem with my most recent effort by using a DEQX DSP for crossovers, speaker correction, time and phase correction, etc. and triamplifying the three way horn speakers (see photo). I know this is an expensive path to take, but for amateur speaker builders who follow it it opens up a multitude of benefits.

An example of this is that I wanted the folded corner horns to be back in the corners of the room while I wanted the wide range and super tweeter to be out in the room where they would image best. Counting the length of the horn folded inside the bass cabinets plus the distance between those cabinet's woofers and the wide range horn's driver the acoustic centers of of those drivers were over sixteen feet apart. That obviously wouldn't work. Using DSP to digitally correct the time between drivers I could make them sound as though the acoustic centers of the two drivers were only 3 mm(less than 1/8 inch) apart.

Another great benefit is that different crossover points and roll off slopes could be tried as simply as reprogramming the DEQX. I ended up with crossovers at a nominal 200Hz and 8kHZ and all roll off slopes set to 100dB per octave.

Admittedly this method is not for everyone, but for those who try it the benefits are many.
I dream of an America where a chicken can cross the road without having it's motives questioned.

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