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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.

Post Subject: The fascinating timePosted by Romy the Cat on: 10/5/2010

Now I have been listening the different crossovers trying to shape the new Macondo general balance. This is so fascinating ceremony that I do have a lot of fan. The things doing alone very well. I boosted upper bass and it worked now very-very well. It took a bit adjustment and I ended up with 20K to 18K deviser and a .022 cap to ground. Midbass now at the same level as MF and I ran my DHT MF with no attenuation in secondary. This is a bit bold move but I chose to do it. The most fascination is with the midbass horn. To my huge surprise and pleasure my midbass horn has absolutely no honk. I heard bass honk in ANY, even the best midbass horns that I heard (BTW, some honk does not bothers me and I even consider it desirable). The key of cause was to find a right low pass filter for midbass horns. It took pretty much an hour with SMS crossover. The leading idea is to run at 107Hz with second order and in phase. The 3rd order at 125Hz doe as well but I begin to have problem with time alignment.

The elevated back position of the horn is not a problem at all what is a problem is an arrival alignment. I did not expect it. Before I was able to move my chair all the way from the mid of the room to the wall and I had no problem. Now I have a relatively narrow window of the locations for my listening chair where the time arrival from midbass and the rest of the system is work out for me. A foot or two delays are well detectable. One might say that it is just 1-2ms and it shall not be a big deal. I do not know what a big deal means – I can hear the effect and I do not like when it delayed, though I do admit that it is not heard in all music. I do not know if the 107Hz, second order will be my last chose but so far it looks like it is good.

The Cat

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