Rerurn to Romy the Cat's Site


In the Forum: Horn-Loaded Speakers
In the Thread: Should I low pass the midrange @10k?
Post Subject: It might be much simpler then that.Posted by Romy the Cat on: 8/8/2010
fiogf49gjkf0d
 KS wrote:
Thats the kind of stuff I was hoping for. I appreciate the help with this, there seems to be a scarcity of horn related discussion on the web and its proving hard to learn the ropes.

One other unrelated question that could save me a lot of trial and error - If time and phase alignment was not an issue (imagine you were forced at gunpoint to use a digital XO that could compensate for this), would it be advantageous to align the mouths of all horns rather than the drivers? I was looking a building something like a Macondo frame, but I'm wondering the price one pays as far as HF from the tweeter horn smacking into the back of the horns above and bellow? I see you use a fairy directive horn to try squeeze the HF through the narrow gap, but I'll likely have a round tractrix back there so was wondering if I should move the tweeter forward and time align digitally, having that option on hand.

K.S.

replying to you I would like you to know that I religiously do not support digital crossovers, practically with horns. You my read about it elsewhere at the site. About HF and MF time alignment. If you chose is to stay with digital crossover then it shall not be a subject as the digital crossover will set for you any delay at any channel. You do not need to align horns or drivers but rather arrival time – digital can do delays problem-free. Macondo frame is truly shall not be a guidance for you as Macondo is in a way unique configuration had objectives to align the channels naturally. If I were not care about time alignment then it might be a different tweeter, deferent midbass horn and many other things were different. In your case, using digital crossover you are out of wood and free from any Macondo Acxioms – you can do pretty much any configuration you wish.

A few words I would like to say about your question from your previous post. When you refer to the “people on line say” then it is a very idiosyncratic reference. I personally do not know your Radian driver but judging from what I see people do only I do not think that the driver has HF break up. You see, the people on-line are mostly Morons.  A very typical application is to use transiently -challenged compression drivers and then to power then with overly-idle amplifiers. The output stage of you amp see the driver’s impedance and the ratio of you SET OPT will indicated how the output tube is loaded. If you idle the tube too much then the driver cone will not be damped properly electrically (among many other reasons) and the driver will have tendency to sound overly brisk. If you load the output tube too much then it will have problem with transients. Again, I do not know your specific Radian driver but most likely you and the people who complain about it’s top end do drive this Radian with insufficiently loaded amp. You might very simply to test it by shunting your Radian with a power resistor or 16R-4R. By doing this you will vernally load your amp harder. If you recognize that the HF problem of you MF driver will be gone with the resistor (I will give you 95% that it will be the case) then you do not need to listen any people online and just to change the ration of you OPT.

The Cat

Rerurn to Romy the Cat's Site