I suspect that will probably also be the case for the Linkwitz Transform filter option in Hornresp, but for the sake of completeness the component values will be provided in the next update.
I still plan to construct with Martin King’s or another BLH to achieve a little bass gain from my fullrange driver but in the hornresp simulation of it the response has dips and peaks I assume can be heard. However Martin’s simulation worksheets at the far field listening position looks smoother. If that doesn’t work out, a closed box project using this technique looks promising. I suppose additional power from the amplifier is needed to support the bass gain. My 2 1/2 and 6 watt valve amps probably won’t cut it. Not that I understand it to a great degree, output impedance of tube amps might require an additional buffer.
Prior to these updates, wasn't there LW and 5 band PEQ options in Filter Wizard?
What's the difference between those options and LT? It seems to me they do the same thing with more flexibility with the PEQ.
LT is quicker and easier to use in the application it was designed for. The difference is that the LT is a specialized tool for a specific use, the PEQ is a general tool and will will probably take longer to set up to get exactly the same response as the LT. In an analog implementation, the LT will use fewer components. In DSP, I expect it will use fewer processing blocks as well.
Biquads, either digital (IIR) or analog are the same, so yes.
Using a LT directly is just far more straightforward instead trying a bunch of param EQ and fuss around.
But yeah in the end you can get a very similar response.
I have designed and built back loaded horns since 1994. Even 2 to 3 db ripples are insignificant in real use. Your room does much much worse than this and you listen happily. Sometimes we get paralysis from analysis.
Oh I don't suffer from that. But I work with a lot of people that do. Its a common thing in engineering. Scared to pull the pin and throw the grenade. You do need o do your home work, but at some point we all need to try!
Last edited:
Or just not knowing when to take a step back and think for a second that what you're doing or looking at makes sense or is actually the stuff you want to know to being with
Or just how it all sits within context, aka significance/order of magnitude.
Well that is experience and engineering. And many times we make mistakes. But from those mistakes come the solutions and sometimes the real innovations.Or just not knowing when to take a step back and think for a second that what you're doing or looking at makes sense or is actually the stuff you want to know to being with
Or just how it all sits within context, aka significance/order of magnitude.
Speaking of which. I started out trying to do horn design with very rudimentary software. What we have here from Master McBean is awesome. I tell everyone that I know about it. Amazing how few pro people use it, and I guess how many I do not interact with that do use it.
"But from those mistakes come the solutions and sometimes the real innovations."
Yup. When I built my first speaker, oh it sounded like sweet a$$. Really, really bad. But then I investigated to find out why, and out of those investigations came all the notes that eventually became my website, www.diysubwoofers.org. The DIYers these days don't realise how much easier they have it with all the s/w design tools available now ...
Yup. When I built my first speaker, oh it sounded like sweet a$$. Really, really bad. But then I investigated to find out why, and out of those investigations came all the notes that eventually became my website, www.diysubwoofers.org. The DIYers these days don't realise how much easier they have it with all the s/w design tools available now ...
That depends. If I am doing a back loaded horn where I want as little midrange as I can engineer out the answer is no corners. No corners seems to help cancel out a lot more midrange. If I am hoping for a wideband system yes, do the corners. Devilish they can be. The first horn I built was the Mau horn, for a fullrange 6.5 driver. That was 1994. All reflectors all over the place. If I was to do something similar now I would not use one corner! And I would properly size a coupling chamber and probably line it with rockwool to act as an absorber. Last trick I use is exit out the rear of the enclosure. If you are against a wall you have a lot better loading and a lot less ripple. So design it in 2Pi in Hornresp, and then in the real world you place it is 1 Pi perhaps 0.5 Pi over a limited frequency bandwidth when you consider North American timber construction and you get a rather nice response.
Oh tell me about it. I grew up in the sticks. I think we are near the same age ( 54 ) and there simply were no resources other than Radioshack and the Weems book. Partially useful but mostly cookbook formulas. No engineering. Now! Wow!! Same goes for testing. What we had to do in the 80's versus what we can do now for pocket change. My first Loudspeaker Design Cookbook was the orange one I think the 3rd edition. That was a godsend (Thanks Mr. Dickason! It's all your fault!) By that time I lived near Ottawa and the hallowed NRC and I got into their technical library and I started actually learning. Still do!
Your bandpass.xls is my backup to HR!
Of course, I modified your original file to suit my needs.
New to Horn Response and there are actions that don't make sense to me.
When you simulate a response and then adjust it using the loudspeaker wizard, you see the acoustic power response. Then go to maximum spl and simulating low power, even just 1watt the response drastically changes. i can appreciate the changes going from 1w to 500w, but why the dramatic change?
If you then go to input parameters and hit calculate, it then goes back to the original response.
if someone can hep me understand please?
When you simulate a response and then adjust it using the loudspeaker wizard, you see the acoustic power response. Then go to maximum spl and simulating low power, even just 1watt the response drastically changes. i can appreciate the changes going from 1w to 500w, but why the dramatic change?
If you then go to input parameters and hit calculate, it then goes back to the original response.
if someone can hep me understand please?