Recent content by Kevin McDonough

hey all A friend who's just bought over a small speaker brand picked up a B&C DCX454 and the rather large ME 464 horn, really just because he was interested in using it and having a play. I've been looking at designs for it. We had a look at the Youtube video B&C made where they use it with...

Yeah, that seems like a lot! I can understand that this is maybe a reasonable price for commercial work, where the file would be made once and then hundreds or thousands of products would be made, but for a one off set of speakers it seems a lot. A day's work for an experienced machinist...

The information that comes in the DWG file has all the exact dimensions for each piece of wood that's needed to build the speaker. However this in itself isn't ready to just plug straight into a CNC router. Some work is needed to take the CAD file and put it into the CNC program that runs the...

Hey all with the recent trouble the world has been having, all things audio and speaker related got put on the back burner. However a friend has/is in the process of buying over a small UK speaker brand and possibility of working on some designs and products with him has given me a reason to...

They look like phono line level connections, possibly using Phono (or RCA) connectors like these.... which would mean they don't power the speakers themselves. That signal has to be fed into an amplifier, which is then connected to the speakers, either a home HiFi type amplifier for use at...

I'm sure Peter will be along soon and elaborate, but initially during his measuring and processing of the system, he used all pass filters to flatten out the phase response of the pass bands, and delay to then line the three pass bands of the tops together properly. That was most of the work in...

hey guys Thank you all for your replies and help. I was aware of Josh's great designs, as I mentioned it was his Othorn that started me on this design journey, and I was also a big fan of the SKHorn. I wasn't totally aware that a single driver version had been created though, and will go...

hmmmm yeah that's not ideal lol, it changes the response quite significantly, and not in a great way lol :oops: are there any links for reading on what changes this Lossy LE function makes, why it's applied etc? would be good to understand it a bit more. Kev

Well, in terms of the fact that it is a Ported Horn, then yeah it's a similar design. But most of the actual design is different, it has a different horn and port area, different internal volume, different fold design etc. Following Art's suggestion I started working on an offset horn...

Adding some screen grabs and data, first the hornresp input screens. I'm way less experienced at horn design than all you guys, so of course feel free to point out any obvious mistakes I've made, always happy to learn how to be better. Normal horn with bigger shelf port..... Same horn with...

Thank you all for your responses :D Art, the paper I refer to about the different shapes of ports was one by Scott/DIYRM that was put on the 'speaker freakers' group on Facebook. I think this link should work...

haha, clearly I've stunned people in to silence with my amazing design! Would be really interested in people's thoughts on the design, most on here have more experience in designing speakers than me, so do people think the round ports and the slight bonus that results in internal volume would...

hey all. Would like to get people's opinions on a possible design for a 21" ported horn if you would be so kind.... A little history to the design, it all started when I read a thread about the Othorn. I vaguely knew it existed before, but had never really paid it much attention. However one...

hey Simply, its because MP3's are designed specifically to BE lossy, to give up information. Yes, it's possible to compress a file without losing any data. The examples you give of FLAC and RAR are such, and they compress the information as much as they can while still keeping the data...

hey yeah as said, the two common issues is that firstly the volume you get from the software is the net volume of actual air that needs to be in the cab. The volume of air inside the ports isn't counted in this, so the cab has to be larger by this amount to make it work, and everything else...