bchristmas Posted July 8, 2019 Share Posted July 8, 2019 Greetings, I currently have a Cornscala A which is in the traditional Cornwall enclosure. I was wondering if it is worth my while to make it a two box enclosure and build the bass bin as the 24" X 24" X24", totally sealed with no ports, will there be a noticeable difference in the low end? Thanks, Bernard Quote Link to comment Share on other sites More sharing options...
Schu Posted July 8, 2019 Share Posted July 8, 2019 What type notoriety of 'low end' are you seeking? Quote Link to comment Share on other sites More sharing options...
bchristmas Posted July 8, 2019 Author Share Posted July 8, 2019 A little more pronounce. Due to my room setup I cannot get them closer to the side walls, so I thought with a larger enclosure that might do the trick. Quote Link to comment Share on other sites More sharing options...
Mighty Favog Posted July 8, 2019 Share Posted July 8, 2019 On Bob's site, look at his original Cornscala design. Look at the first few pictures on this page and you'll get the idea. It still uses ports though. https://critesspeakers.com/cornscala.html Quote Link to comment Share on other sites More sharing options...
PrestonTom Posted July 9, 2019 Share Posted July 9, 2019 3 hours ago, bchristmas said: Greetings, I currently have a Cornscala A which is in the traditional Cornwall enclosure. I was wondering if it is worth my while to make it a two box enclosure and build the bass bin as the 24" X 24" X24", totally sealed with no ports, will there be a noticeable difference in the low end? Thanks, Bernard In general, the -3dB down point will extend about 1/3 to 1/2 octave lower in frequency when the cabinet is ported (with the proper geometry on the box volume and port dimensions). You can model this with WINSID or Hornresp etc. If you simply make a sealed box larger than recommended, then you can get some extended bass response but it may get a bit exaggerated. It is best to model this and not rely on internet recommendations (unless they are backed up with credible measurements). Good luck, -Tom Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted July 9, 2019 Share Posted July 9, 2019 4 hours ago, bchristmas said: Greetings, I currently have a Cornscala A which is in the traditional Cornwall enclosure. I was wondering if it is worth my while to make it a two box enclosure and build the bass bin as the 24" X 24" X24", totally sealed with no ports, will there be a noticeable difference in the low end? Thanks, Bernard Yes. The low end will suck. Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted July 9, 2019 Share Posted July 9, 2019 49 minutes ago, PrestonTom said: In general, the -3dB down point will extend about 1/3 to 1/2 octave lower in frequency when the cabinet is ported (with the proper geometry on the box volume and port dimensions). You can model this with WINSID or Hornresp etc. If you simply make a sealed box larger than recommended, then you can get some extended bass response but it may get a bit exaggerated. It is best to model this and not rely on internet recommendations (unless they are backed up with credible measurements). Good luck, -Tom Good advice. Otherwise, just leave them alone. Quote Link to comment Share on other sites More sharing options...
bchristmas Posted July 9, 2019 Author Share Posted July 9, 2019 Thanks guys for your input, much appreciated. Bernard Quote Link to comment Share on other sites More sharing options...
pzannucci Posted July 9, 2019 Share Posted July 9, 2019 13 hours ago, bchristmas said: A little more pronounce. Due to my room setup I cannot get them closer to the side walls, so I thought with a larger enclosure that might do the trick. If you want more pronounced bass, you don't seal the enclosure. You can (kind of) gain low end extension at the loss of output at enclosure tuning frequency (12db vs 24db rolloff). To gain output, you will make larger ports and even possibly sacrifice cabinet size, though you lose low end extension. Model it as previously stated. Quote Link to comment Share on other sites More sharing options...
pzannucci Posted July 9, 2019 Share Posted July 9, 2019 BTW, make the enclosure bigger and increase the port size and length for the best trade off of bass extension vs output. Quote Link to comment Share on other sites More sharing options...
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