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The acoustic box are Dayton Hifi woofers. The Otop are cheap Chinese speakers, 250W rms. The measured SPL of the speakers is the same. But the Dayton's would not be suitable for this enclosure. Even the cheap speakers are marginally suitable, but you can see the results. The Dayton Audio PA200-8 wou...

Hi Guys, Otops built and tested. See attachments. I did mostly get my 6Db and as an added bonus, a flat phase response in the target frequency band. The Otop is a bit lumpier in the response, but nothing APO equalizer can't fix. Measurements are 1W/1Meter (2.0volt rms). Being winter here I had to do...

Thanks Guys,

I will give a full report once I have 'destroyed' my ply and done all the measurements.

Hi Guys, I asked a simple question and all I am getting back is questions. I am perfectly happy to destroy 2 sheets of ply to see if it will solve my problem. Covid gives me plenty of time. So the question was: Do I need to add some timber in the middle instead of the tweeters so the mouth dimension...

Hi Bill, I will build them to replace 2 acoustic boxes in my "stereo" that can't keep up with the Tuba HT and the mid and high arrays. All I am after is about 6Db more from the same 8" speakers. So will they need something in the mouth in place of the tweeters, or will they perform wi...

I am going to build these for the 100-500Hz spectrum. So I don't need the tweeters. Do I still need some timber in the middle to complete the horn?