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In the Forum: Horn-Loaded Speakers
In the Thread: 8" Goto Woofer for 60Hz Horn
Post Subject: The last 5-10Hz... and the driver.Posted by Romy the Cat on: 11/23/2008
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Keith,
You would never know from the data how those upperbass driver will behave in horns. The 55Hz of air resonance (if it is true number that always not the case) is a good number for 60-70Hz horn. I really would like to know the max amount of mm that the driver runs away and the length of the gap. Knowing excursion, magnetic density (8,000 Gauss is on low side), geometry and sensitivity it is possible to make a rudimental assessment, which still might not be related to actual sound. I am a little concern that the driver has just 96dB. It might be a sign that GOTO went economical on magnet – that would be bad. Or it might be a sign that GOTO wanted to keep the bottom knee of this driver to be “soft” – that is very good sign.
If you are looking for 50/60Hz midbass horns then I would say that this diver might be a bit too stiff. GOTO has SG-30WR driver that has 10Hz lover resonance frequency and it might be a better chose if you insist to stay with GOTO. The last this you would like to have is to build 60Hz midbass horn and to learn that your driver (not the horn) eat the last 5-10Hz. Do not forget that in your 5-10Hz will be the 70% of your horn’s cost…
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