Bottlehead Forum
Other Gear => Speakers => Topic started by: 4krow on February 26, 2013, 02:49:23 PM
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I will be starting a speaker project using Audio Nirvana 8" 'standard' drivers. This project is for a friend, and my thinking is to make a really efficient speaker so he can be lured into.....yes, BH territory. He is a cheapskate, but one step at a time(I laugh my evil laugh).
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Greg,
Since you didn't ask a question you must have already settled on a design. What is it?
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In this case, I'm going fer easy. I will use 1.5 CF box with a slot at the bottom of the baffle. Don't want to get trickier than that. Seems like Fz of this driver is about 40 hz, so bass should be reasonable.
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I WILL WARN YOU THOSE AUDIO NIV. DRIVERS ARE NOT THAT IMPRESSIVE IN AN ENCLOSURE LIKE THE ONE YOU MENTION. I HAVE EVEN TRIED THERE 8 ALNICO DRIVER IT IS BETTER BUT NOT BY MUCH. JAN OLSEN
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I have the CAST 8's in an open baffle with Eminence Alpha 15's. Actually very nice, except for an upper midrange shout/glare that I am trying to eliminate. Tried a notch filter, but did not like the effect on the overall signature, took much of the "life" out of the music.
Can't comment on a ported enclosure, but if you want a pure, simple design, go open baffle. Good sound, even including the "shout" which seems endemic to full range dynamic speakers. Even on a small OB, the 8's will deliver surpising bass.
I will continue to work on the OB's. But, they are on the "back burner" while I muddle through my restoration of my 102dB/1w EV Sentry IV's.
Cheers,
Geary
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As for the shout problem, I agree. A device that I have tried has helped a lot, but must be fine tuned for every driver. It is made by Decware and is called the 'gizmo'. All I know is that it is a transformer with a pot connected to it. You can read more about it at the Decware site.
As far as the speaker and the final results in this project, I was quite surprised that the speakers sounded as good as they did. No accounting for it, I must admit, but my customer and I were both surprised by the sound. I also have a set of 8" Alnico cast speakers and they are not the best that I have ever heard, but are acceptable. I am sure that the proper cabinet for these would be required. I used them as OB.