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Re: First Impressions [message #20801 is a reply to message #20799]

Sat, 09 April 2005 23:33

ronbrady
Messages: 10
Registered: May 2009

Chancellor

Hi Fred
I took some time to run a few simulations for you in WinISD for a bass reflex enclosure of 2.5 cu. ft. tuned at 71Hz for the Nirvana 8" using the published specs and I must say that it is one of the most unattractive alignments for that driver and box combo. There is a -2db hole from 100-200Hz and a +3db peak at 75Hz. I continued to run the simulation to try and fit that driver to that box and the best alignment I could come up with is a port tuning of 41Hz which would use just one of your 3" ports and would be 2.25" long but the worst part is that the qes must be changed by adding an 8.5 ohm resistor in order to get the qts up to .40 which is about the minimum for this box and driver combo. Unfortunately the addition of 8.5 ohms of series resistance will throw away a lot of effiency but for that size box I don't see any easy alternative. I could run some sims for a smaller box for you if you like but it looks to me that this driver really would work best in a horn style enclosure. I hope that some of these quys will be able offer you a better solution.
Best wishes
ron brady

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[Message index]

		Audio Nirvana Speakers By: FredT on Sat, 26 March 2005 15:40
		Re: TL Help!!!! By: ronbrady on Sat, 26 March 2005 23:37
		Re: TL Help!!!! By: FredT on Sun, 27 March 2005 04:58
		Nirvana drivers By: ronbrady on Sun, 27 March 2005 08:48
		Re: Nirvana drivers By: lon on Sun, 27 March 2005 15:14
		Re: Audio Nirvana Speakers By: Poindexter on Sun, 27 March 2005 09:48
		Addendum. By: Poindexter on Sun, 27 March 2005 09:51
		Re: Audio Nirvana Speakers By: roncla on Sun, 27 March 2005 17:29
		Re: Audio Nirvana Speakers By: FredT on Sun, 27 March 2005 19:51
		Link to the review By: FredT on Sun, 27 March 2005 19:53
		Re: Audio Nirvana Speakers By: akhilesh on Mon, 28 March 2005 11:27
		Audio Nirvana versus Omega Speakers By: FredT on Mon, 28 March 2005 17:46
		My thoughts on new full range drivers coming out By: akhilesh on Tue, 29 March 2005 06:17
		The Audio Nirvana Drivers Arrived Today By: FredT on Mon, 04 April 2005 17:35
		Re: The Audio Nirvana Drivers Arrived Today By: Wayne Parham on Tue, 05 April 2005 02:55
		Re: The Audio Nirvana Drivers Arrived Today By: FredT on Tue, 05 April 2005 03:51
		Re: The Audio Nirvana Drivers Arrived Today By: Wayne Parham on Tue, 05 April 2005 04:07
		Re: The Audio Nirvana Drivers Arrived Today By: colinhester on Wed, 06 April 2005 09:46
		Took The Plunge By: FredT on Tue, 29 March 2005 14:36
		Re: Took The Plunge By: roncla on Tue, 29 March 2005 15:25
		gainclone By: ronbrady on Tue, 29 March 2005 23:25
		I'll volunteer to measure TS params if someone ships me a driver By: akhilesh on Wed, 30 March 2005 07:58
		Re: I'll volunteer to measure TS params if someone ships me a driver By: lon on Fri, 01 April 2005 21:33
		Re: I'll volunteer to measure TS params if someone ships me a driver By: akhilesh on Sat, 02 April 2005 08:09
		Re: Took The Plunge By: akhilesh on Tue, 29 March 2005 15:40
		You Are Correct By: FredT on Tue, 29 March 2005 16:17
		Re: You Are Correct By: GM on Wed, 30 March 2005 18:06
		Re: You Are Correct By: lon on Fri, 01 April 2005 21:29
		Re: You Are Correct By: GM on Sun, 03 April 2005 00:46
		Re: You Are Correct By: lon on Sun, 03 April 2005 15:31
		I must ask about stuffing.... By: bernieclub on Fri, 08 April 2005 09:55
		Re: I must ask about stuffing.... By: Bob Brines on Fri, 08 April 2005 14:30
		Thankyou! By: bernieclub on Fri, 08 April 2005 15:54
		Re: I must ask about stuffing.... By: lon on Wed, 13 April 2005 13:59
		Re: I must ask about stuffing.... By: lon on Sat, 09 April 2005 15:23
		Re: You Are Correct By: GM on Wed, 13 April 2005 12:11
		Dialog on MLTL using F127e continues [Re: You Are Correct] By: lon on Wed, 13 April 2005 13:48
		Re: Took The Plunge By: Kim Schultz on Wed, 30 March 2005 02:27
		Here's Where I Am By: FredT on Thu, 31 March 2005 07:48
		First Impressions By: FredT on Fri, 08 April 2005 13:43
		Re: First Impressions By: Wayne Parham on Fri, 08 April 2005 17:09
		Re: First Impressions By: ronbrady on Sat, 09 April 2005 08:33
		Re: First Impressions By: Manualblock on Sat, 09 April 2005 11:36
		Re: First Impressions By: Martin on Sat, 09 April 2005 12:31
		Re: First Impressions By: Wayne Parham on Sat, 09 April 2005 13:29
		Re: First Impressions By: Manualblock on Sat, 09 April 2005 14:30
		Enclosure Size and Tuning By: FredT on Sat, 09 April 2005 19:28
		Re: Enclosure Size and Tuning By: Martin on Sat, 09 April 2005 19:52
		Toe-In By: FredT on Sun, 10 April 2005 04:20
		Re: First Impressions By: ronbrady on Sat, 09 April 2005 23:33
		Re: First Impressions By: FredT on Sun, 10 April 2005 03:42
		Re: First Impressions By: akhilesh on Wed, 13 April 2005 12:53
		Re: Audio Nirvana Speakers By: Scott_M on Sun, 10 April 2005 10:32
		Re: Audio Nirvana Speakers By: FredT on Sun, 10 April 2005 18:54
		Brightness Tamed By: FredT on Mon, 11 April 2005 11:23
		Now That They Have A Few Hours on Them By: FredT on Thu, 14 April 2005 20:11
		Re: Now That They Have A Few Hours on Them By: roncla on Sat, 16 April 2005 18:32
		8" Audio Nirvana SPL vs Freq By: FredT on Sun, 17 April 2005 20:39

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