Best 4.5 inch drivers?

jazzbearz · 14th January 2005, 07:01 AM

I am trying to exchange my old nht zero units to others. My idea is making it like an mani 2. what is the best 4.5 inch unit under $300 which can go down around 60s and also has good mid range out of it. don't care about efficiency prob.
Thanks in advance.

morbo · 15th January 2005, 08:02 PM

Well, you picked a perfect time to ask! John Krutke just posted a very thorough comparison of 3 of the best 4.5" drivers. See here:

http://home.new.rr.com/zaph/audio/4.5test/

jazzbearz · 16th January 2005, 07:52 AM

Thanks a lot!

Nanook · 16th January 2005, 10:01 AM

The original Super Zero used a Tonegen 458 woofer--not sure if it is available anywhere..

efficiency was 86db
85Hz(-3 db) 12db/octave low pass @ 2.2kHz
7.5 Ohm min resistence.

To me it seems that thw Seas L12 would be a close match, in regards to efficiency, and impedence (and frequency response too!). I guess I would calculate the enclosure and do a little more work if they were mine..

stew

jazzbearz · 16th January 2005, 07:21 PM

I did calculate myself. I found out I need a port to get bass tuned about 50hz. Do you guys think this will work through this small enclosure?

planet10 · 16th January 2005, 08:52 PM

The new CSS WR125 is very worthy of consideration... the XBL tech gives it really good extension at the bottom (while giving up some top to something like the Jordan JX92 -- the latter pushing your budget a bit)

dave

LineSource · 17th January 2005, 01:22 AM

Hi Jazzbearz,

I've attached a plot of Xmax displacement vs. frequency for a 4.5" speaker in a sealed box for producing 110 db SPL @ 1m. This would give about 90db at the listening position with reasonable headroom for transients.

Most single 4.5" speakers are crossed around 300Hz and 2Khz to match their excursion and IM distortion limitations.

I get the best midrange sound from a sealed box with a lot of sound absorpton material to keep reflections from the rear of the cone. I have not seen many high end speakers with ported midranges.

Cal Weldon · 17th January 2005, 10:15 PM

I'm with planet10 dave. I got to hear the CSS a couple of months back and again a week or so ago, and I was stunned. For such a small driver, the bass extension was surprising. High end good also. Hardly needs a tweeter.

Cal

morbo · 17th January 2005, 11:40 PM

Count me as #3 vote for the CSS driver. I am using it full range and it sounds nice, LOTS more bass capabillity than the little tonegen woofer in the superzero, which I've owned before. Its also fairly easy to crossover because of the controlled cone breakup.

14th January 2005, 07:01 AM	#1
jazzbearz diyAudio Member Join Date: Dec 2004 Location: State College, PA	Best 4.5 inch drivers? I am trying to exchange my old nht zero units to others. My idea is making it like an mani 2. what is the best 4.5 inch unit under $300 which can go down around 60s and also has good mid range out of it. don't care about efficiency prob. Thanks in advance.

16th January 2005, 10:01 AM	#4
Nanook diyAudio Member Join Date: Feb 2004 Location: Chinook Country.Alberta	replacement woofer... The original Super Zero used a Tonegen 458 woofer--not sure if it is available anywhere.. efficiency was 86db 85Hz(-3 db) 12db/octave low pass @ 2.2kHz 7.5 Ohm min resistence. To me it seems that thw Seas L12 would be a close match, in regards to efficiency, and impedence (and frequency response too!). I guess I would calculate the enclosure and do a little more work if they were mine.. stew

16th January 2005, 08:52 PM	#6
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	The new CSS WR125 is very worthy of consideration... the XBL tech gives it really good extension at the bottom (while giving up some top to something like the Jordan JX92 -- the latter pushing your budget a bit) dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

17th January 2005, 10:15 PM	#8
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	I'm with planet10 dave. I got to hear the CSS a couple of months back and again a week or so ago, and I was stunned. For such a small driver, the bass extension was surprising. High end good also. Hardly needs a tweeter. Cal __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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15th January 2005, 08:02 PM	#2
morbo diyAudio Member Join Date: Sep 2004 Location: Guelph, Ontario	Well, you picked a perfect time to ask! John Krutke just posted a very thorough comparison of 3 of the best 4.5" drivers. See here: http://home.new.rr.com/zaph/audio/4.5test/

16th January 2005, 07:52 AM	#3
jazzbearz diyAudio Member Join Date: Dec 2004 Location: State College, PA	Thanks a lot!

16th January 2005, 07:21 PM	#5
jazzbearz diyAudio Member Join Date: Dec 2004 Location: State College, PA	I did calculate myself. I found out I need a port to get bass tuned about 50hz. Do you guys think this will work through this small enclosure?

17th January 2005, 11:40 PM	#9
morbo diyAudio Member Join Date: Sep 2004 Location: Guelph, Ontario	Count me as #3 vote for the CSS driver. I am using it full range and it sounds nice, LOTS more bass capabillity than the little tonegen woofer in the superzero, which I've owned before. Its also fairly easy to crossover because of the controlled cone breakup.

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