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Older Activity
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Today, 07:16 PM
I'm still a bit unsure of this situation. A woofer in a closed box will roll off second order. Add anything else, port or PR and regardless of the...
49 replies | 972 view(s)
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Today, 05:19 PM
I must be on of the three or four DIYiest guys in my state, if that is the case...
13 replies | 384 view(s)
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Today, 05:18 PM
Well done sir, and with regards to the painting we are going to start with some basic brush on tempura paints - unless she expresses a desire for...
13 replies | 384 view(s)
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Today, 04:33 PM
Measurement thread here
26 replies | 826 view(s)
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Today, 04:33 PM
Build Quality Review Here
My cable finally arrived from China today. It is a simple splitter, It has a female TRRS on one end, and splits it out...
1 replies | 71 view(s)
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Today, 11:41 AM
We have nothing like that around here, that is a pretty cool critter. We have lots of those moths that look like hummingbirds, and once in awhile you...
16 replies | 490 view(s)
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Today, 10:29 AM
I think after this speaker project is finished, we are going to put together a little amp.
13 replies | 384 view(s)
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Today, 08:57 AM
I went to my CALSOD design for the Chameleons, the PR mode version. It does roughly match a 12db below Fb. It shows a dip at Fb as expected. I used...
49 replies | 972 view(s)
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Yesterday, 11:06 PM
Jeff, do you have something that shows the phase of the woofer and PR individually in addition to the total phase?
dlr
49 replies | 972 view(s)
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Yesterday, 09:56 PM
The quick brown fox jumps over the lazy brown speakchat.
526 replies | 33973 view(s)
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Yesterday, 09:56 PM
I graduated from Moore High School, along with my sisters. One lives in Norman and was on the phone with my mother when the line went dead. I was...
19 replies | 421 view(s)
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Yesterday, 08:04 PM
Re-doing my Driscoll project from 2011. This time, it is getting a Discovery 4 ohm 5", and a Vifa XT25.
I finished up the voicing today, and......
13 replies | 384 view(s)
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Yesterday, 07:20 PM
Are any of us in Oklahoma? They were hammered pretty hard recently. If so, I hope you are ok. This is a community, and we all pull for each other in...
19 replies | 421 view(s)
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Yesterday, 03:56 PM
This is a pretty cool little project.
I have a tiny TM that my daughter and I will be working on in the coming weeks.
6 replies | 427 view(s)
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Yesterday, 01:29 PM
Any idea how the 1850 and/or the 1798 compare to the 1757?
1757: http://www.parts-express.com/pe/showdetl.cfm?partnumber=264-881
1850:...
25 replies | 5392 view(s)
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Yesterday, 11:17 AM
Ah yeah, I did listen to something new to me not that long ago. Some of the Shawn Smith projects. Interesting musician.
54 replies | 1369 view(s)
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Yesterday, 11:10 AM
She is wonderful! I first heard one of her songs in a Sopranoes episode, the song was "The Captain".
54 replies | 1369 view(s)
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Yesterday, 03:29 AM
I liked it too. Trampled by Turtles might also be a band you would enjoy.
54 replies | 1369 view(s)
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Yesterday, 02:07 AM
I have not had time to listen to anything new, with the exception of the basement-recorded demo tracks of my wife's band.
54 replies | 1369 view(s)
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Yesterday, 02:06 AM
What think you of The Lumineers album?
54 replies | 1369 view(s)
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Yesterday, 12:34 AM
It would be a unique opportunity :)
I see poly cones for sale here and there. One thing I have thought of doing is removing the phase plug, and...
21 replies | 567 view(s)
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05-19-2013, 09:32 AM
Interesting. How did you produce that? I'm not a fan of color gradation for intensity.
dlr
12 replies | 274 view(s)
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05-19-2013, 09:28 AM
I will be doing that, but I'm not at that point right now. Your point is taken.
In reviewing Small's PR "Analysis" paper, there are two...
49 replies | 972 view(s)
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05-18-2013, 11:32 PM
Your description of "being 12db/oct -aligning with the roll-off of the PR" does not make sense. The system is the summed response, it won't align...
49 replies | 972 view(s)
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05-17-2013, 10:10 PM
What is the slope of the asymptote as frequency approaches zero? That is what defines it, just as a crossover slope "number" is defined by its...
49 replies | 972 view(s)
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05-17-2013, 08:46 PM
I'm aware of the dip due to the PR surround resonance, but at the limit a PR is the full implementation of a reflex system with the ported one being...
49 replies | 972 view(s)
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05-17-2013, 05:40 PM
I think it's more than compliance at issue. Consider the situation for displacement within the operating limit of both woofer and PR.
I believe it...
49 replies | 972 view(s)
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05-17-2013, 01:10 PM
I am in. Gotta start doing some design work though.
54 replies | 1223 view(s)
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05-16-2013, 11:18 PM
I only drive five on the way down, but is about 30 on the way back...
54 replies | 1223 view(s)
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05-16-2013, 11:07 PM
East central.
54 replies | 1223 view(s)
About critofur
- Biography:
- I used to love listening to music, but I haven't found a speaker I like in years
- Location:
- Columbus
- Interests:
- Computers, speakers, photography, chess, forums, science...
- Occupation:
- Computers, speakers, photography, real estate management and investment, gardening
http://www.ohmspeakers.com <- I like to stop in and see my old buddies there when I'm in NYC
Total Posts
- Total Posts
- 1,881
- Posts Per Day
- 0.97
Albums
- Total Albums
- 3
- Total Pictures
- 8
Visitor Messages
- Total Messages
- 26
- Most Recent Message
- 04-06-2012 12:09 PM
General Information
- Last Activity
- Today 02:17 PM
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- 02-05-2008
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Showing Friends 1 to 8 of 8
View critofur's Blog
by critofur on 05-08-2010 at 10:34 PM
It's good to protect woofers against over excursion below the tuning frequency with a passive HP filter.
Not only is the woofer probably operating out of it's intended range below the tuning frequency, it's also basically useless wasted and counterproductive output since it's out of phase with the port - and , as mentioned previously, output at those low levels will cause excessive amounts of excursion.
Preventing this not only protects against damage from over excursion,
Read More
by critofur on 05-06-2010 at 08:17 PM
Has everybody stuck a driver in a cardboard box and listened to it? Hmm, not a bad sounding box - considering the back is almost as loud as the front Hahaha :P
"speaker in a box" gallery...
by critofur on 05-01-2010 at 12:12 AM
I grew up in Indiana and I never heard soda called just "pop". "Soda pop" sometimes, yes. Maybe people said pop once in a while, but I think usually people asked for a soda by saying what kind they wanted, usually - i.e.: "I'd like a Coke/root beer/ginger ale/diet Pepsi...etc...". Then again, my extended family and friends generally didn't drink sugar water beverages other than natural fruit juice. I do like Tang, when I go on a long backpack trip up in the mountains
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by critofur on 04-27-2010 at 12:31 AM
$1.50 ea for 9.6mH steel laminate inductors:
http://www.parts-express.com/pe/show...number=269-148

by critofur on 04-26-2010 at 08:05 PM
I've just added a new Album here: The Tiny MTMs
They were built (sans crossover) in one day, well, except it's technically two days, since I worked past midnight 
I've got university midterm exams this week - so - not sure when I'll have time to measure them then get to crossover modeling...
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