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Old 5th October 2012, 04:16 AM   #11
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Yeah, I know it's a great driver.
Check out the build thread I posted above.
Where did you find it for 6.50?
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Old 5th October 2012, 04:30 AM   #12
opc is offline opc  Canada
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Quote:
Originally Posted by Melo theory View Post
Yeah, I know it's a great driver.
Check out the build thread I posted above.
Where did you find it for 6.50?
I just gave it a read... very cool stuff!

You've got a lot of surface area to play with there.

Are you sure you've got enough power from the two little Daytons? I've got a clean 225W per channel and the amp still clips before the drivers get ugly. Mind you, I'm probably using much more EQ on the bottom end.

As for the $6.50, it's from PE if you buy 100pcs.

Cheers,
Owen
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Old 5th October 2012, 04:50 AM   #13
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Quote:
Originally Posted by opc View Post
I just gave it a read... very cool stuff!

You've got a lot of surface area to play with there.

Are you sure you've got enough power from the two little Daytons? I've got a clean 225W per channel and the amp still clips before the drivers get ugly. Mind you, I'm probably using much more EQ on the bottom end.

As for the $6.50, it's from PE if you buy 100pcs.

Cheers,
Owen
Well, it's eq'd for a 4th order LR at 80 hz. Crossed to an H frame 18" OB sub.
Did you call PE to get that price?
Damn, I would have ordered 100 if I knew! AAAAARRRRGGGG!!!!
I just added 100 to the cart and the cost was 1070.00?
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Last edited by Melo theory; 5th October 2012 at 05:09 AM.
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Old 5th October 2012, 06:16 AM   #14
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Hullo Pontus!

Nice meeting You here!

How´s the RLK project coming along?
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Old 5th October 2012, 07:28 AM   #15
Nissep is offline Nissep  Sweden
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If you build one with 50 speakers/array you could go directly to the manufacturer.
Fountek Fr89ex 3 Inch Full Range Speaker Driver - Buy Full Range Driver,3 Inch Driver,Fountek Driver Product on Alibaba.com

I tried a fountek fr89ex in a tapered transmission line and it is really nice.

Products_Fountek Electronics Co.,Ltd
Klippel test on that driver can be found here:
DIYMA Car Audio Forum
You have to register to that forum to read it.

Their new 2" looks nice if you want to minimise cc.
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Old 5th October 2012, 02:46 PM   #16
tvrgeek is offline tvrgeek  United States
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Thanks for the TC9 tip. I was thinking about trying them. They need a bit of network though, and maybe some cone treatment to deal with the breakup could bring them up to snuff. Like you say, price-performance.
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Old 5th October 2012, 09:26 PM   #17
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My two cents: whenever testing a range of drivers, be sure to take room interaction into account. As a test, measure the driver with the baffle in one location of the room, e.g. 2 feet from side wall, three feet from back wall, microphone centered one meter away, and then perform the same measurement but move the baffle (and microphone) a foot further away from one wall. Both measurements will look quite different, with different sets of peaks and dips, because all of the room reflections will have shifted slightly. Or move the microphone various distances away and see how the peaks and valleys change. It is very hard to isolate the actual performance of the speaker from the room interaction. But since you are comparing many drivers, the job will be easier: for example, if every driver measured has a dip in response at 1.5k, you can basically assume that this is a room reflection and not actual performance.
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Old 5th October 2012, 09:49 PM   #18
opc is offline opc  Canada
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That might be true for RTA, but that is not correct for most speaker measurement programs that use MLS. The whole point of MLS is to remove the influence of the room on your measurements.

The farther you can get from walls and floors, the longer you can set your gate, the better your low frequency resolution will be. MLS is specifically designed to gate the measurement so only the first arrival is used to derive the response.

A properly setup MLS measurement system like Speaker Workshop, Soundeasy (or many others) will measure the same response regardless of the surroundings providing you can meet a basic distance criteria from any adjacent reflective surfaces.

You cannot perform reliable loudspeaker measurements if you're within 2 feet of an adjacent wall as you mention. Doing proper measurements doesn't require a huge space, but you do need to follow some basic guidelines.

Regards,
Owen

Last edited by opc; 5th October 2012 at 09:52 PM.
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Old 5th October 2012, 11:00 PM   #19
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+1 OPC.
There are two methodology here. Impulse capture allows to look in to the individual driver performance aspects such as linear and nonlinear distortions, impulse in time and some others. It will also allow semi anechoic measurements of the conventional speaker system, using merging technique. Issue with the line array is the interference between the drivers and resulting mess because of the multiple driver/impulse capture.
RTA look in to the summed up response, including the effect of the room. RTA will also show very clearly high frequency loss, specific to the linear array configurations.
So, both of these methods are very useful, just in their own way.
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Old 6th October 2012, 12:00 AM   #20
Pnotus is offline Pnotus  Sweden
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Hello everyone! Nice to see this interest for my project/projects.

Tuxedo - Thanks for your advice. Your comments suggest that I am not that far of in reasoning around this. Good to know. I´ve been looking at REW as a useful tool. I´ll probably try to learn how to use this SW.

TVRgeek - Thanks! The book is ordered.

Melo - I´ve got some measurement devices, soundcard and mic already. Now it´s just to learn how to use it...
VERY cool build. I have high expectations for the TC9. Your woodworking skills and patience are inspiring.
I´ve been eyeing the DATS. Wonder if anyone here have one for me to take a look at.

R-carpenter - Excellent breakdown of the softwares for a newbie. Thanks!

OPC - Thanks for good general advice, also good to see that I may already have some serious contenders in this group of drivers. Your arrays look great! As a hobby (very!) carpenter I cannot ignore the routing performed to fit your TC9's in the baffle. Nice! Did you use a jig, free hand routing or CNC?

I've had the Faital Neo up in a test baffle before, not as serious as my current but listened to it alot. It sounds nice, can take some punishment and really has a nice treble tone. I´m really curious about it´s Ferro sister.

By the way - I also model my speaker in SolidWorks or Inventor, even Catia V5 if feel that I have time on my hands.

Regarding the NS3's - I guess I can make them sound in some way. Can use them for listening until next pair is finished. They were just too cheap to leave be.

The Founteks look nice but are a bit expensive. They are also round, and have bit larger surround. But I think that 50USD per driver is a bit too much for me.

Ingvar - min synnerlige trevlige högtalarförsäljare/konstruktör. How very nice to meet you here, your continous updates in your thread at Hififorum have been missed the last couple of weeks. But your 21" subs do look nice!

Well - the Beyma's look at me wanting when I enter the workshop so I hope that I can start in a couple of weeks. Work seems to be getting in the way for freetime fun right now. You´ll be the first to know when they are done.

Nisse - Tack för det! If the price is more humane I could atleast get a pair to try out.

Chaz - good advice. I'll try to take these things into consideration. I'm getting curious about the room so it can be useful to see some graphs on different drivers.

I'll post some pics of the test baffles during this weekend to see if I made any fundamental F-ups.

Thanks so much for your shown interest so far.

/Pontus
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