new 3 way

MisterTwister · 14th October 2009, 06:48 PM

I've started building my first 3 way speaker.
parts-express cabinet
tweeter - Usher 9930-20
mid - CSS FR125, not the latest SR model
woofer - seas H511
why this choice of drivers? I've already had them.
next step - construction of rear chamber for mid.

chris661 · 14th October 2009, 06:52 PM

Wow! Those look good!

Are they symmetrical for left and right?

Chris

MisterTwister · 14th October 2009, 07:03 PM

thanks. second speaker has flipped layout.

Geek · 15th October 2009, 12:48 AM

Nice!

How did you get the rebate so cleanly defined?

Cheers!

tinitus · 15th October 2009, 01:16 AM

nice design

MisterTwister · 15th October 2009, 05:18 PM

well, second baffle is not as clean. I made tweeter cut out 1/16in bigger than needed. I was almost ready to order another baffle, then after painting gap with black marker decided to leave it as it is.

Geek · 15th October 2009, 10:10 PM

Quote:

Originally Posted by MisterTwister

well, second baffle is not as clean. I made tweeter cut out 1/16in bigger than needed. I was almost ready to order another baffle, then after painting gap with black marker decided to leave it as it is.

Ah yes, black marker and black craft foam are friends

Cheers!

J.R.Freeman · 16th October 2009, 01:10 AM

'looks great! The FR125 is a pretty driver. Were it a lady I should like to take her out for dinner!

MisterTwister · 05:29 PM

problem with fr125, it is very inefficient. I made very small chamber for it with duct tape

I tried to make shallow crossover with parts I already have. I noticed previously that shallow crossovers have best imaging.
I assembled only one side and it sounds quite nice. more updates will follow.
http://img233.imageshack.us/img233/4727/29102009.jpg
http://img202.imageshack.us/img202/2...crossover1.gif
http://img177.imageshack.us/img177/3019/3wayimp1.gif
http://img177.imageshack.us/img177/9886/3wayfr1.gif
Also I tried to make series crossover with less components, no success so far.
well, nobody can beat sony in crossover parts count - 2 caps for a 3 way speaker

tinitus · 05:52 PM

Looks ok
But remember that if a woofer plays somewhat loud, it can make the midrange appear more attenuated than it really is
I would try a paralel inductor with a resistor on the mid series cap(highpass)
But your woofer seem to play a lot of midrange, so it hard to say
I take it you are aware that the big 16ohm resistor on tweeter makes the series cap quite large

Regarding FR125 low SPL
Would be tempting to give it a much shorter voice coil fore midrange duty
I think it could be a fantastic midrange driver with 1mm Xmax

btw, I prefer to reverse polarity on midrange

14th October 2009, 06:52 PM	#2
chris661 diyAudio Member Join Date: Feb 2008 Location: Lancashire Blog Entries: 7	Wow! Those look good! Are they symmetrical for left and right? Chris __________________ "Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo My setup: http://www.diyaudio.com/forums/multi...tang-band.html

30th October 2009, 05:21 PM	#9
MisterTwister diyAudio Member Join Date: Feb 2006 Location: usa Blog Entries: 1	problem with fr125, it is very inefficient. I made very small chamber for it with duct tape I tried to make shallow crossover with parts I already have. I noticed previously that shallow crossovers have best imaging. I assembled only one side and it sounds quite nice. more updates will follow. http://img233.imageshack.us/img233/4727/29102009.jpg http://img202.imageshack.us/img202/2...crossover1.gif http://img177.imageshack.us/img177/3019/3wayimp1.gif http://img177.imageshack.us/img177/9886/3wayfr1.gif Also I tried to make series crossover with less components, no success so far. well, nobody can beat sony in crossover parts count - 2 caps for a 3 way speaker Last edited by MisterTwister; 30th October 2009 at 05:29 PM.

30th October 2009, 05:47 PM	#10
tinitus diyAudio Moderator Join Date: Nov 2005	Looks ok But remember that if a woofer plays somewhat loud, it can make the midrange appear more attenuated than it really is I would try a paralel inductor with a resistor on the mid series cap(highpass) But your woofer seem to play a lot of midrange, so it hard to say I take it you are aware that the big 16ohm resistor on tweeter makes the series cap quite large Regarding FR125 low SPL Would be tempting to give it a much shorter voice coil fore midrange duty I think it could be a fantastic midrange driver with 1mm Xmax btw, I prefer to reverse polarity on midrange Last edited by tinitus; 30th October 2009 at 05:52 PM.

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14th October 2009, 07:03 PM	#3
MisterTwister diyAudio Member Join Date: Feb 2006 Location: usa Blog Entries: 1	thanks. second speaker has flipped layout.

15th October 2009, 12:48 AM	#4
Geek diyAudio Member Join Date: Sep 2004	Nice! How did you get the rebate so cleanly defined? Cheers!

15th October 2009, 01:16 AM	#5
tinitus diyAudio Moderator Join Date: Nov 2005	nice design

15th October 2009, 05:18 PM	#6
MisterTwister diyAudio Member Join Date: Feb 2006 Location: usa Blog Entries: 1	well, second baffle is not as clean. I made tweeter cut out 1/16in bigger than needed. I was almost ready to order another baffle, then after painting gap with black marker decided to leave it as it is.

16th October 2009, 01:10 AM	#8
J.R.Freeman diyAudio Member Join Date: Aug 2008	'looks great! The FR125 is a pretty driver. Were it a lady I should like to take her out for dinner!

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