vifa 2-way build up

Hadamona · 17th August 2005, 10:24 AM

I probably don't have to tell you what drivers I'm using, they've got to be 2 of the most popular from vifa...

This is my first attempt at anything like this. I hope this crossover works okay, because I havn't tried it yet :P

Andy G · 17th August 2005, 01:07 PM

That x-o is pretty close to the one Dave B uses in the tapered pipes he build..

Problem is that the P17WJ will behave rather differently in a vented or sealed box (which is yours, hard to tell from pics)

You will probably find a loss of midrange definition (the P17 in a smallish box) and bass, because of the different bass response over what that x-o would provide in the pipes.

tweaking will almost certainly be required!

rabbitz · 17th August 2005, 01:12 PM

Ah... a series xo.

Just make sure that the cap and inductor values are calculated using the actual impedance at the crossover point and not nominal values and that you add the 4R7 to the tweeter's resistance at that point.... remember that it's running in series and does not function like an L-Pad.

Andy G · 17th August 2005, 01:29 PM

Ah ! The lad from Valentine !

You really must call by sometime, have a listen to these line arrays !!!

rabbitz · 17th August 2005, 02:15 PM

Not so much a lad, but an old fart

I'll send a PM and we'll organise an appointment and an audience with your worship. These the Gumby?

Hadamona · 18th August 2005, 10:23 AM

The speakers are now built. I must say, they sound very nice. Bass response is lacking to a large extent (to be expected). I do however have an active sub to fill the low frequencies.

All in all, extremely pleased. I don't think I could have bought pre-made speakers or a kit for what it cost me to build a pair (AU$360)

Even though this is my first set of speakers I have made.. it would make an excellent first project for anyone wanting to build a inexpensive set of 2-ways..

Should also mention, this forum has a lot of information that I used to make these 2-ways.

Andy G · 18th August 2005, 10:40 AM

Well done !!!

Great to see someone using a series x-o !!!

jmateus · 18th August 2005, 12:14 PM

YES, indeed!

rabbitz · 18th August 2005, 12:18 PM

Great stuff and you've got the bug now.... there goes all your money and spare time

Siddharth · 18th August 2005, 02:47 PM

Neat job. What's the dimension of the box? What port size and dia?

--
Sid

17th August 2005, 10:24 AM	#1
Hadamona diyAudio Member Join Date: May 2004 Location: Brisbane	vifa 2-way build up I probably don't have to tell you what drivers I'm using, they've got to be 2 of the most popular from vifa... This is my first attempt at anything like this. I hope this crossover works okay, because I havn't tried it yet :P

18th August 2005, 12:14 PM	#8
jmateus diyAudio Member Join Date: Mar 2003 Location: US, New Jersey	series crossover YES, indeed! __________________ JLH 2005, Cyrus and so on...

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17th August 2005, 01:07 PM	#2
Andy G diyAudio Member Join Date: Apr 2002 Location: Newcastle, Australia	That x-o is pretty close to the one Dave B uses in the tapered pipes he build.. Problem is that the P17WJ will behave rather differently in a vented or sealed box (which is yours, hard to tell from pics) You will probably find a loss of midrange definition (the P17 in a smallish box) and bass, because of the different bass response over what that x-o would provide in the pipes. tweaking will almost certainly be required!

17th August 2005, 01:12 PM	#3
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Ah... a series xo. Just make sure that the cap and inductor values are calculated using the actual impedance at the crossover point and not nominal values and that you add the 4R7 to the tweeter's resistance at that point.... remember that it's running in series and does not function like an L-Pad.

17th August 2005, 01:29 PM	#4
Andy G diyAudio Member Join Date: Apr 2002 Location: Newcastle, Australia	Ah ! The lad from Valentine ! You really must call by sometime, have a listen to these line arrays !!!

17th August 2005, 02:15 PM	#5
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Not so much a lad, but an old fart I'll send a PM and we'll organise an appointment and an audience with your worship. These the Gumby?

18th August 2005, 10:23 AM	#6
Hadamona diyAudio Member Join Date: May 2004 Location: Brisbane	The speakers are now built. I must say, they sound very nice. Bass response is lacking to a large extent (to be expected). I do however have an active sub to fill the low frequencies. All in all, extremely pleased. I don't think I could have bought pre-made speakers or a kit for what it cost me to build a pair (AU$360) Even though this is my first set of speakers I have made.. it would make an excellent first project for anyone wanting to build a inexpensive set of 2-ways.. Should also mention, this forum has a lot of information that I used to make these 2-ways.

18th August 2005, 10:40 AM	#7
Andy G diyAudio Member Join Date: Apr 2002 Location: Newcastle, Australia	Well done !!! Great to see someone using a series x-o !!!

18th August 2005, 12:18 PM	#9
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Great stuff and you've got the bug now.... there goes all your money and spare time

18th August 2005, 02:47 PM	#10
Siddharth diyAudio Member Join Date: Dec 2004 Location: Mumbai	Neat job. What's the dimension of the box? What port size and dia? -- Sid

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