What constitutes a good speaker for a line array?

joeybutts · 26th August 2009, 09:40 PM

I have a bunch of 2" speakers (12) from a Mac speaker system doing nothing and no worth using for anything really since I don't own a Mac and just thought today that maybe I could use them for a line array Center channel for my HT for right now. No matter what I am going to try them but was wondering what everyone might think of this.

The way they are used right now is in a very small enclosure.... maybe .1 cubes per speaker, I haven't measured yet. I'm sure there is close to nil chance of getting T/S on these little guys. could these be ported? Is it worth it? Is the line array worth it with 12 of them? Let me know your thoughts.

MisterTwister · 27th August 2009, 02:18 AM

just line them up and wire in series/parallel for 4-8 ohm (whatever your amp can handle)
maybe you'll like them without any modifications

joeybutts · 27th August 2009, 02:39 PM

That's why I was planning on building it no matter what

How would i need to wire it to get 6 or 8 ohm?

joeybutts · 27th August 2009, 02:41 PM

That's why I was planning on building it anyway

Thanks Twister.

How would i need to wire these bad boys to get a 6 or 8 ohm load?

MisterTwister · 27th August 2009, 03:59 PM

you need to find out ohm value of one speaker.
usually it is written on back of the magnet.
http://www.bcae1.com/spkrmlti.htm

joeybutts · 27th August 2009, 05:28 PM

oh yeah....duh.

H3nry · 28th August 2009, 01:07 AM

If these are the H-K speakers in the plastic balls, they are rated 8 Ohms. They aren't bad. 1" vented voice coil driving a 1.5" inverted aluminum dome with rubber surround.

If you're using all 12 in a center channel, wire up 3 groups of 4 in parallel (2 Ohms), and wire the 3 groups in series for 6 Ohms.

joeybutts · 28th August 2009, 01:43 AM

Thanks Henry! they are the speakers in the plastic balls and they do sound quite nice for their size.

planet10 · 28th August 2009, 02:53 AM

Do you mean the Chrystal Spheres with the JBL driver? JBL got the patents, HK used it as well. Newer ones have Foster drivers in them.

with a dozen it would be interesting to try packing them into a dodecahedron.

dave

H3nry · 28th August 2009, 04:04 AM

Quote:

Originally Posted by planet10

with a dozen it would be interesting to try packing them into a dodecahedron.
dave

I had a similar idea (see thread on point source array) and everybody's been telling me it won't work. They're probably right. That's seldom stopped me in the past, tho...

See the sub that goes with the cube:

http://www.cubeowner.com/forums/inde...howtopic=13516

26th August 2009, 09:40 PM	#1
joeybutts diyAudio Member Join Date: Mar 2008	What constitutes a good speaker for a line array? I have a bunch of 2" speakers (12) from a Mac speaker system doing nothing and no worth using for anything really since I don't own a Mac and just thought today that maybe I could use them for a line array Center channel for my HT for right now. No matter what I am going to try them but was wondering what everyone might think of this. The way they are used right now is in a very small enclosure.... maybe .1 cubes per speaker, I haven't measured yet. I'm sure there is close to nil chance of getting T/S on these little guys. could these be ported? Is it worth it? Is the line array worth it with 12 of them? Let me know your thoughts.

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27th August 2009, 02:18 AM	#2
MisterTwister diyAudio Member Join Date: Feb 2006 Location: usa Blog Entries: 1	just line them up and wire in series/parallel for 4-8 ohm (whatever your amp can handle) maybe you'll like them without any modifications

27th August 2009, 02:39 PM	#3
joeybutts diyAudio Member Join Date: Mar 2008	That's why I was planning on building it no matter what How would i need to wire it to get 6 or 8 ohm?

27th August 2009, 02:41 PM	#4
joeybutts diyAudio Member Join Date: Mar 2008	That's why I was planning on building it anyway Thanks Twister. How would i need to wire these bad boys to get a 6 or 8 ohm load?

27th August 2009, 03:59 PM	#5
MisterTwister diyAudio Member Join Date: Feb 2006 Location: usa Blog Entries: 1	you need to find out ohm value of one speaker. usually it is written on back of the magnet. http://www.bcae1.com/spkrmlti.htm

27th August 2009, 05:28 PM	#6
joeybutts diyAudio Member Join Date: Mar 2008	oh yeah....duh.

28th August 2009, 01:07 AM	#7
H3nry diyAudio Member Join Date: Aug 2009 Location: Austin, TX	If these are the H-K speakers in the plastic balls, they are rated 8 Ohms. They aren't bad. 1" vented voice coil driving a 1.5" inverted aluminum dome with rubber surround. If you're using all 12 in a center channel, wire up 3 groups of 4 in parallel (2 Ohms), and wire the 3 groups in series for 6 Ohms.

28th August 2009, 01:43 AM	#8
joeybutts diyAudio Member Join Date: Mar 2008	Thanks Henry! they are the speakers in the plastic balls and they do sound quite nice for their size.

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