My transmission line subs 4-21" - Page 3

ajhockett · 8th April 2010, 06:43 PM

here is the spec sheet

BP1Fanatic · 8th April 2010, 07:58 PM

http://www.pyleaudio.com/manuals/PDW21250.pdf

ajhockett · 8th April 2010, 08:15 PM

In the spec sheet that u just posted it says the useable range is from 45-1.7khz... They play real nice down low. Maybe it's the transmission line enclosure... Any thoughts?

hornloaded · 8th April 2010, 11:37 PM

In the PDF it says the xmax is 9.0mm. They dont specify if that is one way or peak to peak though.

ajhockett · 8th April 2010, 11:40 PM

its one way

hornloaded · 9th April 2010, 12:53 AM

Well 9mm one way is pretty darn good then. I bet 4 of those are devastatingly loud in your room!

ajhockett · 9th April 2010, 01:01 AM

i had electrician over this morning to pull another circuit for my sub amp(s) they didnt believe me that I was popping the one that was already there so i had to show them. its much more powerful now. I just ordered 3 more of these subs, 1 to replace one that I fried today, and 2 to make 2 more TL subs with. That will put me at 6 total. ill be happy there. (for now)

Andrew Eckhardt · 9th April 2010, 01:34 AM

Those two spec lists tend to indicate that Pyle has trouble making these woofers for any specific purpose. According to one sheet it's a pretty cool sub driver and according to the other it's not good for anything but 70's disco, Really Loud.

ajhockett · 9th April 2010, 01:38 AM

Which is which?

Andrew Eckhardt · 9th April 2010, 01:45 AM

Well usually anything with a qts well below 0.2 has most of the coil already in the gap and a very large magnet to cone ratio. This speaker has about a moderate amount of magnet, and if it really has 9mm of xmax the generic specs from the site are realistic sounding, and you'd have a broadly useful sub driver to design with. Maybe the extremely low Q "version" would work OK in a horn, I have about zero experience with that, but it usually means you're going to get a -3dB point well above Fs for any other type of box, although it might be darned efficient.

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8th April 2010, 07:58 PM	#22
BP1Fanatic diyAudio Member Join Date: Jan 2009 Location: Columbus, Ohio	http://www.pyleaudio.com/manuals/PDW21250.pdf

8th April 2010, 08:15 PM	#23
ajhockett diyAudio Member Join Date: Apr 2010	In the spec sheet that u just posted it says the useable range is from 45-1.7khz... They play real nice down low. Maybe it's the transmission line enclosure... Any thoughts?

8th April 2010, 11:37 PM	#24
hornloaded diyAudio Member Join Date: Aug 2008	In the PDF it says the xmax is 9.0mm. They dont specify if that is one way or peak to peak though.

8th April 2010, 11:40 PM	#25
ajhockett diyAudio Member Join Date: Apr 2010	its one way

9th April 2010, 12:53 AM	#26
hornloaded diyAudio Member Join Date: Aug 2008	Well 9mm one way is pretty darn good then. I bet 4 of those are devastatingly loud in your room!

9th April 2010, 01:01 AM	#27
ajhockett diyAudio Member Join Date: Apr 2010	i had electrician over this morning to pull another circuit for my sub amp(s) they didnt believe me that I was popping the one that was already there so i had to show them. its much more powerful now. I just ordered 3 more of these subs, 1 to replace one that I fried today, and 2 to make 2 more TL subs with. That will put me at 6 total. ill be happy there. (for now)

9th April 2010, 01:34 AM	#28
Andrew Eckhardt diyAudio Member Join Date: Nov 2005 Location: PA	Those two spec lists tend to indicate that Pyle has trouble making these woofers for any specific purpose. According to one sheet it's a pretty cool sub driver and according to the other it's not good for anything but 70's disco, Really Loud.

9th April 2010, 01:38 AM	#29
ajhockett diyAudio Member Join Date: Apr 2010	Which is which?

9th April 2010, 01:45 AM	#30
Andrew Eckhardt diyAudio Member Join Date: Nov 2005 Location: PA	Well usually anything with a qts well below 0.2 has most of the coil already in the gap and a very large magnet to cone ratio. This speaker has about a moderate amount of magnet, and if it really has 9mm of xmax the generic specs from the site are realistic sounding, and you'd have a broadly useful sub driver to design with. Maybe the extremely low Q "version" would work OK in a horn, I have about zero experience with that, but it usually means you're going to get a -3dB point well above Fs for any other type of box, although it might be darned efficient.