T-line Ideas (visuals)

[aznboi3644]

I see only 3 maybe 4 variations...I'd say they sound like crap unless tested. I'm sure people have experimented with these types of ideas...but the more intricate the design the harder it is to sound the way you want.

[quakecitystudio]

Thanks for your responses. I will post a larger picture tomorrow. These are spur of the moment ideas. I know that some will work better than others. But, I at least wanted to try and cover other aspects like your typical sealed, ported, iso setup variations.

[quakecitystudio]

I tried to experiment with the idea of the port firing into the t-line, and then the port being away from the t-line. Because in essence, you take the t-line away and you have a ported box. So you could tune them individually.

some of you guys might have a block on photobucket or so, like on a work computer.

Edited May 19, 2009 by quakecitystudio

[Boon]

I tried to experiment with the idea of the port firing into the t-line, and then the port being away from the t-line. Because in essence, you take the t-line away and you have a ported box. So you could tune them individually.

some of you guys might have a block on photobucket or so, like on a work computer.

Part of the point of a T-line is to improve the phase between the front and rear waves of the woofer by forcing one of them to travel a long long way before it combines with the other. What's the point in combining the front and rear waves then sticking them in a great big line together? What you have that way is a terrible 6th order bandpass.

[korey_hofer]

they look good but I see alot of testing to get most to work the 4th order like one would probably work pretty well

[quakecitystudio]

Part of the point of a T-line is to improve the phase between the front and rear waves of the woofer by forcing one of them to travel a long long way before it combines with the other. What's the point in combining the front and rear waves then sticking them in a great big line together? What you have that way is a terrible 6th order bandpass.

I respect your response. It could be terrible if it wasn't properly tuned. It's the same way with putting a ported box of multiple subs in the bed of a truck that fires through a blow thru port into the cabin of the truck. You have both front and rear waves firing towards the same port into the cabin. But, it works when it's properly tuned. So why couldn't you do the same with a t-line, it's only ideas.

[Forevrbumpn]

My favorite I have built and used on daily is the bandpass tline

incredible sound

[Boon]

I respect your response. It could be terrible if it wasn't properly tuned. It's the same way with putting a ported box of multiple subs in the bed of a truck that fires through a blow thru port into the cabin of the truck. You have both front and rear waves firing towards the same port into the cabin. But, it works when it's properly tuned. So why couldn't you do the same with a t-line, it's only ideas.

With a blowthrough the port into the cabin acts as a very high tuned front chamber on a 6th order bandpass. It's either a tiny chamber with a huge port or a larger chamber with a very very short port, either way you end up with it being so high-tuned that it doesn't affect the subs. All you really get is a little bit more loading.

As soon as you put a T-line on the front of it you have the subs and ports firing into a low tuned line. You're going to end up with an extremely peaky box because there will only be a few frequencies when the phase of the front and back waves aligns AND is at a frequency that will work nicely in the t-line.

You're also losing the traditional efficiency of the T-line because the box + port limits the cones excursion. So you get more power handling but much less efficiency which basically defeats the purpose.

The again I know Foreverbumpn has had good results with bandpass lines (Using a sealed enclosure for the back of the sub IIRC)

[aznboi3644]

here's a little something different I designed for a customer. Its a t-line but with a port at the end of the line...takes on some voight pipe principles.