Front or rear port placement?

[LightBit]

Thanks for your response.
The question of using the rear sound waves is important however, for TL speakers since the speaker is designed specifically to use the rear sound waves to reinforce the sound waves coming from the front of the speaker. What is the difference between the two designs? Clearly a TL design is a taller box, yet both have ports. How much larger must a box be to use its rear waves to reinforce its front waves?

It is same with bass reflex. MLTL additionally takes advantage of standing waves inside the box.

 

[LightBit]

Amazingly, you get much deeper bass from a smallish box.

You mean louder?

 

[lotsmorebetter]

Thanks for the info and the history lesson. Does that meant that the very large TL and folded horns have that effect, that the bass is a little behind? And if small boxes have bass that seems to be up to speed, at what length of the helmholtz does the perception of speed decay?

 

[system7]

I don't know WHAT I mean half the time. 😀

As a mathematician at heart, it's certainly important to define everything before you make a statement.

Here we see slow bass reflex versus some sort of fast (foot-tappin') closed box.

The double-peak impedance reflex certainly seems to deliver more bass in the main range. TBH, I like both approaches.

IMO, if you have a big magnet Qts= 0.38 reflex driver, that is what you do. If your driver is nearer small magnet closed box Qts= 0.5, that is what you then do.

We'd be silly to imagine there is anything like a perfect speaker. All is compromise. 😎