What is the name of this design

[maxolini]

Guys,
What is the name of this design
Bandpass?

The CSA of the mouth opening affects what part of the freq response

 

[Booger weldz]

A qw pipe with the driver at the pressure and velocity end of the resonances.

 

[LORDSANSUI]

It's a Tapped Horn,

This design is based on the MTH design where the driver is placed horizontally.

I think it was Brian Steele that came with the idea to move the driver to the horizontal position to avoid suspension sagging. Check attachment.

 

[LORDSANSUI]

Correction: vertical position to avoid suspension sagging

 

[maxolini]

If you sim in HR, S5 is the CSA of the exit right? So I can see how changing the opening size will affect the output response

 

[planet10]

A tapped pipe quarter-wave. You will find many threads on this subject. Maximizes potential levels at teh expense of bandwidth.

Another devolpment/invention from Tom Danley.

dave

 

[Booger weldz]

Do these ‘really’ sound different?

It moves Fb a little(according to the dats impedance measurement), but it is audibly ‘quieter’ in the smaller exit version.

what if the exit was on the other side of the box?

 

[maxolini]

A tapped pipe quarter-wave. You will find many threads on this subject. Maximizes potential levels at teh expense of bandwidth.

Another devolpment/invention from Tom Danley.

dave

Great! I don't mind bandwidth! There is the tendency of users who want their subs to go nice up to 200 or even 300Hz, cause they are using tiny satélites as tops, I don't mind 30 to 80 or 30 to 90 , I can cross my tops lower or use kickbins.

 

[GM]

Then have the option of using higher Qt drivers: assuming 30*0.81 = ~23.4 Hz Fs, then 2*23.4/80 (90) = ~0.585 (0.52) Qts'.