Home » Audio » Speaker » Bandpass subs
Re: Bandpass subs [message #17314 is a reply to message #17174] Sat, 08 January 2005 13:36 Go to previous messageGo to next message
Earl Geddes is currently offline  Earl Geddes
Messages: 220
Registered: May 2009
Master
There is absolutely no reason why a bandpass system has to be high Q - "single note". If it is then you don't know how to design one. They can be nearly any bandwidth that you want - just like the dual ported design.

And as far as there "transient response" - please! No bandpass subwoofer system has any transient response. That's why its called a "subwoofer". The transients occur somewhere else.

Re: Increased output and small size [message #17327 is a reply to message #17166] Sun, 09 January 2005 14:00 Go to previous message
Earl Geddes is currently offline  Earl Geddes
Messages: 220
Registered: May 2009
Master
Consider this.

A bandpass system has its front cavity tuned to be centered on the speakers resonance when placed in its rear enclosure. The front box size and port dimensions determine the system Q. Thus the bandpass system has substantial output below the speakers resonance! In any direct radiating system the system never has output below the systems resonance.

Bandpass system play louder and lower than any direct radiating system, but have limited bandwidth. In a subwoofer this is just what we want. All this talk about transient response, bandwidth, etc. is misguided when talking about a bandpass system because bandpass systems are INHERENTLY low bandwidth, slow transient response systems. But they do what they do better than a direct radiator ever can. And when properly mated with a mid bass system can work very well indeed.


Previous Topic: Light Show from Speaker Port
Next Topic: Technics 20PW-49S Coaxial Drivers
Goto Forum:
  


Current Time: Thu Oct 31 18:22:59 CDT 2024

Sponsoring Organizations

DIY Audio Projects
DIY Audio Projects
OddWatt Audio
OddWatt Audio
Pi Speakers
Pi Speakers
Prosound Shootout
Prosound Shootout
Miller Audio
Miller Audio
Tubes For Amps
TubesForAmps.com

Lone Star Audiofest