Double BR vs BR?

Brisso57 · 27th March 2008, 11:27 PM

I'm interested to know opinions about the merits of double bass reflex cabinets versus bass reflex.

If a driver is suited to a BR cabinet, can anything more be gained by a DBR cabinet?

I know they are obviously more complex to build - but not much, really.

If you can indeed get better and lower bass from a DBR, what is the trade-off? (Nature nearly always has a trade-off!)

cheers

Doug

marchel · 27th March 2008, 11:41 PM

IMO, double BR is better, Because the box is tuned to 2 different frequencies, Below and above the FS of the driver, Therefore It has more control of the driver's motion over wider frequency range. Not only that, Double BR is less sensetive to driver's parameter changes, As driver changes mechanical qualities over time.

The drawback of DBR is that it is larger than a BR.

Brisso57 · 28th March 2008, 12:34 AM

If you have a driver suited to a BR cabinet, and a BR design (dimensions and port), is there a rule of thumb for conversion of that design to a DBR?

Anyone?

Doug

GM · 28th March 2008, 02:30 AM

Depends: http://www.claudionegro.com/ and in the menu click 'projects', 'speakers', 'DCR'........

GM

27th March 2008, 11:27 PM	#1
Brisso57 diyAudio Member Join Date: Sep 2005 Location: the leafy west of Brisbane	Double BR vs BR? I'm interested to know opinions about the merits of double bass reflex cabinets versus bass reflex. If a driver is suited to a BR cabinet, can anything more be gained by a DBR cabinet? I know they are obviously more complex to build - but not much, really. If you can indeed get better and lower bass from a DBR, what is the trade-off? (Nature nearly always has a trade-off!) cheers Doug __________________ A speaker-builder's parable: "That burned down, fell over, then sank into the swamp. But the fourth one stayed up. And that's what you're going to get, Lad, the strongest castle of all."

28th March 2008, 12:34 AM	#3
Brisso57 diyAudio Member Join Date: Sep 2005 Location: the leafy west of Brisbane	Conversion rule of thumb? If you have a driver suited to a BR cabinet, and a BR design (dimensions and port), is there a rule of thumb for conversion of that design to a DBR? Anyone? Doug __________________ A speaker-builder's parable: "That burned down, fell over, then sank into the swamp. But the fourth one stayed up. And that's what you're going to get, Lad, the strongest castle of all."

28th March 2008, 02:30 AM	#4
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Depends: http://www.claudionegro.com/ and in the menu click 'projects', 'speakers', 'DCR'........ GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

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27th March 2008, 11:41 PM	#2
marchel diyAudio Member Join Date: Nov 2007	IMO, double BR is better, Because the box is tuned to 2 different frequencies, Below and above the FS of the driver, Therefore It has more control of the driver's motion over wider frequency range. Not only that, Double BR is less sensetive to driver's parameter changes, As driver changes mechanical qualities over time. The drawback of DBR is that it is larger than a BR.

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