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Dayton Audio RS180-8 7" Reference Woofer
I wanted to build a sealed box design with this woofer paired with the PT2C-8 planar tweeter. question is what size box should I build? and what would the correct crossover frequency be for these two drivers to match well?
The sealed box for this woofer is pretty small at about 0.16 cubic feet, which will only get you to about 90 Hz or so. If you want any bottom end from these I would recommend vented in about 0.5 cubic feet tuned around 50 Hz. A good crossover would be 3kHz second order.
Date published: 2014-07-07
What would be the correct sealed enclosure volume for this driver?
I am going to build a set of boxes to hang on my porch. I was thinking about a MTM design, I was wondering if it would be better to have one chamber for each driver or both drivers share a chamber? I am going to use DC28F-8 tweeters.
I would recommend .3-.4 cubic feet per woofer. This will provide an in-room response into the low 40's. You do not need separate chambers for each woofer although cabinet bracing is recommended.
Date published: 2013-08-01
What volume would this take up in the box?
I assume what volume do you add to the box to compensate for driver displacement. Fogiving the thickness of the baffle - your major concern is the size of the magnet. For the sake of conservatism, assume 2" thick x 7" diameter. Using PiR2 (Pi R Squared) - you can figure an approximation that is adequate for anything outside of laboratory measurement. For more accurate numbers - measure an actual driver, or buy a "spare" as we call in design - a "Sacrificial driver" that is broken and used for routing. In this case - you would dip it in water to see how much volume was displaced - which would be the most accurate.
Date published: 2013-11-04
For Celestion 5?
Would these be a good replacement for damaged Celestion 5 woofers? The size is about right.
It's a great driver - check the T/S parameters with a box calculator to see if the box volume is close - or look at speaker building, woofer selection guide on this site
Date published: 2012-06-11
Are these drop in replacements if you need to replace the woofer in a design that uses the previous Rs180-8 shielded?
One of my woofers went bad and I need to know if I have to seek out a shielded rs180 or not. Will crossover mods be necessary?
The unshielded Reference Series drivers are designed to be drop-in replacements for the shielded Reference Series drivers. No crossover adjustments should be needed.
Date published: 2012-05-04