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Dayton Audio RS180-8 7" Reference Woofer
If i were to put 4 of these in a cabinet arranged in a 2x2 grid layout what would the dimensions of the cabinet need to be to get the best bass and how big would the port ha e to be?
An enclosure with external dimensions of 22"H x 18"W x 12"D with two 3" diameter, dual flared ports that are 9-1/4" long will provide a tuning frequency of 41 Hz.
Date published: 2015-04-22
Why does the 4 ohm version of this driver call for completely different optimal enclosure dimensions than the 8 ohm driver?
The 4 Ohm driver and the 8 Ohm driver have very different Thiele-Small parameters which affect the size of the enclosure.
Date published: 2015-04-03
I was wondering how well these would perform in a 0.56 cubic feet cabinet that is ported? If so, what diameter and length port is best for this application?
This will work well in that volume. I would recommend a 2" diameter, 6-3/4" long port for a tuning frequency of 43 Hz.
Date published: 2014-09-22
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