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Dayton Audio RSS390HO-4 15" Reference HO Subwoofer 4 Ohm
I am building a 3.5 cu. ft. sealed box and need to know how much polyfill I need, if any? Thanks in advance.
We recommend about a half pound per cubic foot of airspace as a good starting point.
Date published: 2014-07-28
I have a 2.7 ft3 with a 4 inch precision flared port, using the whole length. Is that what this really needs. What will the tuning be. And how many watts will make it use all the xmax? This is in a car.
In that volume with the full port length it will be tuned to about 27 Hz. You could shorten the port to 10" for a tuning frequency of 33 Hz. Xmax is not reached with 800 watts until 15 Hz.
Date published: 2014-07-03
What screws would you recommend to mount this driver to a double thick 3/4" MDF baffle?
You would use a 1/4 inch or M6 screw and T nuts for that but unfortunately we do not have one long enough. Our mounting kits are 1-1/2 inches long which would come up a little short.
Date published: 2013-11-15
F3 of 3Hz
Hi all,I don't claim to be a sub desiger expert, but can this driver really do an F3 of 3Hz in a 1 cubic foot sealed box?That seems incredible! If its true, then I'm certainly going to get 1 or 2.
I'm sure with enough EQ applied at a very limited volume level you can get an F3 that low but there is no reason. In 1 cubic foot, this woofer has an F3 of roughly 50 Hz which is ideal for most car audio applications.
Date published: 2013-10-14
What is the recommended enclosure sizes with displacement?
Hello, It's been mentioned that these would work great in a 3 cf enclosure per sub, and Russell also mentioned you could port the 3 cf enclosure using two 3"x16" ports; is this optimum... starting with the 3 cf net enclosure then putting in the .21 cf of woofer and .13 cf of ports to have a net enclosure of 2.66? Does that still have the tuning at around 28hz, or if you were building, would you add in the displacement of the driver and ports? It's always been my experience that if you can, you want to be as specific as possible when setting your vent vs. enclosure space calculations...Thanks!!
A 3 cubic foot net enclosure with two 3"x16" ports will yield a tuning frequency of 28 Hz. The driver and port displacements really will only change a tuning number by no more than a few Hz which is hardly audible. The volume never needs to be 100% accurate.
Date published: 2013-01-19
Will this sub do good in a 1.5 cf sealed box with 600 watts?Looking to replace my type r that hates being sealed
You should run the T/S parameters through a box calculator. If you just try to put another driver into an existing box - you will compromise performance. This sub is designed for small boxes - but the PE speaker builder software does not list the correct box volumes - so you will need to use a calculator on your own. A total Qts of 1.0 will give a bump in the bass. .707 is flat, and .5 is critical for audiophiles. As for the power - just make sure you have "Clean" power. Clipping is what melts voice coils. And if you are in a small box with a plate amp - get the most power you can as it will have built in EQ to help flatten repsonse due to the small box. For mobile - the power ratings are all misleading - go for a reputable brand mono amp designed for bass that is stable to 2 ohms and change your car battery !!!
Date published: 2014-07-03