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Published on Aug 17, 2009
This is a simple video to show off my two Roadmaster VR3 12" subwoofers (40W rms, 400 max), Advent AM848 8" subwoofer (100W rms, 250 max), and two Dual DS Series 6"x 9" (60W rms, 120 max). The volume knob was between the 9:00 and 10:00 position, where one of the biggest jumps on the knob is. The two Roadmasters and the two Duals were both sharing a channel with their twin, becuase my receiver is only stable to 8 ohms, and they are 4 ohm speakers. The two VR3's and the Duals were each sharing about 20W, and the Advent was getting about 40W, but it oddly gets less excursion when both of it's voice coils are being used.
BTW, the song is Krazy by Pitbull
The VR3's actually have a very clean free-air, and have a decently low Fs, and you can actually hear the bass of their free-air downstairs (which BTW is very, very clean and deep sounding). I'm pretty sure they are a good candidate for their 2.1 cu. ft. @ 20 Hz enclosure, especially for their low $20 each pricetag. BTW I bought them from Wal-Mart, and they're sure not SPL subs, but they sure are deep and clear and have pretty nice xmax for their price.
Once I figure out how to take out the board splitting the already low cu. ft. box into a small chamber for each sub, it'll be at 2.1 cu .ft., with a foam board flared square port. The port is 2 9/16" by 3 1/8", and 26" long excluding the flare. If I seal the port nicely, my new HT sub should hit 20 Hz without any problems (BTW this will be the box for the 2 12's). I got the box for free because my neighbor had it sitting out in front of their house in their driveway, and they didn't want it so after 10 minutes of waiting for someone to answer the door they gave me the box for free. So I can't really complain.
The Advent AM848 has a twin that I securley glued into a speaker box that I made in woodshop in 7th grade. I didn't show it in the video because I ran out of channels on my receiver, with this one sub getting two channels being a dual 8 ohm sub. I have a feeling that if this sub had some proper surrounds, and not this mess of duct tape that makes way too much noise for actual use, it could have been use for some SPL racing, as this sub was given to me with torn surrounds, with the owner claiming they were broken. They have a stiff spider, and with a stiff foam surround (they have a powerful coil) they can probably push some serious air. And it was not bottoming out, all that noise was from the surrounds.
And last are the two Duals. Their excursion is nice when their free-aired, but when their in a box, the bass is mostly distorted and not very clean or loud at all. Still, they make some nice sound, but a crossover would be nice, to relieve them of their too difficult duty that we call bass. I found them at Fry's for $4.90, and they came in a giant shrink wrap package. At $2.45 each, that's not too bad at all. I'm sure they can get loud if they have a sub handle the lows.
Thank you if you read all the way down here, but if you skipped down here, well, yeah. Please excuse any typos, because it's hard to avaoid them after typing this much : ).