rambronco

Whats up fellas, I wanted to get some input on what you guys think. I have 4 Sundown audio SD-10's that will be pushed bey a Planet audio BB2400.1. After doing some measurements I dont think I can get optimal box volume for all 4 in a ported box so I was thinking of dropping it to 3 of them in a ported enclosure, that would raise the impedence a bit so I figure about 1500 watts. Or I can run all 4 of them in a sealed box and give them about 2K watts. I am more concerned with the lower frequencys which is why I am thinking of giving up cone area and wattage to be able to tune lower. Do you guys think with the extra cone area and wattage that I could get as much low frequency output with the sealed setup? Thanks RB

Win ISD beta ya im familiar. Im not trying to argue but your first post was kinda in your face. Done now.

I haven't a clue what you said and I highly doubt you do either. Well we started talking in laymens terms and you made it a point to show everybody how knowledgeable you are when referencing the F3 of a given enclosure. Which in laymens terms refers to a frequency where the enclosure starts to roll off and is at -3db in the curve. Now Since I'm so ignorant ill use small words so you can follow along. Below tuning frequency a ported enclosure will roll off at 24db/octave whereas a sealed rolls off at 12db, therefore below tuning sealed is king. See that wasn't so hard was it. RB

Quentin, I don't necessarily agree with your response, a lot of that depends on tuning frequency and I know you mentioned "most ported" in your statement but the statement falls flat on its face when go below tuning frequency where below F3 of the ported, the sealed would basically double the output of the ported. That being said it is hard to make up 3db in the desired frequency range with one extra woofer and 500 watts in the system described above. RB

Eggy, I agree that seal can go lower, but you give up the effiency bump above tuning frequency of a ported. I am leaning towards sealed myself. Thank you for the replies keep them coming. RB

Active would refer to the x-over. it uses an electronic x-over either a stand alone, or dsp, or the HU to handle the x-over duties. And instead of the amplifier channels running a mid and tweeter usually each channel runs a single speaker, although there are variations of that. A passive system would be what using the supplied x-overs that come with the component sets or similar.