You can most certainly do that if you want to, though it can take a lot of time and money to make a proper passive filter that is able to compete with a more flexible 8" or 10" or 12" fullranger + 15" bass reflex solution using DSP.
If you want to make a 15" + CD (Compression driver) combo, that is well and good, if you want to go this route I would recommend getting a CD + Horn combination that work to maybe 8-900Hz, and to get into this range it starts getting more expensive, and for a CD you NEED to use a passive filter to properly protect the driver.
You are free to do whatever you want, I am merely trying to suggest a solution that will be the most efficient in terms of cost and complexity, the Fane 12" FR does not need a passive filter, you do not need a horn for it, it can handle a bit of abuse, the frequency response can be corrected using DSP which I would strongly recommend no matter what kind of design you decide to build.
If you want to make a 15" + CD (Compression driver) combo, that is well and good, if you want to go this route I would recommend getting a CD + Horn combination that work to maybe 8-900Hz, and to get into this range it starts getting more expensive, and for a CD you NEED to use a passive filter to properly protect the driver.
You are free to do whatever you want, I am merely trying to suggest a solution that will be the most efficient in terms of cost and complexity, the Fane 12" FR does not need a passive filter, you do not need a horn for it, it can handle a bit of abuse, the frequency response can be corrected using DSP which I would strongly recommend no matter what kind of design you decide to build.
@KaffiMann hmm them that do to you think of skiping to make a top box and use somting like this Link I khow that they are 10 inch but they look well build.
Yes I modeled these along with JBL 2269 and the BMS 18N862 with similar response in a 170ltr 30hz box. F3 about 35hz 93db.
@Mica_antrnica yes, very hard to compete with ready built speakers for cheap PA, subs is a different question.
@scholl with "these" being the NERO-18SW1900D?
At any rate, I really like value for the money, so I have 4 x SB Audience BIANCO-18SW450
@scholl with "these" being the NERO-18SW1900D?
At any rate, I really like value for the money, so I have 4 x SB Audience BIANCO-18SW450
@KaffiMann
Yes the 18SW1900D in a 170ltr box tuned to 30hz for an F3 at 31hz to be more exact. a 32hz tune will give a little better group delay. BMS has the best group delay and for some reason I tend toward drivers with larger Vas for lower power listening but they're hard to get in the US. I chose this box size and tuning because I already have the boxes.
Yes the 18SW1900D in a 170ltr box tuned to 30hz for an F3 at 31hz to be more exact. a 32hz tune will give a little better group delay. BMS has the best group delay and for some reason I tend toward drivers with larger Vas for lower power listening but they're hard to get in the US. I chose this box size and tuning because I already have the boxes.
Nice!
I bought the 4 x SW450, and then the 1900D launched shortly afterwards, otherwise I might have gotten those because of the space savings.
The 4 x SW450 might have better fidelity, and they should be more efficient per amount of power, so I am happy either way.
Breaking in the drivers running dipole with small baffles is fun, the boxes are going to be around 230 liters each, going for relaxed roll off with around 20Hz tuning to reduce the need for high pass filters.
I bought the 4 x SW450, and then the 1900D launched shortly afterwards, otherwise I might have gotten those because of the space savings.
The 4 x SW450 might have better fidelity, and they should be more efficient per amount of power, so I am happy either way.
Breaking in the drivers running dipole with small baffles is fun, the boxes are going to be around 230 liters each, going for relaxed roll off with around 20Hz tuning to reduce the need for high pass filters.