I am wanting to build a 3 way active powered speaker for my old roommate. He is a rapper/ producer so he will use heavy bass in his productions. I was thinking of a sealed cabinet to get flat responses from the drivers. Can a 8" car audio subwoofer be used in a monitor? I was thinking of using Dayton RS150P and RST28F with crossover points at 100 Hz and ~1.6 kHz.
Here is the subwoofer's product page. I'm interested because they are very cheap for 2 for $80 on Amazon
Here is the subwoofer's product page. I'm interested because they are very cheap for 2 for $80 on Amazon
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I don't know if you noticed this but your subwoofer has a higher fs (48.9 Hz) compared to your woofer (47.1Hz).
Yes, the 5" can crossover to the HF upto 2kHz well. I'm not sure about the bottom though. Does that have a datasheet?
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With a sealed cabinet, you need might need a subwoofer with much lower extension (fs), or try vented. It should suffice assuming nearfield use (1-2m distance). Alternatively you may apply a Linkwitz transform to reduce the box cutoff frequency provided the Xmax permits.
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You can say that they're identical!
But does that count? Maybe yes, maybe not...
The car sub surely has more X- max and more power in the working band (assigned). For sure it's not a 8 inches because of the different ratio surround/suspension area and the cone, so it might be called a 6-7", I guess.
So, a smaller woofer (5") might be use in conjunction with it.
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I can go vented instead. I was going to go for a bigger sealed box.. I am going to use a DSP to eq once I put the monitors in his room. He will use them near field mostly but crank it listening to final productions.
Well, in that case, make sure that the DSP has a 2nd order highpass at the port tuning frequency.
Sealed would make a good choice. Also make sure there is a good woofer in it. There should be enough output over a wide enough range of frequencies and your amp should be able to drive it, especially allowing for EQ.
AllenB said:
Well, here is a comparison between a sealed and a vented box design, for the driver in question (attached). It's upto the OP to pick one.
Then thechemist needs to know that vented may not be a wise choice when EQing, and that EQing a closed box can give you the same response anyway.
Multiple Small Subs - Geddes Approach
Multiple Small Subs - Geddes Approach
Well, that's true as long as Xmax allows, as I already mentioned earlier. Looking at nearfield reference SPL requirements (85-95dB), there shouldn't be any problems with the sealed method either.