Ideas for sub(s)..

[DigitalJunkie]

Hey guys,I'm looking for ideas for a small sub to build with a pair of 8-inch drivers.
I was thinking maybe something isobaric.Or something for the car,or a powered sub(s) for the living room.. I dunno,and don't really care,I got the drivers cheap ($5 each) a while back,and figured I'd finally try to put them to use somehow,they sounded pretty good in some small boxes I fudged them into after I got them,just for a test.
Maybe one of those cheap dual bandpass plexi car boxes would work okay?

Any suggestions for a box design would be great. 😉


Here's what I know about the speakers..(what it says on the rear.)

Linear Series (anyone ever heard of these?)
4 ohms 140W max
Fs: 50hz
SPL:87dB
QTS: 626
Vas: 1.28
Model LSW084
"optimized for small sealed box and 1 to 1 ratio small bandpass enclosures"

 

[BillFitzmaurice]

Your drivers aren't suitable for subs. A sub generally operates in the bandwidth from about 20Hz to 80 Hz; your drivers,with an fs of 50 Hz, aren't capable of going low enough.

 

[Stocker]

For the house, surely. For the car, you might just lose the bottom of the bottom end. I would think if you put it in a biggish sealed enclosure in a small car, it -may- be passing fair or better.

 

[simon5]

You could do a 80 liters ported box, but the most you can get is to tune it at 40 Hz to be flat in room to 35 Hz.

 

[DigitalJunkie]

Yea,I don't expect much low freq output from these little 8-inch guys,but I figured I'd give them a go,since they've been sitting around collecting dust. They sounded pretty decent in some random 8-inch boxes I stuck them into to listen to them..seemed to have decent low end response,for an 8-inch..
Might an isobaric/k setup would help lower the resonance?
Maybe something for a PC setup?
I've got the itch,and these are sitting here,i'm ready to go,just need ideas.

I just had another thought,I could use some woofers in the car,if they'll fit in the rear deck (I'll have to cut holes.) I dunno if it's wide enough.
I've already got a set of mid/midbass drivers,and tweeters,and a sub.
Any suggestions for a crossover freq for these?

 

[simon5]

Isobaric will not lower the resonance, but it could do a small PC subwoofer.

If you go isobaric, then in a 50 liters box tuned to 40 Hz, with a 250W plate amplifier to power both, output in the 112 dB range, with a -3 dB point around 33 Hz.