looking to build first sub - AVS Forum
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post #1 of 23 Old 10-04-2013, 10:07 AM - Thread Starter
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I'm looking to upgrade my sub for my 7.1 system in my room. My sub right now is weak to say the least. I want something that will play down to 20hz. Probably 10 or 12in. My brother and I are going to build it. Since this is my first time could you guys recommend parts and what parts I'll need. Also I have a onkyo txsr607 amp.

Onkyo TXSR607, Mythos 8 Center, Studio Monitor 350's, Klipsch S-10 surrounds, Bic F12 sub

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post #2 of 23 Old 10-04-2013, 10:13 AM - Thread Starter
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Also I think I would like to use a passive radiator instead of a regular port, my center channel uses them. And I like the benefits. If that won't work let me know. Thanks guys

Onkyo TXSR607, Mythos 8 Center, Studio Monitor 350's, Klipsch S-10 surrounds, Bic F12 sub

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post #3 of 23 Old 10-04-2013, 10:27 AM
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good deal!

how big can you go for a cab?

how big can you go for money?

how big can you go for multiples?

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post #4 of 23 Old 10-04-2013, 10:31 AM
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also, what are your main speakers?

how loud do you like to play it, medium loud, or blasting?

how large is the room, roughly?

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post #5 of 23 Old 10-04-2013, 10:52 AM - Thread Starter
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I can probably spend up to $400. Cabinet size isn't a huge issue. I put my equipment first and the rest of the room deals with that lol. Probably 2x2x2 would be a good stopping point though. My main speakers are def tech. Pro monitor 1000s and a mythos 8 center. I like to play it medium to loud. I like the true theater experience. Also the room is small about 12x10

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post #6 of 23 Old 10-04-2013, 11:51 AM
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This is a little over budget but a very nice option. You can go a little less or a little more? Check out all four options and see what you think? I just built the SPA1000 option and am very impressed. You could go with conventional venting for cheaper though. http://creativesound.ca/details.php?model=Quartet12XB%20Subwoofer%20Kit

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post #7 of 23 Old 10-04-2013, 12:17 PM - Thread Starter
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That is a bit over my budget. Any other options? I could wait and save more for that one though. If it's worthwhile

Onkyo TXSR607, Mythos 8 Center, Studio Monitor 350's, Klipsch S-10 surrounds, Bic F12 sub

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post #8 of 23 Old 10-04-2013, 12:22 PM
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I think you have reasonable working parameters there...let's see what we can find that cranks it within those constraints....

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post #9 of 23 Old 10-04-2013, 12:26 PM
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Quote:
Originally Posted by Brad Sutliff View Post

That is a bit over my budget. Any other options? I could wait and save more for that one though. If it's worthwhile

It is a very good option but LTD will come up with a good one in your criteria I'm sure.

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post #10 of 23 Old 10-04-2013, 12:44 PM - Thread Starter
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Yeah I like it a lot. If I went the passive radiator path how would I tune it?

Onkyo TXSR607, Mythos 8 Center, Studio Monitor 350's, Klipsch S-10 surrounds, Bic F12 sub

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post #11 of 23 Old 10-04-2013, 12:45 PM
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your mains have no woofers! eek.gif

given that weak point, maybe it makes sense to find a subwoofer that has a good top end and will allow you to increase the crossover point up to 150hz or so. that way your mid-bass will have something big and powerful rocking it, in place of dual 5.25s.

something like this:

http://www.parts-express.com/pe/showdetl.cfm?partnumber=294-675

in a seven cubic foot net enclosure slot ported and tuned to around 22hz would pound the heck out of you in your room, but also have a nice top end that could play quite high into the lower midrange.

that and a 500 watt plate amp:
http://www.parts-express.com/pe/showdetl.cfm?partnumber=300-807

would be about where you are moneywise.

this is the max spl with 500 watts. of course you can eq it any way you want within that limit. the gently rolling off response would combine with your room gain to give you pretty much flat into the 20's if not to 20 even without eq. and again, it is a nice driver and a little different from many regular car/ht subs in that it can be crossed very high if you choose.


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post #12 of 23 Old 10-04-2013, 12:47 PM
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here it is against the 12" sdx 'low sensitivity' driver in a small enclosure also with 500 watts.


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post #13 of 23 Old 10-04-2013, 12:48 PM
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"It is a very good option but LTD will come up with a good one in your criteria I'm sure."

:-)~

maybe, but i'm not sure if that driver is 8 ohm only....need to check on that.

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post #14 of 23 Old 10-04-2013, 12:50 PM
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"Yeah I like it a lot. If I went the passive radiator path how would I tune it?"

passive radiator subs function like ported subs, but you change the tuning point by adding weight to the pr's, where as with a ported, you increase the length of the port to lower the tuning point. it can be calculated depending on what you want.

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post #15 of 23 Old 10-04-2013, 01:02 PM - Thread Starter
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Ok. Thanks for the info

Onkyo TXSR607, Mythos 8 Center, Studio Monitor 350's, Klipsch S-10 surrounds, Bic F12 sub

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post #16 of 23 Old 10-04-2013, 01:03 PM
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With the CSS PR the tuning function is on the outside of the driver. Looks a little funky but very easy to change the tune.. just about as easy as changing a port bung. The SPA1000 would give you 3dB more and with +3dB dsp at 18hz it's flat down to 14-15hz in a room your size.

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post #17 of 23 Old 10-04-2013, 01:17 PM - Thread Starter
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Thanks for the great ideas. I like both. Do you have an example of the enclosure your talking about? For the 18.

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post #18 of 23 Old 10-04-2013, 01:27 PM - Thread Starter
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I have another question as well. I have two jl audio 10s sitting around. What would I need to set those up to use?

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post #19 of 23 Old 10-04-2013, 01:44 PM
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the 18" enclosure can take many forms, but what I suggested (~7cubic feet net internal or so) is a very common size in both pro audio and commercial theater (aka imax, though they would use 8, you would use 1) :-)

here are a few random form factors. you could do slot port, round port, cube box, rectangle...it's your call.


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post #20 of 23 Old 10-04-2013, 01:46 PM
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" I have two jl audio 10s sitting around. What would I need to set those up to use?"

enclosures and amps!

with the model #, the thiele/small numbers can be found, the sub can be modeled, and a box can be designed around the model.

which amp depends on the impedances of the drivers.

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post #21 of 23 Old 10-04-2013, 01:54 PM - Thread Starter
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The model number of the subs is 10w1v2-8

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post #22 of 23 Old 10-04-2013, 01:55 PM - Thread Starter
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I like the idea of having the same enclosure set up as Imax...

Onkyo TXSR607, Mythos 8 Center, Studio Monitor 350's, Klipsch S-10 surrounds, Bic F12 sub

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post #23 of 23 Old 10-04-2013, 02:11 PM
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didn't have the v2's in the file. had the v1 and the v3 though, so the 2 is probably the same. this is a model of the v1 and the v2...

6 cubic footer, tuned to 22hz, both drivers in the same cab, 500 watts power.



the jl aren't going to be as good once you start getting above 60hz or so, so an 80hz crossover or something like that is probably what you want with these. and that leaves the 5.25" mains carrying the mid-bass and they really were never designed to do that.

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