$125 subwoofer kit

Discussion in 'Home Theater Projects' started by Greg->G, Oct 24, 2006.

  1. Greg->G

    Greg->G Agent

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    Hi,

    I have a friend who wants to build an inexpensive subwoofer. He only wants to spend a max of $125 and ideally $100 on the speaker and amp together, plus whatever it costs to make the cabinet. He's hoping to use a 12" woofer. Is there anything available in this price range? My first thought when he told me his budget was that it was a bit low and that he would be able to do much better if he was able to up it to the $150-$200 range, but I wanted to get some other opinions before I tell him that.
     
  2. Ryan Schnacke

    Ryan Schnacke Supporting Actor

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    This is a very difficult budget to work with. He might find someone still looking to part with a used SVS ISD woofer (after upgrading to the NSD woofer) for around $50 plus shipping. But even with that (terrific) deal on the woofer, he won't have enough left over for an amp that can really drive it. If he's got a 5.1 receiver for this system then no additional filters/crossovers are necessary - any amp of sufficient power will do. In this case I'd try to scrounge around for an unused receiver or pro amp to borrow from family or friends until I could afford at least a 250-300 watt plate amp.

    Otherwise the best deals near this budget range are this
    http://www.partsexpress.com/pe/pshow...number=300-635
    and this
    http://www.partsexpress.com/pe/pshow...number=300-633

    No, they are not kits. But it has been discussed many times before that you would be very hard pressed to build their equals for these prices.
     
  3. Robert_CA

    Robert_CA Stunt Coordinator

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    There's a Dayton Sub120 powered sub available on ebay for $125 + shipping. 12' driver with a 125 watt amplifier. Might want check that out.
     
  4. Robert_CA

    Robert_CA Stunt Coordinator

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    Another alternative would be to get something like an Ascendent Audio Assassin 12 for $90 and pair it with a PE SA100 100-watt amp for $90. It's little bit over his budget though. Do a sealed sonotube for a few dollars more and you've got a decent sub.

    Ideally, if you can convince your friend to spend just a little more money, I'd suggest the GR Research SW12 driver/PR combo (I think the combo is about $129) with something like the Apex Sr. or PE SA200 amp for about $250 or so. This may also seem pricey to him but a lot better performance can be had for a little bit more. See what he says.
     
  5. Robert_CA

    Robert_CA Stunt Coordinator

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    Opps!
    On that GR Research combo it's about $250 total for the driver and electronics,
     
  6. Owen Bartley

    Owen Bartley Second Unit

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    That is a pretty tight budget, and will be tough to get what he wants, especially new. You might have some luck on ebay or on the forums where there's a buy & sell section. Otherwise he might want to move down to an 8" or a 10" woofer that would work with one of then smaller 100 watt amps. If this is just a first sub and he's looking to fill in some bottom end, that might work out for him (assuming the room isn't huge, and neither are his other speakers, etc.). Sometimes that's all you need. And usually that's all you need to catch the DIY bug and get started on the path of endless upgrades.
     
  7. Greg->G

    Greg->G Agent

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    Thanks for the input everyone! I'll talk to my friend and see if I can get him to up his budget a little bit.
     
  8. Greg->G

    Greg->G Agent

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    Ok, I talked to my friend and he agreed to up the budget to $200. And he also said that he has a personal preference for non-paper cones. So what are some good deals for this new-and-improved budget? Thanks!
     
  9. Greg->G

    Greg->G Agent

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  10. Robert_J

    Robert_J Lead Actor

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    The Assassin 12" for $90.
    The 13Kv.2 for $75. Choose the v3 if you want the black cone. Make sure to get the dual 2 ohm VC configuration.
    The DVC 12" for $110 shipped, is a proven sub. Dozens of members have built subs with this driver.

    If you want to stretch the budget some more:
    The X12 for $119 shipped, would be a good choice if it wasn't a dual 4 ohm sub.
    The 12" High Fidelity is a great sound quality sub.
    Finally, the TC-1000 12" is on sale for $159. This is the best choice in my opinion. 24mm of xmax and the TC2+ motor system.

    -Robert
     
  11. Greg->G

    Greg->G Agent

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    Either the assassin or the dvc looks like it will be a good fit. Thanks for the links!

    Do you think he's crazy for having a problem with paper cones? I see that the dvc has a kevlar-impregnated paper cone, which seems like it would be plenty tough to me. Any idea what the cone on the assassin is made of?

    Thanks so much for all the help!
     
  12. JimPeitersen

    JimPeitersen Second Unit

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    He is a little "crazy" for worrying about a paper cone. Many argue that a reinforced paper (actually pulp) cone is the best design approach. I've owned many (think 100+) drivers and some of the best ones have been paper. The Assassin cone is reinforced pulp (paper).
    JP
     
  13. Robert_J

    Robert_J Lead Actor

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    According to Dan Wiggins (CEO of Adire Audio), he can stand on his paper/composite cones without them collapseing. And he's a healthy guy! Not to say that Ascendant Audio uses the exact same cones, but they are more than strong enough to get the job done.

    -Robert
     
  14. Greg->G

    Greg->G Agent

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    Yeah, that's kind of what I thought about paper cones as well. I think I have him convinced that it will be ok. He's planning on using the following combo:

    amp: BASH DIGITAL SUB AMPLIFIER 300W
    http://www.partsexpress.com/pe/showd...number=300-750

    speaker: assassin 12"
    http://www.ascendantaudio.com/assassin12specs.html

    We're planning to build a ported enclosure. Haven't figured out the volume/tuning/etc yet, but plan to soon.

    Does this amp/speaker combo seem like a reasonable match? Any glaring problems with this idea?

    thanks,
    greg
     
  15. Robert_CA

    Robert_CA Stunt Coordinator

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    Very good picks. 300 watts should be plenty for the Assassin12. Give Chad of Ascendant Audio a call or e-mail him. I believe that he could give you some recommended enclosures for our friend's sub (don't think they available anymore on the site). Of course you can also do a sonotube. Also, I think that there's some free soft available that you can use to calculate a box/tube.
     
  16. Robert_CA

    Robert_CA Stunt Coordinator

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    Oops! Take that back on what I said on the site info!

    The site suggests a 3.5 cu. ft. enclosure with a 20Hz tune for the Assasin 12.
     
  17. Robert_CA

    Robert_CA Stunt Coordinator

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  18. Robert_J

    Robert_J Lead Actor

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    If 3.5cf is too big, then TC Sounds has just introduced their first sub designed by Deon Bearden. The dB-500 10" only needs 2.7cf with a 21hz tune. It has 5mm more xmax than the Assassin so they should be able to reach the same volume.

    If you aren't familiar with Deon, he's responsible for most of the content on www.diysubwoofers.org and ran the Bass List (a e-mail news letter for bass heads). He was an engineer a Klipsch until they had a round of layoffs. He's only been at TC for a couple of weeks and he's already making news in the sub world.

    -Robert
     
  19. Greg->G

    Greg->G Agent

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  20. Robert_J

    Robert_J Lead Actor

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    That's the suggested enclosure for using it in a car. Here's a design that will work - link.

    -Robert
     

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