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Buy new 12" home theater sub, or buy plate amp for existing 15" Car sub?

post #1 of 9
Thread Starter 
Currently I just have an 8" Onkyo home theater sub. While watching a movie last week, one scene with really deep bass completely bottomed out the subwoofer and it sounded like total crap, so I'm looking for least a 12" subwoofer, but the low end home theaters subs only have 100 watt amplifiers (150 watts at best) and cannot handle the low note musical crescendos of horror movies well.

So I can either get a Dayton 12" subwoofer, the BIC F12, or get a 300 watt BASH and and wire it to an existing passive 15" car subwoofer. This subwoofer has dual voice coils and is rated at 2,000 watts. Theoretically I should be able to hook this sub up to get 8 ohms. All I'd have to do is mount the BASH amp externally onto the back of the enclosure or maybe cut out an opening using a jigsaw to mount it.

What would your recommendation be? Buy a low power home theater sub or spend the same amount of money on a plate amp and hook it to a larger car sub?


http://www.parts-express.com/dayton-audio-spa250-250-watt-subwoofer-plate-amplifier--300-803

http://www.parts-express.com/bash-300s-digital-subwoofer-plate-amplifier-300w-rms--300-750

Here's a photo of the sub (don't laugh). I can just peel the carpeting off and spray it with a black lacquer finish.

Edited by aweir - 7/10/16 at 10:53am
post #2 of 9
probably buy the dayton 12 as it seems like you need to know more about audio other then slapping 2 things together and expecting it to sound good. a 15" sub that is "rated" for "2,000 watts" seems like it would be massively under powered. but my guess is that you don't know what the rms of the sub is as that is more important stat then the "max" power rating. then finding a box for it to tuned to a good frequency would be the next thing and some design work needed.

if you are willing to learn and read then go ahead and get a plat amp and a matching sub to go along with it and build it. but if you want something right now just get the dayton.

EDIT: with the added pic that sub seems to be around 800rms supposedly but the manufacture doesn't want to even disclose that. also its a duel 4ohm coils and that would make it hard to work with as home audio is ether 4-8 ohm. yah it can be wired 8ohm but would be had finding something to put out power at 8ohms.

if your wanting to make something then look into these as they should be fine together.

http://www.parts-express.com/dayton-audio-sa1000-subwoofer-amplifier-rack-mountable--300-811

http://www.parts-express.com/dayton-audio-15-reference-series-ho-subwoofer-and-cabinet-bundle--300-7093
Edited by bobfig - 7/10/16 at 11:14am
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post #3 of 9
Thread Starter 
Ok but I got this sub from someone who told me the enclosure was custom built for the speaker, so i assume he knew the specs before hand and that it's tuned pretty low. The only issue I can foresee is "one note bass" if it wasn't tuned perfectly or excessive cabinet resonance if not braced enough. The Fs is 30Hz. I would also imagine that the RMS power handling is well within the limits of a 200-300 watt plate amp. I'm not trying to shatter my living room windows with it. I just want to put it to use or else sell it on Craigslist.
Quote:
15" sub that is "rated" for "2,000 watts" seems like it would be massively under powered.

Uhhh.... I meant PEAK power.

It's a dual 4 ohm voice coil so I should be able to wire it to 8 Ohm.


Edited by aweir - 7/10/16 at 11:29am
post #4 of 9
if you
Quote:
Originally Posted by aweir View Post

Ok but I got this sub from someone who told me the enclosure was custom built for the speaker, so i assume he knew the specs before hand and that it's tuned pretty low. I would also imagine that the RMS power handling is well within the limits of a 200-300 watt plate amp. I'm not trying to shatter my living room windows with it. I just want to put it to use or else sell it on Craigslist.
Uhhh.... that's PEAK power.

if your wanting to take a leap then go ahead. i have the plate amp and its been good to me. all tho i would go stand alone so you don't cut into the box and mess with the tuning of it.

ether the one from my first post or http://www.parts-express.com/dayton-audio-sa230-230w-subwoofer-amplifier--300-813

just make sure it is wired to 8 ohms
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post #5 of 9
Thread Starter 
Thanks man, but looking at the specs of that external amp it's (1 % THD) 156 Watts RMS into 8 ohms, 233 Watts RMS into 4 ohms

It looks underpowered to me. If I had a 2 Ohm DVC sub instead I could at least run it at 4 Ohms and make use of the full 233 Watts available.

That first amp you posted is a bit out of my price range. For that price I would rather pick up any of the 300 watt home theater subs. I think a plate amp is my best bet.
Edited by aweir - 7/10/16 at 11:50am
post #6 of 9
yah i know that amp is small but it is ether that (same as the plate amp you listed) or the larger one above in post #2

http://www.parts-express.com/dayton-audio-sa1000-subwoofer-amplifier-rack-mountable--300-811
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post #7 of 9
Thread Starter 
Sorry, I didn't realize the plate amp was only 156 RMS also. Bummer. That BASH amp is rated at 300 Watts @ 4 Ohms which would probably be around 150-200 watts RMS but they don't give the wattage @ 8 Ohm which seems manipulative. Maybe I should just reconsider my options either getting a different sub or the higher power amp. I think a different sub would be cheaper, but then I might need a new enclosure. Back to square one.

In the end, I'd be better off with the BASH 300S amp...it's the most wattage for the money.
post #8 of 9
well the bash 300watt is rated at 4 ohms same as the dayton
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post #9 of 9
Thread Starter 
Yes but the Bash is on sale and has slightly higher wattage. The Dayton only comes with a free hat so you can turn into a walking billboard.

Come to think of it, the Dayton Audio SPA500 would be a better option. It's cheaper than the SA1000 external amp and puts out 273 watts @ 8 Ohms. The Bash amps for whatever the reason refuse to tell you what the 8 Ohm rating is. I'd choose 8 Ohm because there's generally less THD and less load on the amp.

I feel like I'm just wasting your time going back and forth. But realistically unless I planned to really crack the volume up, the Dayton Audio SA230 should be enough to power this subwoofer being that cheaper built-in amps are only 100-150 watts peak. With that amp I'd be getting around 150 watts RMS which should suit my needs without having to cut a hole in my enclosure. This will be the I'll probably get thumb.gif
Edited by aweir - 7/10/16 at 1:15pm
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