My sub sounds blown out below 50 hertz, Im looking for a replacement sub suggestion for the enclosure. - AVS Forum
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post #1 of 7 Old 01-19-2013, 05:45 AM - Thread Starter
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The sub is a m225 8" sub that came with the athena micra set http://www.athenaspeakers.com/products/m225-specifications/ . The sub lately sounds blown at or around 50 hertz which is driving me crazy. Is there a drop in 8" sub that I could use in this box without changing out the inside amplifier and if not what are my options ?

Thanks in advance
Shawn
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post #2 of 7 Old 01-19-2013, 05:50 AM
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you can probably contact the manufacturer and try to obtain a driver. but being this is the diy forum, chances are everyone will tell you to get a real sub, the drivers that you see thrown around in this section weigh more then your sub with enclosure.

won't be able to just drop anything in without seeing some real specs for the driver in your "sub"
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post #3 of 7 Old 01-19-2013, 06:17 AM - Thread Starter
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Ill check with Athena on monday, and I agree I need a real sub but I also need some real speakers too. The wife was not happy with my recent receiver purchase Marantz 1403 and that is going back for the 1603 or 5007 so Im trying to just get some sub back with what I got to deal with for the time being.

Would a car audio sub work with this or is there a website that sells just woofers ? I would be open to replacing the amplifier if you all think it would increase the performance of my system.

Thanks
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post #4 of 7 Old 01-19-2013, 06:19 AM
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We know three things already - interior volume is about 1 cubic foot, RMS power is 75 watts and the sub is ported. That's enough info to help pick a replacement that will work in your box. You need to answer two more questions before you try a replacement driver: What is the cut-out diameter in your sub's enclosure and what impedance is the current driver? Once you work that out, you can go ahead and give an 8" replacement a try. I've done it before with several cheap subs, really great results.

Of course you'll be encouraged to go DIY - a 12" ported DIY sub would be a major upgrade to most 8" NB offerings. A decent 15" DIY job would be untouchable in comparison. DIY does not automatically mean 100 lb 18" drivers filling your garage, although some poor folks who become addicted do end up that way biggrin.gif
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The sub is a m225 8" sub that came with the athena micra set http://www.athenaspeakers.com/products/m225-specifications/ . The sub lately sounds blown at or around 50 hertz which is driving me crazy. Is there a drop in 8" sub that I could use in this box without changing out the inside amplifier and if not what are my options ?

Thanks in advance
Shawn

Find out more about Mark Henninger at www.imagicdigital.com
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post #5 of 7 Old 01-19-2013, 06:40 AM
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....... is there a website that sells just woofers ?

Parts Express

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post #6 of 7 Old 01-19-2013, 07:27 AM
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Yup. Here's the page you want: http://www.parts-express.com/cat/subwoofers/14?kg=497|3922
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post #7 of 7 Old 01-19-2013, 08:38 AM
 
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FWIW, in the last few days I dropped in new drivers and radiators in a pair of eighteen year old Klipsch, SW12 II boxes. The replacement drivers and radiators were purchased from Parts-Express. They're doing just fine as they're now playing in the background with the intent of getting some loosening up time on them (fifty hours worth) before dialing them in.

Personally, just for the education one receives by fully exploring a home exercise lab of this type, I say buy a replacement eight inch driver and drop it in. For the education alone, it's well worth the price of admission.

My recommendation, go with the good stuff. biggrin.gif

Explore the "THIELE-SMALL PARAMETERS" (T-S parameters) and what they all mean. Check out some online box size calculators. Explore what the cone is made of, what the differences are and what the benefits are. Explore magnets and how magnet sizes play into the overall operational equation. Explore box sizes, manufacturing materials/thicknesses, ported vs sealed vs passive radiator, linings/insulation and how changing the box size changes the performance characteristics. It's a hobby, have some fun figuring it all out.

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