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Subs not hitting in sync.

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Topic review
   

Expand view Topic review: Subs not hitting in sync.

by cvr12 » Tue Apr 17, 2007 3:58 pm

Ok I can't find a decent box...I want something tuned to 33hz. The specs for the sub are listed below if someone can help me. Would 30hz be tuned too low? 40hz just isn't right for me....I want a little lower bass.

12" subwoofer with dual 4-ohm voice coils
» injection-molded polypropylene cone
» ribbed Santoprene rubber surround
» suitable for marine use
» power handling: 50-400 watts RMS (200 watts per coil)
» 800 watts peak power handling
» frequency response: 25-500 Hz
» sensitivity: 86.7 dB
» top-mount depth: 6-1/4"
» sealed box volume: 1.0-4.6 cu. ft.
» ported box volume: 1.75-2.25 cu. ft.

by GlassWolf » Sat Apr 14, 2007 1:18 pm

try 32 or 34Hz for a tuning frequency
you want to stay above the Fs of the subs

by cargodz » Sat Apr 14, 2007 6:32 am

cvr12 wrote:So the amp is pushing more than 1100watts?
No... it's pushing exactly 1100watts RMS (continuous power) @ 1 ohm...
So if you have your subs wired at 1 ohm and you tuned your gain in with a guess (which it sounds like you did)... then this explains why you're getting that burnt coil smell (You ARE burning them up).
NEVER account for "MAX Wattage" ratings, as they don't mean a thing (best ignored), and go buy a dmm and use the "How To" as I pointed out earlier. ;)

By the way, if you feel it necessary to use bass boost (which I don't recommend)... set the Bass boost where you want first, then set your gains... otherwise if you set your gains and then turn up the Bass Boost, you'll be clipping.... Clipping = Burn't voice coils and making perfectly good CVRs into paper weights :)

by cvr12 » Sat Apr 14, 2007 4:38 am

So the amp is pushing more than 1100watts? What about the subsonic filter.........it goes from 20hz to 50hz the box is tuned to 40.....I read to set the ss filter to 10hz below the box tuning....

by cargodz » Fri Apr 13, 2007 11:47 pm

Whaooo! I just went back and double checked your post on your amp... Memphis 1000D does 1100w RMS @ 1 ohm (Not max), so you probably have your gain set to high... Read the How to set your gains with a dmm (digital multi-meter) in the FAQ threads... and if you don't have a dmm get one (you can get a cheap one for around $10 bucks).

by cvr12 » Fri Apr 13, 2007 3:13 pm

The amp I have pushes 1100 watts max..........I only have the gain 1/4 the way up.......the bass boost is down almost all the way.....they are 800 watt a piece subs......rms is 400....so together rms is 800 for both of them.....must be clipping? 32hz sounds good.....what about 30? I found a nice subzone box at 30hz.

by jonnyb » Thu Apr 12, 2007 8:34 pm

mmmm. burnt voice coil smell... tasty

by captaincheesey » Thu Apr 12, 2007 8:15 pm

cvr12 wrote:I can play something that has good bass for about 5 minutes, and then I get the burning smell
Um, burning voice coils? Sending a clipped signal to them or way too much power?

by Ryan from Ohio » Thu Apr 12, 2007 5:11 pm

32Hz!

by cvr12 » Thu Apr 12, 2007 3:37 pm

Okay what tuning do you guys recommend.....I was thinking between 30-33hz because the box I have now is 40hz and it doesn't hit very low at all.

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