enclosure, 12 inch type r

Im running 1 12inch type r in a 2.0 cubic sloted inclosure tuned to 35 hz the bass is deep but the higher bass tones sound like crap so i was thinking about buildind a box with an aero port any suggestions i dont know much about them or wat i should tune the next box to that will still hit hard any imput would be greatly appreciated thank you

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Seth

What do you mean by "higher bass tones"? What is your crossover setting? A 2-cuft enclosure is a little large for a Type R but it should be fine as long as you are not overdriving it.

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Some tones hit hard and the rest sound distorted.i was told to make my box as big as i could is that not true?

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Seth

Yeah that's not true. Too much space can be a bad thing. Although subs need their space and enough space is very important. Maybe they meant make it as big as you can because you don't have a ton of space, if your in a car for example. But if you had a Tahoe you wouldn't make a wall for a 12, "making it as large as possible". I used to run 2 type r 10s each in their own ported box. 1.6 ft^3 (feet cubed) tuned at 33hz. They sounded good. What is your crossover set at that may be why highs aren't sounding as good as they could.

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Hello.

Im sorry im kind of new to all this by crossover do you mean my low pass filter on my amp

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Seth

My low pass goes from 40hz to 300hz and its set a quarter of the way up

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Seth

A Type R needs about 1.3 CUFT enclosure. Your low pass filter on your amp should be set to no higher than 100Hz. How did you set the gain on the amp?

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I set my gain to 2volts because thats what the manual for my deck said the rca outputs were

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Seth

Btw im running a hifonics 1200.1 zues amp at 1 ohm

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Seth

if you feel like your higher bass tones are lacking then maybe you should think about getting better mids. building a new box that is tunes higher will just shift the peak of the subs output and might help a little bit with your "high bass notes" but it will be at the expense of your lows. 2 cubes ported for a type R is about the maximum i would recommend for those but that is assuming that you dont mean that the entire box including the port is 2 cubes... if thats the case then you may want to make it a bit bigger because type R's like bigger boxes. you could tune as high as 45hz without sacrificing too much low end performance even though i prefer mine tuned below 40hz.

Yes lopass is a crossover. When it's a low pass if you set it at 100hz it will play all hz starting at 100 and below. You can look at your subwoofer frequency range and set filter according. Example if your sub plays 20hz - 125hz, set lp filter at 125hz so it'll play the whole range the subwoofer is capable of. The high-pass is opposite used for speakers/tweeters. Set at 125hz it'll play 125hZ and up. High pass allows high frequency. Low pass allows low frequency.

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Hello.

whitemike0110 wrote:

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You can look at your subwoofer frequency range and set filter according. Example if your sub plays 20hz - 125hz, set lp filter at 125hz so it'll play the whole range the subwoofer is capable of. The high-pass is opposite used for speakers/tweeters. Set at 125hz it'll play 125hZ and up. High pass allows high frequency. Low pass allows low frequency.

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This is not the way to properly set any crossover point and most often will lead to undesirable results. In fact, most subwoofers have a much broader frequency range than the example above. In every system I've installed, I've never set a low pass filter for any subwoofers that high. Most often it's been near or below 80Hz.

High pass and low pass filters allow frequencies above and below the crossover point to pass without attenuation respectfully. The degree of attenuation per octave (aka slope) varies (6dB, 12dB, 18dB, ...90dB, etc). Subsonic filters (which are also high pass filters) are often used as well as low pass filters for subwoofers in ported enclosures where the high pass filter may be set at or above 20Hz depending on the set up and tuned port frequency, typically around 1/2 octave below the tuned port frequency.

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the12volt • Support the12volt.com

https://www.the12volt.com/caraudio/cross.asp#powera

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the12volt • Support the12volt.com

Yeah my example is in lament terms so you can grasp the concept. But with speakers for example you don't want to get your high-pass as low as the freq response, asking for a blown speaker. But as a concept that's how it works

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Hello.

Thx i really appreciate all the help this site is great

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Seth

whitemike0110 wrote:

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Yeah my example is in lament terms so you can grasp the concept. But with speakers for example you don't want to get your high-pass as low as the freq response, asking for a blown speaker. But as a concept that's how it works

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whitemike0110, this is inaccurate information.

sethwilliams88 wrote:

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Thx i really appreciate all the help this site is great

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Thanks Seth! You're welcome!

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the12volt • Support the12volt.com

It's incorrect to keep frequency range in mind when setting crossovers?

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Hello.

No, not at all. You should, but your statement above is incorrect. Example: You have a subwoofer with a frequency response of 24-200Hz in a ported enclosure that is tuned to 40Hz. You might set your subsonic filter (which is a high pass filter) to 30Hz and your low pass filter to 80Hz.

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the12volt • Support the12volt.com

crossovers have three basic functions, they keep harmful frequencies from damaging the speaker, they keep your speakers from playing useless frequencies that are beyond the actual audible frequency response, and they help you blend your whole system together. what i mean by that is the same as what THE12VOLT said in the example with the sub and ported box situation. the box that you install the subs in will always limit the audible frequency response even if the sub's specs say it plays up to a certain frequency. so if you know that the sub woofer box only allows the sub to play a certain bandwidth, lets say 30 - 120HZ at an audible level, then anything above or below that is just wasting your amps energy by making it try to produce frequencies that you either wont hear or will damage the speaker. there is really no right way to set your crossover but there are wrong ways. understanding the actual audible responses of your speakers and setting your crossovers with that knowledge in mind can mean the difference between bad sound and great sound even with average speakers.

the12volt wrote:

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No, not at all. You should, but your statement above is incorrect. Example: You have a subwoofer with a frequency response of 24-200Hz in a ported enclosure that is tuned to 40Hz. You might set your subsonic filter (which is a high pass filter) to 30Hz and your low pass filter to 80Hz.

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Thanks for your correction yeah your knowledge goes much deeper than mine I'm only on the surface. I was trying to lay out the basics of a crossover for him like a low pass allows low frequencies and high pass allows highs. he wasn't sure what a crossover was. thanks for your input and knowledge!

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Hello.

Ok im a lil confused now so if im running a type r in a box tuned to 35hz wat should i set my low pass and subsonic filters to?

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Seth

sethwilliams88 wrote:

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Ok im a lil confused now so if im running a type r in a box tuned to 35hz wat should i set my low pass and subsonic filters to?

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Lo pass 80-100hz and sub filter at 20-30hz but that's me. Set it, listen to a few songs your familiar with and play with it a little. I think you'll be good around those levels.

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Hello.

Ok thank you

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Seth

Need recommendation on what kind of box to build. Right now I have one Alpine Type R sub running on a Hifonics 1200 .1 Zeus amp in a 2.5 cubic slot ported box tuned to 35 hz. The bass is deep but only the deep bass sounds good.so i was thinking about building a new box. Does anybody have any recommendations on a box I should try to build that has really deep bass and sounds good. I would appreciate any input. Thank you

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Seth

What size woofer is it?

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12 inch

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Seth

2.5 cuft is large for a 12" type R. Best performance is usually 1.5 to 1.75 cuft ported at about 35-37 Hz.

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So I just got 2 alpine swr12d2 sub's and a re audio zxt5000.1 amp. I would like to build a box for them at around 4 cubic feet tune to 33 to 35 Hertz. Can somebody please help me with a cut list I would like to build a slot port and I would also like to know if that's a good size box so my Subs aren't bottoming out

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Seth