Back in the game, recommend me a sub please! 1000 watts RMS at 1 ohm.

[Jeffdachef 5,000+ posts]

Im looking at doing a 12Q1 in a ported enclosure. When you say net cu ft, are you saying that my enclosure should be 1.3 cu ft without the sub installed? Or are you telling me to make it 1.3 cu ft of airspace with the sub installed in the enclosure? I may have to do 3 3" Aero ports with the area Im working with, where would I purchase those? Also do I need to account for the airspace the ports will take up? Im just confused by the term net I guess.Thanks for all the help!

NET cubic feet is after the sub and port displacement. After you subtract everything is your bare amount of usable airspace for the sub. Dont forget to account in thickness of the wood.

 

[95TsiAWD 10+ year member]

NET cubic feet is after the sub and port displacement. After you subtract everything is your bare amount of usable airspace for the sub. Dont forget to account in thickness of the wood.

Well...in that case can anyone tell me the cu ft of the 12Q1 sub along with 3 3" Aeroports in total?

I have a box all drawn up thats 1.29068 cu ft, but I didnt factor for sub or port displacement.

 

[Jeffdachef 5,000+ posts]

area of a circle(aeroport diameter) =(pi/3.14) x radius² multiplied by length of aeroport multiplied by number of ports then divided by 1728 and thats how much cubic feet the aeroports will take up.

If you have a 25W x 14H by 12D, you have to subtract 1.5 away from each to account for 3/4 mdf thickness and multiply them all together and then divide by 1728(to get cubic feet)

Do you know how to tune your ports?

 

[95TsiAWD 10+ year member]

area of a circle(aeroport diameter) =(pi/3.14) x radius² multiplied by length of aeroport multiplied by number of ports then divided by 1728 and thats how much cubic feet the aeroports will take up.
If you have a 25W x 14H by 12D, you have to subtract 1.5 away from each to account for 3/4 mdf thickness and multiply them all together and then divide by 1728(to get cubic feet)

Do you know how to tune your ports?

Ive already got the box cu ft down, Ive built those for years. But Ive never accounted for sub displacement in the past, and no I dont know how to tune ports. Ive generally ran sealed or bandpass with all the old school MTX stuff I used to build going off of MTX specs on the ports/airspace.

 

[Jeffdachef 5,000+ posts]

Ive already got the box cu ft down, Ive built those for years. But Ive never accounted for sub displacement in the past, and no I dont know how to tune ports. Ive generally ran sealed or bandpass with all the old school MTX stuff I used to build going off of MTX specs on the ports/airspace.

download winisd and google up tutorials on how to use it. That will model the frequency response of your sub in that particular enclosure. Download torrec box calculator.

This guy is pretty thorough.

https://www.youtube.com/watch?v=moKlY5FQMOA&list=UUlpAQn9pPCz-xkv3ltb75iA

 

[jasonbillnelson 10+ year member]

Got a C2 Audio Threatcon 4 D2 12" Id sell ya. You'd be under powering it but at a 1000 watts it would still get down and sound really nice!

 

[mclerico83 5,000+ posts]

Yes that's after displacement so after aero and sub. The aero can be bought on parts express

 

[Dmac1991]

Dayton Ultimax 12s

the smaller sealed, the better

 

[mclerico83 5,000+ posts]

Precision Port 3" Flared Speaker Cabinet Port Tube Kit

Ports from same site. Their are some great sub enclosure designers that know the calculations very well on here and could design you an enclosure for very good price with cut sheets etc in whatever area you are working in

 

[95TsiAWD 10+ year member]

Precision Port 3" Flared Speaker Cabinet Port Tube Kit
Ports from same site. Their are some great sub enclosure designers that know the calculations very well on here and could design you an enclosure for very good price with cut sheets etc in whatever area you are working in

Ive got my enclosure all designed for my trunk and this sub at 1.3 cu ft as you suggested(not factoring sub/port displacement). I can simply alter the depth (front to back of trunk) to compensate for the port and sub volume displacement.

I have 6" of internal depth where the ports would be installed currently (would increase when I alter depth for sub/port displacement), have room for up to 3 of the 3" diameter aeroports you linked me to. I would like the sub to play as low of frequencies as possible. Can you recommend how many 3" aeroports and depth for me please? And would I need to call TC Sounds to get the displacement volume of the 12" driver?

Thanks again!

 

[mclerico83 5,000+ posts]

@ciaonzo ; he knows his tc sounds

 

[95TsiAWD 10+ year member]

Ive found to do 1.7 cu ft tuned to 32hz. So I know how to do my enclosure volume, port volume and deduction from the enclosure for net cu ft.

The only problem I have now is how much vd (volume displacement) does the TC 12Q1 have inside the enclosure, I cant find it anywhere!!

 

[blazian87 10+ year member]

Ive found to do 1.7 cu ft tuned to 32hz. So I know how to do my enclosure volume, port volume and deduction from the enclosure for net cu ft.
The only problem I have now is how much vd (volume displacement) does the TC 12Q1 have inside the enclosure, I cant find it anywhere!!

I would email PartsExpress directly as they would be able to tell you that answer. I'm guessing somewhere like .1~.2

 

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my old setup //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif i also ran a single one

Are those passive radiators on top?

 

[mclerico83 5,000+ posts]

I would email PartsExpress directly as they would be able to tell you that answer. I'm guessing somewhere like .1~.2 

---------- Post added at 08:24 AM ---------- Previous post was at 08:24 AM ----------

 

Are those passive radiators on top?

Yes 2 cube total after displacement tuned to 30hz