15" type R box 3.8^3@27hz

[Supergumby5000 5,000+ posts]

When tuned that low, Type R's have a terrible response curve, at least theoretically in WinISD. There's a big valley above tuning, and a large peak near tuning, which would more than likely give you exaggerated extreme lows in a car. They model much better with a higher tuning and a smaller box.

ill second this.

The box in my truck is tuned quite low (peaking at 29hz on a TL), which is the way i wanted it though. Throughout 35+ HZ frequencies, the 4 15s sound great with music (dont drown anything out), but when you get lower around peak frequency, its just retarded loud.

just depends what you are after i guess. With 1 15 i would tune higher as stated.

 

[GAM3OVR 5,000+ posts]

My 15" Type R in a 3.6ish tuned to 30Hz is pretty **** good.

Has that punch in the chest feeling

 

[IDSkoT 5,000+ posts]

ill second this.

The box in my truck is tuned quite low (peaking at 29hz on a TL), which is the way i wanted it though. Throughout 35+ HZ frequencies, the 4 15s sound great with music (dont drown anything out), but when you get lower around peak frequency, its just retarded loud.

just depends what you are after i guess. With 1 15 i would tune higher as stated.

Well, the whole idea is to get it so that there's a FLAT response curve. I've never owned a Type R, and when people ask me to design a box they tell me a frequency. I just know for most subs, you tune lower than listening range if you want good quality.

 

[GalitanNRG 10+ year member]

Uhh... the point is to have a nice flat response.


You did measure the length where the port ends? Like, actually going into the box.

Yes, i measured the distance back, right, down, and right. Not totally sure I needed to measure that last right turn though.

 

[Notloud00 10+ year member]

4 cubes at 35 would prolly do well.

 

[GalitanNRG 10+ year member]

This is somewhat related. My buddy told me that i should have my woofer firing down and my port facing forward. I drive a 98 Cherokee. So, would this port forward/sub down configuration sound ok, or should i go with something else?

 

[Notloud00 10+ year member]

i can design u a box that would SLAM if u have a jeep.... and no, sub up port back would be loudest.

i came up with around 4.1 cubes with around 86 sq. of port tuned to 35 hz would absolutely slam....

 

[GalitanNRG 10+ year member]

Thanks for the offer, but I'll go with what I got (yea, I'm that cheap). Although I figure your design would probably slam the sh*t out of mine HAHA.

 

[Notloud00 10+ year member]

Thanks for the offer, but I'll go with what I got (yea, I'm that cheap). Although I figure your design would probably slam the sh*t out of mine HAHA.

lol i was just gonna pm u the dims to see if they are ok, man its totally free //content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif i just plugged in sum nums into the re calc for ya. gives u a cut sheet and everything too //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[GalitanNRG 10+ year member]

I guess if your willing i'll check em out B).

 

[Lakota 5,000+ posts]

4 cubes at 35 would prolly do well.

That's what I recommend.

 

[Lakota 5,000+ posts]

Uhh... the point is to have a nice flat response.

Then why buy a Type R? They're not that great sounding. If you're looking for something to sound pretty then get something that's meant to.

 

[snb778 5,000+ posts]

i've seen the RRRRRR's do 150+ @under 30Hz., and I believe it was on music

 

[dman4486 5,000+ posts]

Well, the whole idea is to get it so that there's a FLAT response curve. I've never owned a Type R, and when people ask me to design a box they tell me a frequency. I just know for most subs, you tune lower than listening range if you want good quality.

works for some drivers, but not for others. i am tuned 2cubes @24hz for each of my tens and I truly do have a flat enclosure response curve. I have modeled the 15" and 18" fiq which can never have a flat response curve(without 3db troughs) until you reach enclosure size IIRC of around 28cubes.

I can do the 15" R if you would like.