Getting SPL out of 1 Alpine Type-R 1241D

[CKY 10+ year member]

Yep i'm a ***** , i already posted this in the Box Construction forum but got only 15 views and that's not enough //content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif Sorry //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

So , i got a Type-R 1241D in a ~0.75cu.ft. sealed box , and to be honest i'm dissapointed on the "SPL" part .... I'm powering the sub with a JBL GT75.4 amp , running 294RMS/ voice coil. Yes , i'm powering my sub with a 4 channel amp //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif that's the situation , it's because of my location Romania.

I was thinking about going ported. I want a serious improvement on the SPL part .... i was thinking to tune to 30Hz since i have no SSF. But i don't know the volume ... i understand that 1.6 would be recommended , but would it make enough difference ? I went through 15 pages of topics with the word "Type-R" and i haven't found a good solution .... Jmac recommended in one of this topics about a 2.5 ft^3 box //content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif

Hopefully this topic will fill the gap of Type-R SPL/SQL needs, as i searched and found no help. Now we got a topic with "Type-R" and "SPL" in the title //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

Not wanting to be an annoying noob, but 1 thread in excess won't do any harm //content.invisioncic.com/y282845/emoticons/blush.gif.99bc659ee2012b7d826165e26fb5eebe.gif

Remember , i used the //content.invisioncic.com/y282845/emoticons/search.gif.e79a63b2b580b39b282dff402646b704.gif up and down ...

So , how to get decent SPL out of one 12" Type-R ? Power is enough without SSF , but i need a box ..... also , on Ibanezcollectors vids on RealOfExcursion the box looks huge , and it's a 10" if i remember....

Thanks //content.invisioncic.com/y282845/emoticons/2thumbs.gif.fdc3ba010dbb42b61704534b46d02fe4.gif

Click to read more...

 

[iwantmorebass 10+ year member]

get another type r, one ain't gonna satisfy i know from personal experience.

 

[LightningStryk7 10+ year member]

Some guy I know has hit 150db with 1 Type R. But that was with a viper (3200 or 2800 or whichever is the high one) but he was tuned to 38 hz. I have 400 watts in a 3 cube box tuned to 33hz, man it gets some pretty good SPL im not disapointed plus it still sounds like butter. But I dont know waht to do about not having a ssf, but for the box size, it depends on your power. The type R can handle alot more power then what is rated on it, you could probably put it in a 2-2.5 cube box.

 

[JimJ 5,000+ posts]

30Hz? That box is tuned way too low if you want max SPL out of a single driver...run some sweeps with a sealed box, determine your vehicle's resonant frequency - use that information to build a box to suit.

 

[SPL140.2 5,000+ posts]

Tune it higher than 30hz, make the ported box and make the port big //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[LightningStryk7 10+ year member]

the reason he wanted to tune it so low is because he has no SSF. sheesh //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[zachzchw 5,000+ posts]

http://www.thecaraudiobox.com/installs/

Theres 150 out of a single type R. Shipping to Romania would kill you, though. Maybe look at their boxes, read the thing about "what makes our boxes better", and try to do some of them yourself.

 

[CKY 10+ year member]

Unfortunately thecaraudiobox.com doesn't mention the volumes , but like you people said , they have big,wide ports. Another TypeR is not an option for me , it costs 240$ here. Yes , 240$ for a 12" Type-R.

So i need to tune higher, but i can't because of no SSF. Maybe 33Hz will be ok ?

The volume ... hmmm ... i'm running 294RMS / voicecoil , of course with a ported box 350-400RMS would be ok. I'm plotting the box details in BassBoxPro6 but i don't know what to look for //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif .....

Let's take a look again , what do i know at the moment.

1. Huge port as seen on http://www.thecaraudiobox.com/installs/

2. I shouldn't go very big (like 3 ft^3) (because of no SSF)

 

[SBLAZER]

yes our type did a 150.5 on the Tlab, i say test diff size boxes, peak upper 40s and u can do it. also some power will do it also, they'll take the power, juss not that much for daily.

 

[CKY 10+ year member]

Got any kind of tips about the box volume what would be the limit bearing in mind that i have no SSF and more then 300RMS ...

 

[SBLAZER]

Hit me up on AIM: sblazertb, and ill help ya out //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif