| Author |
Thread: Alpine typer 1222D ...4 or 1ohm??? |
    
Silver Member Username: Paogr
Athens
Greece
Post Number: 152
Registered: Dec-05
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| Posted on Monday, January 14, 2008 - 06:26 pm: |
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For about three months i have a typer 12" (2+2ohm) with this amp:
http://ampguts.realmofexcursion.com/SinusLive_SL_A-1500/
wired at 4ohm (550w).
This is my box:
2cf at 32Hz.
The gain was set correctly with a dimm with volume at 25/35 and sub out at 12/15 (i have alpine 9812).
Yesterday, i set the sub out volume from 12/15 to 8/15 and wired the sub at 1ohm. Now it is fairly louder, but i'm worring about giving too many watts to the sub (i beleive around 1000 clean watts).
If you were me, what would you do?
(Thanks and sorry for my English  ) |
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Gold Member Username: Nd4spd18
Northwest PA
Post Number: 5440
Registered: Jul-06
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| Posted on Monday, January 14, 2008 - 07:32 pm: |
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That sub should take 1000w fine |
Platinum Member Username: Rovin
4 10 Pioneer...
Post Number: 12795
Registered: Jul-05
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| Posted on Monday, January 14, 2008 - 08:39 pm: |
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1 x 550W @ 4 ohms (THD 0.3 %)
1 x 900W @ 2 ohms (THD 0.4 %)
1 x 1500W @ 1 ohm (THD 0.8 %)
even if ur amp does 1000wrms that would a tad much for a type R unless u keep the vol knob low .... |
Silver Member Username: Paogr
Athens
Greece
Post Number: 153
Registered: Dec-05
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| Posted on Tuesday, January 15, 2008 - 06:57 am: |
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Ok thank you guys, i will be careful.
As i said before, i have the sub out volume from 12/15, where i had set the gain using a dmm, to 8/15.
Here is a video when i had it wired at 4ohm.
http://rapidshare.com/files/67947617/123.MOV
*One of these days i will go to a friend, who has a termlab, to get it metered. I'll tell you the results. |
Silver Member Username: Alpine97
Paramount,
California
USA
Post Number: 230
Registered: Jan-08
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| Posted on Wednesday, January 16, 2008 - 07:20 pm: |
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I have two of them on a memphis ST1000D. I have done much research and yeah..they are underrated. But, Alpine says 500WRMS for a reason, probably to make them last longer. Of all the research I have conducted, those subs are good at 750 RMS. I would not go over that. |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 5519
Registered: Jul-06
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| Posted on Wednesday, January 16, 2008 - 09:17 pm: |
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I'd say 1000w on music should be ok. But yeah, I wouldn't go blasting 1000w of test tones/bass tracks into it. |
Silver Member Username: Paogr
Athens
Greece
Post Number: 161
Registered: Dec-05
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| Posted on Sunday, January 20, 2008 - 03:26 pm: |
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Yesterday i went to a friend and i metered my car with a termlab.
The number is very impressive!
139.9 at 39Hz!! I didn't expect so much!
Here is the foto:
car: nissan sunny '89 sedan 4D
no electric upgrades
sub: alpine typer 1222d
box: 2cf at 32Hz
amp: sinus sla 1500 (1500w - 1ohm)
HU: alpine 9812rb
engine on at 2000rpm, doors windows closed, sensor on the dash |
Gold Member Username: Big_edge_head
Milwaukee,
Wisconsin
MY SUB...
Post Number: 1188
Registered: Mar-07
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| Posted on Sunday, January 20, 2008 - 03:32 pm: |
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very nice. nice box too. |
Silver Member Username: Philly306
After 194dBs your car ...,
North carolina
Post Number: 802
Registered: Apr-07
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| Posted on Sunday, January 20, 2008 - 03:33 pm: |
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very nice especially for a daily driver |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 5620
Registered: Jul-06
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| Posted on Sunday, January 20, 2008 - 08:37 pm: |
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That's good SPL for a 12" sub........ my 15" only did .6 db more than that when it was only 1000w. Of course the vehicle has something to do with it. |
Gold Member Username: Insearchofbass
Post Number: 7598
Registered: Jun-04
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| Posted on Sunday, January 20, 2008 - 09:01 pm: |
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NICE score at 39 hz |
Platinum Member Username: Rovin
4 10 Pioneer...
Post Number: 12851
Registered: Jul-05
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| Posted on Sunday, January 20, 2008 - 10:01 pm: |
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wow !
Thats VERY impressive for a SQL sub tuned that low
whne i had my 2 each was in about 1.75cuft also tuned 32hz & it used really shake stuff around outside my ride ...yes even after a yr i still miss em.... |
Silver Member Username: Somedonniedude
Illinois
United States
Post Number: 774
Registered: May-07
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| Posted on Monday, January 21, 2008 - 08:27 pm: |
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Thats pretty sweet. How much power do you think you were running to it when it hit 139.9? |
Silver Member Username: Paogr
Athens
Greece
Post Number: 162
Registered: Dec-05
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| Posted on Tuesday, January 22, 2008 - 06:36 am: |
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To tell you the truth i don't know.
I have set the gain as this link says:
http://www.subwoofertools.com/forum/setgain.asp
with volume 25/35 and sub out 10/15.
With these settings i was playing a soundstream T5-15. One day while i was listening to a bass song (Gimmie That (Produced By Drumma Boy)) i turned the volume at 30/35 and after a minute i smell something from the sub and i turned the volume down.
So i beleive that the amp puts the max clean power with volume 25/35 and sub out at 10/15 (when i have it at 1ohm).
Now with the typer i had the volume at 25/35, sub out 8/15 and i played a sweep 100 to 20Hz to see where it puts out the max db. It hit 139.1 at 39Hz.
Then i played a 39Hz tone and it hit 139.6. After that i set the sub out at 12/15. Result: 139.8
Then volume 28/35 sub out 15/15 and it hit the best result 139.9. At the end i turned the volume all the way up at 35/35 but it didn't give me better number..
I think i was running thes sub with over 1kw. What do you think?
*LPF was at 160Hz and subsonic at 25-26Hz, voltage 12.6-12.7v |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 5656
Registered: Jul-06
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| Posted on Tuesday, January 22, 2008 - 08:41 pm: |
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Your LPF is waaaaaaaaaaaay too high...... set that to ~70-80 hz |
Silver Member Username: Paogr
Athens
Greece
Post Number: 163
Registered: Dec-05
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| Posted on Wednesday, January 23, 2008 - 04:28 am: |
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O no no, i set the LPF at 160Hz only during the Termlab testing, so that i dont lose power from the amp.
Daily i have it set at 80Hz. |
Gold Member Username: Insearchofbass
Post Number: 7620
Registered: Jun-04
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| Posted on Wednesday, January 23, 2008 - 10:46 am: |
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your thread is inspiring me even more to see how loud I can get my single re re 12 down low on 175 to 250 rms in my 1995 ford taurus .... my car should do good down in the low frequencies anyway |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 5702
Registered: Jul-06
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| Posted on Wednesday, January 23, 2008 - 01:35 pm: |
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Why would you change the LPF form 80 to 160 when the tones you're playing were well below 80? It would make no difference........ |
Silver Member Username: Paogr
Athens
Greece
Post Number: 164
Registered: Dec-05
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| Posted on Wednesday, January 23, 2008 - 05:44 pm: |
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I didn't know at which frequency the sub puts out max dbs. If i knew that the peak freq is 39Hz i wouldn't turn the LPF to 160Hz.. i would leave it at 80Hz..
I hope you understand my (bad) English |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 5720
Registered: Jul-06
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| Posted on Wednesday, January 23, 2008 - 08:53 pm: |
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Ah I see.
Yep I understand it |
Gold Member Username: •cam•
BC
Canada
Post Number: 1737
Registered: Nov-06
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| Posted on Wednesday, January 23, 2008 - 09:04 pm: |
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Crossed at 80 Hz will give you an F12 (assuming it's a 12dB/octave crossover) of 80 Hz, so it's starting to cut power at 40 Hz.
Does F12 exist, or is it just F3? |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 5722
Registered: Jul-06
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| Posted on Wednesday, January 23, 2008 - 09:14 pm: |
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no it starts cutting at 80 hz. |
Gold Member Username: •cam•
BC
Canada
Post Number: 1740
Registered: Nov-06
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| Posted on Wednesday, January 23, 2008 - 09:28 pm: |
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Hmm. Well, is there something else related to car audio that I could have read that about, then applied to crossovers? |
Gold Member Username: •cam•
BC
Canada
Post Number: 1742
Registered: Nov-06
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| Posted on Wednesday, January 23, 2008 - 10:31 pm: |
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Cmon, man. I know I read that; I'd put my life on it. It was definitely from a credible source. I'm pretty damn sure it had to do with crossovers, too. I could be wrong on that part, though. |
Gold Member Username: •cam•
BC
Canada
Post Number: 1743
Registered: Nov-06
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| Posted on Thursday, January 24, 2008 - 12:28 am: |
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Little bump for MS.
Goodnight. |
Gold Member Username: Insearchofbass
Post Number: 7639
Registered: Jun-04
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| Posted on Thursday, January 24, 2008 - 09:56 am: |
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well if you think about it cam the crossover set at 80 hz lets 80 hz and down in thats why they call it a LPF |
Gold Member Username: Th3pwn3r
Post Number:...
Post Number: 6590
Registered: Jul-06
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| Posted on Thursday, January 24, 2008 - 10:12 am: |
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If you set your cross over with a -12db slope from 80 hz it's going to progressively cut your frequencies above 80hz to where it will no longer play at a frequency above 80hz. It doesn't cut frequencies below 80hz ex:79,78,77,76,75 and so on.
"Crossed at 80 Hz will give you an F12 (assuming it's a 12dB/octave crossover) of 80 Hz, so it's starting to cut power at 40 Hz.
Does F12 exist, or is it just F3?"
This is what I love about my HU. I can se the crossover from 31.5hz over 100hz with a slope ranging from 6-18 -db depending on how I want it to sound. I usually drive around with it at 40hz and a -18db slope. Even then it can get too loud and rattle things so I have to run the 31.5crossover and -18hz. Setting it to 80hz is so much louder to the ear and makes it sound like trash because everything shakes,rattles and rolls. |
Gold Member Username: Insearchofbass
Post Number: 7641
Registered: Jun-04
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| Posted on Thursday, January 24, 2008 - 10:29 am: |
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"If you set your cross over with a -12db slope from 80 hz it's going to progressively cut your frequencies above 80hz to where it will no longer play at a frequency above 80hz. It doesn't cut frequencies below 80hz ex:79,78,77,76,75 and so on."
The other half of the explanation concerning the 12 db slope ....Rob being the thorough guy that he is...I just assumed you would know the rest....thanks Rob |
Gold Member Username: Th3pwn3r
Post Number:...
Post Number: 6605
Registered: Jul-06
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| Posted on Thursday, January 24, 2008 - 12:49 pm: |
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"The other half of the explanation concerning the 12 db slope ....Rob being the thorough guy that he is...I just assumed you would know the rest....thanks Rob"
Haha Sean, you know what's up. |
Gold Member Username: Th3pwn3r
Post Number:...
Post Number: 6606
Registered: Jul-06
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| Posted on Thursday, January 24, 2008 - 12:50 pm: |
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"This is what I love about my HU. I can se the crossover from 31.5hz over 100hz with a slope ranging from 6-18 -db depending on how I want it to sound. I usually drive around with it at 40hz and a -18db slope. Even then it can get too loud and rattle things so I have to run the 31.5crossover and -18hz. Setting it to 80hz is so much louder to the ear and makes it sound like trash because everything shakes,rattles and rolls."
Correction! I have to run the 31.5hz crossover and -18DB slope. I just saw it and realized I couldn't edit it  |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 5736
Registered: Jul-06
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| Posted on Thursday, January 24, 2008 - 03:42 pm: |
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Rob pretty much explained it all there |
Silver Member Username: Drant19
DUB-C,
TX
Post Number: 283
Registered: Aug-07
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| Posted on Thursday, January 24, 2008 - 04:36 pm: |
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my 780mp HU has this business lol, but i dont know what it does. i have the crossover at 80hz and either -18, -12, and -6 slope. what do the slopes do? should i have the crossover lower? |
Gold Member Username: Nd4spd18
Northwest PA
Post Number: 5742
Registered: Jul-06
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| Posted on Thursday, January 24, 2008 - 06:13 pm: |
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80hz -18db is what I would use
A crossover slope determines how much of the frequencies above/below the x-over setting can get through. A crossover is not a brick wall filter, that is if you set your LPF at 80hz it does not mean EVERYTHING above 80 hz will be blocked. The slope is the steepness of the roll-off.
See the graphic on this page. this is probably hard to understand but I can't think of a way to explain it better.
http://www.bcae1.com/xovrslop.htm |
Gold Member Username: •cam•
BC
Canada
Post Number: 1745
Registered: Nov-06
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| Posted on Thursday, January 24, 2008 - 06:35 pm: |
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Interesting. How the he|| did I get that idea??
You did a fine job of explaining it to Abarca.
I'll have to find where I read that. |
Silver Member Username: Drant19
DUB-C,
TX
Post Number: 289
Registered: Aug-07
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| Posted on Friday, January 25, 2008 - 02:29 am: |
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thanks i understand now!
and 80hz -18db is what i have it on now. |
