Alpine typer 1222D ...4 or 1ohm???
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Silver Member Username: PaogrAthensGreece Post Number: 152 Registered: Dec-05 | 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: Nd4spd18Northwest PA Post Number: 5440 Registered: Jul-06 | That sub should take 1000w fine |
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Platinum Member Username: Rovin4 10 Pioneer... Post Number: 12795 Registered: Jul-05 | 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 .... |
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Silver Member Username: PaogrAthensGreece Post Number: 153 Registered: Dec-05 | 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. |
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Silver Member Username: Alpine97Paramount, California USA Post Number: 230 Registered: Jan-08 | 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. |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 5519 Registered: Jul-06 | I'd say 1000w on music should be ok. But yeah, I wouldn't go blasting 1000w of test tones/bass tracks into it. |
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Silver Member Username: PaogrAthensGreece Post Number: 161 Registered: Dec-05 | 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 |
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Gold Member Username: Big_edge_headMilwaukee, Wisconsin MY SUB... Post Number: 1188 Registered: Mar-07 | very nice. nice box too. |
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Silver Member Username: Philly306After 194dBs your car ..., North carolina Post Number: 802 Registered: Apr-07 | very nice especially for a daily driver |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 5620 Registered: Jul-06 | 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. |
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Gold Member Username: InsearchofbassPost Number: 7598 Registered: Jun-04 | NICE score at 39 hz |
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Platinum Member Username: Rovin4 10 Pioneer... Post Number: 12851 Registered: Jul-05 | 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.... |
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Silver Member Username: SomedonniedudeIllinois United States Post Number: 774 Registered: May-07 | Thats pretty sweet. How much power do you think you were running to it when it hit 139.9? |
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Silver Member Username: PaogrAthensGreece Post Number: 162 Registered: Dec-05 | 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 |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 5656 Registered: Jul-06 | Your LPF is waaaaaaaaaaaay too high...... set that to ~70-80 hz |
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Silver Member Username: PaogrAthensGreece Post Number: 163 Registered: Dec-05 | 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. |
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Gold Member Username: InsearchofbassPost Number: 7620 Registered: Jun-04 | 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 |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 5702 Registered: Jul-06 | 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........ |
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Silver Member Username: PaogrAthensGreece Post Number: 164 Registered: Dec-05 | 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 |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 5720 Registered: Jul-06 | Ah I see. Yep I understand it |
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Gold Member Username: •cam•BC Canada Post Number: 1737 Registered: Nov-06 | 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? |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 5722 Registered: Jul-06 | no it starts cutting at 80 hz. |
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Gold Member Username: •cam•BC Canada Post Number: 1740 Registered: Nov-06 | Hmm. Well, is there something else related to car audio that I could have read that about, then applied to crossovers? |
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Gold Member Username: •cam•BC Canada Post Number: 1742 Registered: Nov-06 | 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. |
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Gold Member Username: •cam•BC Canada Post Number: 1743 Registered: Nov-06 | Little bump for MS. Goodnight. |
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Gold Member Username: InsearchofbassPost Number: 7639 Registered: Jun-04 | 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 |
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Gold Member Username: Th3pwn3rPost Number:... Post Number: 6590 Registered: Jul-06 | 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. |
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Gold Member Username: InsearchofbassPost Number: 7641 Registered: Jun-04 | "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 |
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Gold Member Username: Th3pwn3rPost Number:... Post Number: 6605 Registered: Jul-06 | "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. |
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Gold Member Username: Th3pwn3rPost Number:... Post Number: 6606 Registered: Jul-06 | "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  |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 5736 Registered: Jul-06 | Rob pretty much explained it all there |
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Silver Member Username: Drant19DUB-C, TX Post Number: 283 Registered: Aug-07 | 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? |
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Gold Member Username: Nd4spd18Northwest PA Post Number: 5742 Registered: Jul-06 | 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 |
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Gold Member Username: •cam•BC Canada Post Number: 1745 Registered: Nov-06 | 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. |
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Silver Member Username: Drant19DUB-C, TX Post Number: 289 Registered: Aug-07 | thanks i understand now! and 80hz -18db is what i have it on now. |
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