# Need help specing Car Audio :) **URL:** \ **Category:** NYSpeed Off Topic\ **Created:** [September 22, 2008, 11:23am UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293 "2008-09-22T11:23:18Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![KuntryQuestTSi](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kuntryquesttsi/32/5010_2.png) [@KuntryQuestTSi](https://forums.speedlife.net/u/KuntryQuestTSi)\ **Post date:** [September 22, 2008, 5:23pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/21 "2008-09-22T17:23:09Z")
crossfire amps are nice. never really head an issue with them. ---
**Author:** ![Willybeen](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/willybeen/32/7351_2.png) [@Willybeen](https://forums.speedlife.net/u/Willybeen)\ **Post date:** [September 22, 2008, 5:36pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/22 "2008-09-22T17:36:25Z")
trade me the club for a 10" sub then ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [September 26, 2008, 2:47pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/23 "2008-09-26T14:47:57Z")
well i gave in. i’m going to be using my alpine cda-9811 to simplify this thing and save a lot of money and frustration. i still am pretty bad with this stuff though. next question: > **[500CDA9815.PDF](https://images.crutchfieldonline.com/ImageBank/v20090127124300/Manuals/500/500CDA9815.PDF)** > > 1600.15 KB on page 38, if i use items 10-17, will that use the amp power from the head unit or the factory amp? the goal is to use my alpine unit amp for the primary 4 speakers, then connect my separate sub amp to connection 22. i will either eliminate the monsoon amp function, or use it for the far rear 4x2’s for some filler. thanks for any help, its much appreciated ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [September 26, 2008, 3:12pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/24 "2008-09-26T15:12:28Z")
and to layout the big picture… this is what i have planned so far: **Head Unit** Alpine CDA 9811 ![http://akamaipix.crutchfield.com/products/2003/500/h500cda9811-fp.jpg](http://akamaipix.crutchfield.com/products/2003/500/h500cda9811-fp.jpg) RMS Power Output 23 watts Peak Output 50 watts CEA Compliant — RMS Power Bandwidth N/A Preamp Outputs 6-channel Sub Preamp Outputs Yes Preamp Voltage 4 volts **(4) 6.5" Coaxials** (fed by alpine cda 9811) Polk db651 6.5" ![http://www.circuitcity.com/IMAGE/product/enlarged600/plk/PC.PLK.DB651.CN.JPG](http://www.circuitcity.com/IMAGE/product/enlarged600/plk/PC.PLK.DB651.CN.JPG) RMS - 60 Freq 35hz-22khz peak - 180 **Rear Filler** maybe use stock 4x2 fed by stock monsoon amp **Subwoofer** ![http://www.edesignaudio.com/gallery/568_large.jpg](http://www.edesignaudio.com/gallery/568_large.jpg) Model Name : NINe.2 Amplifier RMS Power @ 12.5v : 2 x 100W @ 4 Ohm, 2 x 200W @ 2 Ohm RMS Power (Bridged) @ 12.5v : 1 x 400W @ 4 Ohm ![http://www.edesignaudio.com/logos/11kv2_logo.gif](http://www.edesignaudio.com/logos/11kv2_logo.gif) Model Name : 11Kv.2 Subwoofer Available Voice Coils : Dual 2 - or - Dual 4 Power Handling : 300/600 WRms ---
**Author:** ![garbs](https://avatars.discourse-cdn.com/v4/letter/g/3d9bf3/32.png) [@garbs](https://forums.speedlife.net/u/garbs)\ **Post date:** [September 26, 2008, 6:11pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/25 "2008-09-26T18:11:27Z")
Good call on the Polk db series…I had 4 of them in my previous car and they sounded great (although they were components not 2-way). Drop the rear filler speakers all together, with the 4 2-ways you’ll have, you won’t need them. ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [November 19, 2008, 6:01pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/26 "2008-11-19T18:01:32Z")
quick question… went with the the Nine4 amp, and 2ohm DVC sub. 2 channels will feed my front two door speakers @ 4ohms, and the other two channels will be bridged to feed my sub at 2ohms, which is the most (or least) the amp can handle. my question is, do i hook the DVC sub up in parallel or series? here are the specs: sub: [http://www.edesignaudio.com/product\_info.php?t=0&products\_id=30](http://www.edesignaudio.com/product_info.php?t=0&products_id=30) amp: [http://www.edesignaudio.com/product\_info.php?cPath=1\_22&products\_id=46](http://www.edesignaudio.com/product_info.php?cPath=1_22&products_id=46) and if my math is correct, i can expect about 300w rms to feed my sub while my other two channels are supplying 65w rms? forgive my noobness ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [November 19, 2008, 6:44pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/27 "2008-11-19T18:44:58Z")
someone answer plz thx ---
**Author:** ![Firehawk853](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/firehawk853/32/7607_2.png) [@Firehawk853](https://forums.speedlife.net/u/Firehawk853)\ **Post date:** [November 19, 2008, 7:18pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/28 "2008-11-19T19:18:50Z")
> [@turbo ls1 ss](#): > > quick question… > > went with the the Nine4 amp, and 2ohm DVC sub. > > 2 channels will feed my front two door speakers @ 4ohms, and the other two channels will be bridged to feed my sub at 2ohms, which is the most (or least) the amp can handle. > > my question is, do i hook the DVC sub up in parallel or series? > > here are the specs: > sub: [http://www.edesignaudio.com/product\_info.php?t=0&products\_id=30](http://www.edesignaudio.com/product_info.php?t=0&products_id=30) > amp: [Loading...](http://www.edesignaudio.com/product_info.php?cPath=1_22&products_id=46) > > and if my math is correct, i can expect about 300w rms to feed my sub while my other two channels are supplying 65w rms? > > forgive my noobness UGH painful you are. Series wiring Each coil at 2 OHM wired in series = 4 OHM Parallel wiring each coil at 2 OHM = 1 OHM :banghead: ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [November 19, 2008, 7:22pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/29 "2008-11-19T19:22:38Z")
hmm… i dunno if this amp can handle 1ohm. it is the combo they recommended, and they offer the same sub in a dual 4, which could be wired to 2. so i dont understand why they’d give me this one if i can produce most out of 2 ohms ---
**Author:** ![KuntryQuestTSi](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kuntryquesttsi/32/5010_2.png) [@KuntryQuestTSi](https://forums.speedlife.net/u/KuntryQuestTSi)\ **Post date:** [November 19, 2008, 8:44pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/30 "2008-11-19T20:44:12Z")
well you should be able to run the sub and amp at 4 ohms right? ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [November 19, 2008, 8:52pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/31 "2008-11-19T20:52:16Z")
yes. if i run two of the channels at 4 ohms, do i have to run the bridged two channels at 4 or can i go to 2? the front two channels will be supplying coaxials at 4 ohms each. ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [November 19, 2008, 8:52pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/32 "2008-11-19T20:52:43Z")
Model Name : NINe.4 Amplifier RMS Power @ 12.5v : 4 x 65W @ 4 Ohm, 4 x 100W @ 2 Ohm RMS Power (Bridged) @ 12.5v : 2 x 150W @ 4 Ohm ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [November 19, 2008, 8:55pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/33 "2008-11-19T20:55:21Z")
i was thinking i would be getting close to 300w rms for the sub. im not looking for brute power, im looking for SQ with some thump. but im starting to think i should have gone with the dual 4 instead of the dual 2, BUT THAT IS WHAT THEY RECOMMENDED :gotme: obviously i would want to get the most out of the setup, and the sub is just getting into the recommended power at 300watts rms ---
**Author:** ![KuntryQuestTSi](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/kuntryquesttsi/32/5010_2.png) [@KuntryQuestTSi](https://forums.speedlife.net/u/KuntryQuestTSi)\ **Post date:** [November 19, 2008, 8:55pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/34 "2008-11-19T20:55:51Z")
you just anwsered your own question ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [November 19, 2008, 9:04pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/35 "2008-11-19T21:04:58Z")
what, should have gone dual 4? ---
**Author:** ![Shockwave179](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/shockwave179/32/7496_2.png) [@Shockwave179](https://forums.speedlife.net/u/Shockwave179)\ **Post date:** [November 19, 2008, 10:52pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/36 "2008-11-19T22:52:17Z")
> [@turbo ls1 ss](#): > > and the sub is just getting into the recommended power at 300watts rms I think the rms for that sub is 300 and the max is 600 so if you’re setup has about 300 going to the sub then it should be perfect. ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [November 19, 2008, 10:56pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/37 "2008-11-19T22:56:23Z")
ya but i think the amp only supports 150watts bridged at 4ohms. i need to bring it down to 2ohms to make closer to 300watts, and since i have a dual 2ohm voice coil sub, i can only get 1 or 4 ohms depending on how i wire it, if i am thinking this correctly. ---
**Author:** ![Shockwave179](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/shockwave179/32/7496_2.png) [@Shockwave179](https://forums.speedlife.net/u/Shockwave179)\ **Post date:** [November 19, 2008, 11:06pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/38 "2008-11-19T23:06:47Z")
> [@turbo ls1 ss](#): > > ya but i think the amp only supports 150watts bridged at 4ohms. i need to bring it down to 2ohms to make closer to 300watts, and since i have a dual 2ohm voice coil sub, i can only get 1 or 4 ohms depending on how i wire it, if i am thinking this correctly. I follow what you’re saying I think… So basically you think you bought an underpowered amp? ---
**Author:** ![turbo\_ls1\_ss](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/turbo_ls1_ss/32/7303_2.png) [@turbo\_ls1\_ss](https://forums.speedlife.net/u/turbo_ls1_ss)\ **Post date:** [November 19, 2008, 11:17pm UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/39 "2008-11-19T23:17:11Z")
no, i think i bought the wrong voice coil sub. D2 DVC vs D4 DVC. they recommended the D2, but i think they screwed up and i should have got a D4. ill talk to their tech department tomorrow and get it situated. like i said im looking for SQ not deafening thumps. i had a baby amp fueling my 12" JLw0 in my blazer back in the day and that hit pretty hard. i see too many 12310293 watt shit amps powering shit subs and it sounds like shit. ---
**Author:** ![theblue](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/theblue/32/5074_2.png) [@theblue](https://forums.speedlife.net/u/theblue)\ **Post date:** [November 20, 2008, 9:23am UTC](https://forums.speedlife.net/t/need-help-specing-car-audio/55293/40 "2008-11-20T09:23:19Z")
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