Posted April 21, 20178 yr So I'm currently running one 2ohm 12 inch icon on a 1200 watt Cadence amp at 1 ohm.. in 2.4 cubes tuned at 29.. it sounds very good. But I want louder more spl.. as much as I can cram in the back of the bug without losing my backseat.... was initially going to move to a 15" X or zcon. Somebody here said my best bet would be to add a 2nd icon 12.. so that's my plan. I think I can squeeze 4.5 to5 cubes and was thinking 34-35 Hertz.. I definitely want to get a better quality amp even though I've had zero issues with the Cadence. It doesn't even get hot.. but I'm pretty set on the zapco St series amps. My question is how many watts should I give the icons. Without straining my electrical too much. Currently with the 1200 watts I have absolutely no dimming even with my brights on and bass hitting at maxx..they have a 1350 Watt a 1650 Watt. And a 2000 Watt.... keep in mind. This car is not a daily driver, just mostly for an occasional trip to work, car shows and hot rodding around town like an arseho a bit on the weekends. But I'm thinking 2000 Watts plus a couple hundred for my components is going to be too hard on my electrical. Will 1350 Watts be enough between two subs.. should I go for the 1650 ? I hope this isn't a stupid question
April 21, 20178 yr 46 minutes ago, SS Teacher said: Can you add a second battery and get the 2000 watt amp? 2000 watts should be nice. Upgrade your battery, and add a big one in the trunk. New SSA amps are coming soon, their 2200 w one looks good. If you could wait until they're out...
April 21, 20178 yr Author I have 2 group 78 800cca. 110-115 reserve capacity each...Unfortunately a 95 amp is the biggest alternator anyone makes for a aircooled vw.. the only positive side to an old bug is theres almost no electrical draw to the car other than the head and tail lights ..but at 1200 watts on the sub and another 250 on the components im seeing no dimming evin with the headlights on and bass cranked for 30+ mins.. and i rarely drive the car at night.
April 22, 20178 yr Personally, if I had to run class D, i would rather have 2 smaller amplifiers (one per sub) verses one larger amplifier. Just me.
April 22, 20178 yr 38 minutes ago, Randal Johnson said: Personally, if I had to run class D, i would rather have 2 smaller amplifiers (one per sub) verses one larger amplifier. Just me. Why is that?
April 22, 20178 yr Curious as well...I would do the opposite. D is your friend in that bug, as you found out electrical is a bitch otherwise.
April 22, 20178 yr 8 hours ago, jcarter1885 said: Why is that? Double the power supply strength makes for better output (dynamics) with about the same current draw. Also, if you decide to compete, this will keep you in lower classes for better chances on improvement. Like I said, just me.
April 23, 20178 yr 6 hours ago, ///M5 said: Curious as well...I would do the opposite. D is your friend in that bug, as you found out electrical is a bitch otherwise. So if he's running at one ohm now and drops to .5, even with a larger amplifier, he's going to be stressing his electrical. Correct ??? Running two smaller amplifiers, he can stay at one ohm and still have more than enough power for two drivers. Just a thought.
April 23, 20178 yr wiring for two 2ohm subs, your options are .5ohm, 2 ohm or 8 ohm. (Unless you go the amp each sub route, but not necessary) I think youd do well wiring for 2ohm, you can find a good class D amp (I have a Hifonics amp I used at 2ohm @ 1400rms). I doubt youd notice a difference between 1000rms a sub vs 700 rms a sub plus will be easier on your electrical. Edited April 23, 20178 yr by crackinhedz
April 23, 20178 yr 15 minutes ago, crackinhedz said: wiring for two 2ohm subs, your options are .5ohm, 2 ohm or 8 ohm. (Unless you go the amp each sub route, but not necessary) I think youd do well wiring for 2ohm, you can find a good class D amp (I have a Hifonics amp I used at 2ohm @ 1400rms). I doubt youd notice a difference between 1000rms a sub vs 700 rms a sub plus will be easier on your electrical. He has a dual 2 ohm sub wired down so the amp sees one ohm. Am I reading the Op's post correctly guys ???
April 23, 20178 yr You can wire a single dual 2ohm sub into either 1ohm or 4ohm two dual 2ohm subs can wire to .5ohm, 2ohm or 8ohm Edited April 23, 20178 yr by crackinhedz
April 23, 20178 yr 4 minutes ago, crackinhedz said: You can wire a single dual 2ohm sub into either 1ohm or 4ohm two dual 2ohm subs can wire to .5ohm, 2ohm or 8ohm I know this. Just making sure I was reading the Op correctly. Thanks
April 23, 20178 yr There may be other ways to wire (beyond my knowledge), I just go by the wiring diagrams here: http://www.the12volt.com/caraudio/woofer_configurations.asp
April 23, 20178 yr Author I do have a 2ohm sub wire to 1 ohm. I ordered another 2ohm sub. I was going to buy one of these 2 amps http://www.woofersetc.com/st-1650xm-ii-zapco-monoblock-1650w-rms-class-d-amplifier.html?gclid=CjwKEAjw_uvHBRDUkumF0tLFp3cSJACAIHMYgAx0U_IHYoH-PMLa8OVwgvtiH1ivB74IdvDMSE3woxoCRpfw_wcB http://www.woofersetc.com/st-2000xm-ii-zapco-monoblock-2000w-rms-class-d-amplifier.html Do i want 1ohm subs?
April 23, 20178 yr Author This is my current setup. I'm also planning on doubling the size of that box . Replacing both these amps . For the zapco amps . One for my Subs one for my components . I've got no room for three amps
April 23, 20178 yr 33 minutes ago, My63rag said: http://www.woofersetc.com/st-2000xm-ii-zapco-monoblock-2000w-rms-class-d-amplifier.html Do i want 1ohm subs? No, stick with your 2ohms. The amp you linked does 1400rms @ 2ohm. This ^^^
April 23, 20178 yr 15 hours ago, Randal Johnson said: Double the power supply strength makes for better output (dynamics) with about the same current draw. You will hear absolutely no gain. Zero. Nottta. For the OP it makes sense to do if he sticks with the impedance of subs he has, but not for any acoustic benefit.
April 23, 20178 yr Author I orders my sub last night. Im sure I still have time to change the impedance before they build it. And i need to recone my current sub. I can change to a 1 ohm if need be? And get the full 2000 watts fron the amp? Sorry for my ignorance.. its my first real build. Edited April 23, 20178 yr by My63rag
April 23, 20178 yr If you have to rebuild your current icon then yes going to 2 dual 1ohm subs will allow you to end with 1ohm impedance and will not be as harsh on electrical as half ohm would be. I believe what Randall was getting at is that you would be better running 2 suba at 1 ohm eaxh versus you trying to run the amp at half ohm which would cause the amp to pull more because your forcing it to work under nominal inpedance. Now if you have a good sub and dont have to recone then yes i would stick with the d2 subs and just wire at 2 ohm and run that zapco get your power out of it and make the subs move.
April 23, 20178 yr Author I have a good sub. But it's the old style with the inverted cone. And the new sub of course does not. Not to mention. I would like to have to Fresh Subs..So it's getting rebuilt either way. So I still have the option for 1 ohm or 2 ohm subs.
April 23, 20178 yr 1400rms @ 2ohm vs 2000rms @ 1ohm, would be splitting hairs. Not to mention the amp would run more efficient at 2ohm, with less chance of any [more] strain on your electrical. You gain the extra 12" cone surface, while not risking electrical. Thats my $.02
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