questions/opinions on this set up

[4x4fun]

i have a feeling ill be at work tom drawing pics in paint, so i can show how evertyhing is interwoven to get usefull numbers lol

 

[mconn116]

thanks

yeah thanks guys, im really starting to figure it out now, alot of what my highscool electrical teacher was teachin us hah. Once
I see the diagram i will get it, thanks again

 

[4x4fun]

yeah thanks guys, im really starting to figure it out now, alot of what my highscool electrical teacher was teachin us hah. Once
I see the diagram i will get it, thanks again

the irony of all the times you mumbled "im never gonna need this shit in the real world"

and i get a home made pic up as fast as i can

 

[4x4fun]

ok this is just for a class "d" mono channel amp. and you can STFU right now about my drawing lol

in dia 1, everything is wired in parallel, the 4 ohms DVC speaker inside the box, is reduced to 2 ohms, x2. so you have two 2ohms loads comming out of your box. when you wire them in parallel you bring it down to a 1ohm load.

in dia 2 you still have two 2ohm loads comming out of the box, but you then wired the series, so you have a 4 ohms load.

parallel cuts the ohms in half. or mutliply by .5

series add the ohms together.

talking about amps.......its "harder" or takes more, for a amp to push a given number of watts with a higher ohm load. look at the spec sheets. (ie 1000w amp). it says it will push 1000w at 1 ohm.......500w at 2homs........250w at 4 ohms....... as it gets more ohms the less it can "push"

why is all this important.....one so everything is correct and you dont brake anything........two...... amps are the big ticket item when you get into car audio, (they do the work) the more you need your amp to push; because of ohms or watts. the more money it will cost. so if you can wire everything to a certain ohm load you can reduce the cost of needed amp.

you see how amps "work" with an ohm load......(hopefully lol) so useing my pics, if you went with a 4 ohms load @ 600rms. that amp could really put out at 1ohm.....and thats how there gonna base the price. so if you went with a one ohm load getting 600wrms at 1ohm, there gonna price it as such

another thing is making sure the amp is stable a said ohm load. class "D" are "normaly" stable at 4,2,1 some differ, some can do 1.5 ohm loads and 3 ohm loads if your running an odd number of subs. were as class a/b may not, some can. but there normally more $$$ but everything will have its own channel ideally, so there is no issue with funny loads.

as a rule of thumb class d are sub amps (mono channel ) and class A/B are speaker amps (5-1 channels)

but as i write up on class A/b amps you can look here

http://www.the12volt.com/

same thing better pics and all there caluators will let you change all the differnnt specs and see what you get. its really hand and can lett you see how it all works.

 

[mconn116]

wow alot of good info here, ill have to keep doing some research i guess, i dont want to rush into this ill do it right the first time

 

[mconn116]

ok so was doing some looking on crutchfield and found this diagram and i think this is how im going to wire my subs, http://www.crutchfield.com/Learn/learningcenter/car/amplifiers/sub_amp_guide.html?page=5
what yalll think about that set up? not sure about wiring the positive of one of the voice coils to the negative of the same voice coil but figured its legit since its on crutch field but how does that work? where that put my impedance at

 

[4x4fun]

ok so was doing some looking on crutchfield and found this diagram and i think this is how im going to wire my subs, http://www.crutchfield.com/Learn/learningcenter/car/amplifiers/sub_amp_guide.html?page=5
what yalll think about that set up? not sure about wiring the positive of one of the voice coils to the negative of the same voice coil but figured its legit since its on crutch field but how does that work? where that put my impedance at

thats series parallel. the two circuits inside each sub are wired in series, so each sub would be at 8 ohms inside the box, then take the two subs and wire them in parallel. to get a single 4 ohm load.... its legit.

but but your right for questioning that. casue part of what that link said is stupid. if you have a two channel amp, and two subs.....why make everyting one channel. why not have one sub on one channel and one on the other channel.

 

[mconn116]

thanks, but if i wire one sub to one channel and the other channel wont i not be gettin as much power to the subs as if i bridged them?
for example, say an amp is a 2 channel amp and at 4 ohms its rated at 125wrms x2, but that same amp is rated bridged at 4 ohms 500 wrms, or WAIT would that power then split and give 125wrms to each sub so it would be equal to if you jsut wired one sub to one chanel and the other sub to the other channel... ok I may have answered my own question, so basically its a whole lot more work to bridge a 2 channel amp to power 2 subs to get the same power as apposed to just running one sub to one channel of the amp and the other sub to the other channel in 2 different series circuits...right?

 

[mconn116]

I'm having a hard time finding a 2 channel amp that puts out enough watts rms to each sub, im thinkin i may be better off gettin a mono channel amp, just need to figure out if i want 2 ohm or 4 ohm dvc subs and if i should wire themin parallel or series, well back to the drawing board i guess
EDITk looked up some diagrams on on the12volt.com and think i have decided on my setup for subs finally! after alot of help from yall and alot of learning, i am going to run 2 of these http://www.sonicelectronix.com/item_14921_Polk+Audio+DB1240DVC.html
wired in parallel to this amp http://www.sonicelectronix.com/item_8651_Kenwood+eXcelon+KAC-X10D.html, that should get my 300 watts rms to each sub right? the amps a little more than what i wanted to spend but it should be well worth it

 

[4x4fun]

thanks, but if i wire one sub to one channel and the other channel wont i not be gettin as much power to the subs as if i bridged them?
for example, say an amp is a 2 channel amp and at 4 ohms its rated at 125wrms x2, but that same amp is rated bridged at 4 ohms 500 wrms, or WAIT would that power then split and give 125wrms to each sub so it would be equal to if you jsut wired one sub to one chanel and the other sub to the other channel... ok I may have answered my own question, so basically its a whole lot more work to bridge a 2 channel amp to power 2 subs to get the same power as apposed to just running one sub to one channel of the amp and the other sub to the other channel in 2 different series circuits...right?

 

[mconn116]

Thanks man, really learned alot and think im starting to really understand this stuff, now at the risk of being a pita, any opinions on this set up??
I was having a hard time finding a 2 channel amp and decided a class D monoblock was the way to go

ok looked up some diagrams on on the12volt.com and think i have decided on my setup for subs finally! after alot of help from yall and alot of learning, i am going to run 2 of these http://www.sonicelectronix.com/item_14921_Polk+Audio+DB1240DVC.html
wired in parallel to this amp http://www.sonicelectronix.com/item_8651_Kenwood+eXcelon+KAC-X10D.html, that should get my 300 watts rms to each sub right? the amps a little more than what i wanted to spend but it should be well worth it

 

[4x4fun]

I'm having a hard time finding a 2 channel amp that puts out enough watts rms to each sub, im thinkin i may be better off gettin a mono channel amp, just need to figure out if i want 2 ohm or 4 ohm dvc subs and if i should wire themin parallel or series, well back to the drawing board i guess
EDITk looked up some diagrams on on the12volt.com and think i have decided on my setup for subs finally! after alot of help from yall and alot of learning, i am going to run 2 of these http://www.sonicelectronix.com/item_14921_Polk+Audio+DB1240DVC.html
wired in parallel to this amp http://www.sonicelectronix.com/item_8651_Kenwood+eXcelon+KAC-X10D.html, that should get my 300 watts rms to each sub right? the amps a little more than what i wanted to spend but it should be well worth it

that will work. its easy to say " just dont use DVC sub" but as you do this for a while you will like what you like and and use stuff cause you want it. and there are little things you gotta deal with. like i had to find an amp that was 600wrms and 3 ohm stable. kinda a pain. but your getting it good luck

 

[mconn116]

Thanks I really apppreciate all your help along with everyone whos been putting up with my barage of questions, thanks again guys finally with all your help ive decided on a setup that should sound pretty good, now deciding on speakers and everything else should be easy haha