KINGKONG69 said:
ive been in the car audio scene for a while, my last creation was a 93 isuzu rodeo, with 8 12" fosgate subs, runin off 1 comp. orion amp.
well i dont have my rodeo, but still have this amp. its 50 watts X 1 channel at 4 ohms and stable down to .25 ohms. my question is, i want to run just 2 subs in my new bronco. what subs would be my best choice. i want to be able to run the 2 subs at like 0.5 to 1 ohm to get the most booooooom. i perfer 12" subs, but might go 15".
is there a way to do this, run dual voice coil subs, wired in parelel or some shit. im t up on the tech end of this as much as i was before.
some simple rules on resistance, anytime you wire resistant loads in parrellel, you use the product over sum method. ex.
two subs @ 4ohm each wired in parellel.
RT(resistance total) = R1 X R2 divided by R1 + R2,
4 X 4 / 4 + 4
= 16 / 8 = 2ohms.
or you can use the reciprocal method
1/RT = 1/4 + 1/4
1/RT = 2/4
4 = 2RT
2ohms = RT
or you can follow a simple rule, since most people wire subs that have the same resistance, take the number of subs and divide it into the common resistance of the subs. so ,
4 subs @ 4ohms apiece. thats 4/4=1ohm.
ok, so your problem is you wanna get the most out of your orion amp. its rated at 50watts into a 4ohm load. i haven't kept up with orion lately, but are you sure its not a(225 HCCA model) 2 channel amp rated at 25X2into four ohms, because thats a big difference. that would make it 100watts x 1 channel into a four ohm load. big difference.
im gonna go on the premise that i am right. regardless the numbers can be translated. so, this thing is stable down to a bridged 1ohm load. so you need to present a 1ohm load with your speakers.
personally, i would do this with four speakers 4ohms apiece. so thats 4speakers/4ohms apiece = 1ohm load. perfect!
the increased efficiency of four speakers is better than just two dual voice coil speakers wired similarily. plus you get increased cone area. in other words,i would use 4 tens over 2 twelves, or 4 twelves over 2 fifteens. but i believe 4 tens would be a perfect match for this amp.
as far as subs, there are too many good ones to list, kicker, mtx, fosgate , etc, just too many. but i always preferred kicker in a sealed box. a nice tight bass sound that moved alot of real air.