Sub-Amp ohm ratings etc

[Gareth Hill]

Does anyone understand the ohms on a amp when wired into a sub !

I want to run a amp that can do 1500wrms @ 1ohm but not sure what ohms the subs would need to be bought as.

They do the subs as dual 2 & 4 & 6 ohm !!!!!

I want to run 2 subs and 2 of the amps above ! Just not sure which ohm subs to buy ! Want the 1500wrms into each sub you see !

Can it be done wiring the subs up a different way

Sorry but i just cant get my head round this !

Thanks chaps

[wilmott]

i would try and explain it but will probably end up confusing myself


so try this link to get an understanding on how to lower the ohms.


http://www.crutchfieldadvisor.com/S-jRi ... s_faq.html


basically a dual voice coil sub can be run like the two subs that are explained.
a dual 4 ohm sub run in paralell will equal 2 ohms.
so you would need a 2 ohm dual sub to reach 1 ohm.


hope this helps and im not speaking complete tosh

[Goto10]

Ohms is the resistance the coil presents to the amp, wiring speakers in series would raise the resistance, wiring in parallel lowers the resistance.
Remember back to GCSE physics... Resistance total in series=R1+R2, in parallel it's (R1xR2)/(R1+R2) - assume R1 & R2 are 4 ohm, you can see that in parallel they'd present a 2ohm load if wired in parallel. So to present a 1ohm load to the amp you could run a pair of dual voice coil subs (2x 2 ohm subs). (Each a 2ohm load, 2x2=4, 2+2=4, 4/4=1)

[Gareth Hill]

Ohms is the resistance the coil presents to the amp, wiring speakers in series would raise the resistance, wiring in parallel lowers the resistance.
Remember back to GCSE physics... Resistance total in series=R1+R2, in parallel it's (R1xR2)/(R1+R2) - assume R1 & R2 are 4 ohm, you can see that in parallel they'd present a 2ohm load if wired in parallel. So to present a 1ohm load to the amp you could run a pair of dual voice coil subs (2x 2 ohm subs). (Each a 2ohm load, 2x2=4, 2+2=4, 4/4=1)

Thanks that has helped a great deal and now you mention it i actually remember !

Thanks