corsakiz
Member
Registered: 28th May 06
Location: Shropshire
User status: Offline
|
Hi i was wondering if anybody can give me any advise on the set up that im about to buy.
I have just purchased a Rockford Fosgate Subwoofer (500 Watt RMS) And it has Dual 4 Ohm Voice Coils.
I have been looking around on the internet and have seen a few Amp's that i like.
The one i like gives out
300 Watt RMS @ 2 Ohms
150 Watt RMS @ 4 Ohms.
I was wondering why these amps only give out half as much power (RMS) if your sub is 4 ohm?
Is there difference in sound quality between 2 Ohm and 4 Ohm?
Also if i hooked my Dual 4 Ohm subwoofer up to this Amplifier and it Receives 150 Watt RMS will it sound good?
And will it sound better than the 2 Ohm sub recieiving 300 watts?
Thanks for your help peeps
|
b4l
Member
Registered: 7th Feb 06
User status: Offline
|
ohms is a measurement of resistance and so if the resistence is 2ohms (low) the power given out (rms) will be high
and vice versa
there is no difference in sound quality between running at 2ohms and 4ohms
do not buy this amplifier!!!!
your sub needs 500 watts rms
this amp will seriously under power the sub
if you buy this amp it will send a source of "dirty power" to your sub
this dirty power will heat your voice coils in the sub and cook them to a crisp (very bad and smelly)
by underpowering a sub you can also clip it which again fries the voice coils and will sound pap
ill have a quick look and see if i can find you a suitable amp
do you have a budget for the amp?
|
b4l
Member
Registered: 7th Feb 06
User status: Offline
|
http://www.justkenwood.co.uk/stock01/kac8152d.asp
550w rms @ 2ohms
so wire your voice coils in parallel to run your sub at 2ohms
and this amp will power it with no problems at all
|
b4l
Member
Registered: 7th Feb 06
User status: Offline
|
got your pm
most (like 99%) amplifiers can run at both 4ohms and at 2ohms
generally subs are run at 2ohms
regarding the 500rms 2ohm £100 amp
: have a look at the rms value at 4ohms (it will be low)
regarding the 500rms 4ohm £230 amp
: have a look at the rms value at 2ohms (it will be high)
now compare the rms values of the amps, hopefully you will see that the more expensive amp has more overall power
yes you can wire your dual 4ohm sub to run at 2ohms stable
heres my mint scheamatic made in paint
http://img415.imageshack.us/img415/5696/mymintschematic6zw.png
i think that explains it
anything else you need to know mate just ask
|
