Parallel Or Serial?
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From: Canary Wharf - London
Parallel Or Serial?
Guys's
Thought I'd post this on our forum as not getting much help from our Yank friends in electronics.
Can anyone answer this question?
I have a Phoenix Gold Octane R8:0.4 (4x75W RMS at 4ohm)
I am going to get a 8" Dual Voice Coil 4ohm Rockford Fosgate Punch HX2 RFD2208 which is rated at 400W RMS (200W per channel)
If I bridge 2 channels to the sub and wire it in Parallel will it run at 2ohms Ok?
I was told that I may need to get a 2ohm DVC and run it in serial to get 4ohms for the amp to run in a bridged mode. Is this true?
Thanks
Thought I'd post this on our forum as not getting much help from our Yank friends in electronics.
Can anyone answer this question?
I have a Phoenix Gold Octane R8:0.4 (4x75W RMS at 4ohm)
I am going to get a 8" Dual Voice Coil 4ohm Rockford Fosgate Punch HX2 RFD2208 which is rated at 400W RMS (200W per channel)
If I bridge 2 channels to the sub and wire it in Parallel will it run at 2ohms Ok?
I was told that I may need to get a 2ohm DVC and run it in serial to get 4ohms for the amp to run in a bridged mode. Is this true?
Thanks
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Joined: Feb 2001
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From: Bournemouth
As I recall, my JL sub is a dual voice coil design each coil having a 4 Ohm impedance. My amp couldn't cope with a 2 Ohm load (coils in parallel) so I had to go for 8 Ohms (coils in series).
It still gets driven nice and hard though.
A quick check on your amp says it can cope with 2 Ohm loads when driven in stereo and 4 Ohms when bridged so I guess not.
Try the coils in series and see how it sounds. If it isn't loud enough then I guess you need to change something...
It still gets driven nice and hard though.
A quick check on your amp says it can cope with 2 Ohm loads when driven in stereo and 4 Ohms when bridged so I guess not.
Try the coils in series and see how it sounds. If it isn't loud enough then I guess you need to change something...
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The R804 Spec:
4 x 75 Watts RMS @ 4 OHM.
4 x 125 Watts MAX @ 4 OHM.
2 x 250 Watts RMS @ 4 OHM Bridged.
2 x 400 Watts MAX @ 4 OHM Bridged
So you can bridge it to 2 channels at 4ohms. But a sub only needs 1 channel.. So you're only using half the amp, unless you fit a pair of subs.
Anyway onto that channel you have the choice of:
a) 4 Ohm Single Voice Coil (SVC) Sub 250WRMS
b) 2 Ohm Dual Voice Coil (DVC) wired in series to present 4ohm load each coil would get upto 125WRMS
4 x 75 Watts RMS @ 4 OHM.
4 x 125 Watts MAX @ 4 OHM.
2 x 250 Watts RMS @ 4 OHM Bridged.
2 x 400 Watts MAX @ 4 OHM Bridged
So you can bridge it to 2 channels at 4ohms. But a sub only needs 1 channel.. So you're only using half the amp, unless you fit a pair of subs.
Anyway onto that channel you have the choice of:
a) 4 Ohm Single Voice Coil (SVC) Sub 250WRMS
b) 2 Ohm Dual Voice Coil (DVC) wired in series to present 4ohm load each coil would get upto 125WRMS
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From: Bournemouth
The spec I have is :
This shows 2 Ohms possible in stereo. 4 Ohms bridged which is normal.
At 8 Ohms you'll be safe as the current is reduced and won't stress the amp BUT you won't get the maximum power output. Instead you'll get about 125W.
Try it and see. If it isn't loud enough you could get a 2 ohm capable mono amp and bridge both stereo pairs to give you more power in the cab or just change the amp/sub.
This shows 2 Ohms possible in stereo. 4 Ohms bridged which is normal.
At 8 Ohms you'll be safe as the current is reduced and won't stress the amp BUT you won't get the maximum power output. Instead you'll get about 125W.
Try it and see. If it isn't loud enough you could get a 2 ohm capable mono amp and bridge both stereo pairs to give you more power in the cab or just change the amp/sub.