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amp matching sub


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thebidsocram 
Member - Posts: 10
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Joined: April 20, 2017
Location: Philippines
Posted: April 20, 2017 at 3:59 PM / IP Logged Link to Post Post Reply Quote thebidsocram
Guys,
i had a car audio set up already exist,
mono amp 850 watts output power, can handle 2 ohm load but im not sure it can at 1 ohm load
12'' sub 500 rms dual voice coil 2 ohm
i planned to rebuild a enclosure vent type and add another 12'' sub,
a total of 2 12''.
do i need to upgrade my mono amp?
if no, what whould be my wiring? parallel or series?
please note that this sub has dual voice coil.
please help
thebidsocram
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: April 22, 2017 at 11:22 AM / IP Logged Link to Post Post Reply Quote DYohn
What's the amp? If it's not rated for 1-ohm then you'll either have to buy one that is or wire your sub for 4-ohms.
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mtxtech 
Member - Posts: 17
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Posted: April 24, 2017 at 9:41 AM / IP Logged Link to Post Post Reply Quote mtxtech
If you intend on using two dual 2 subs, then you'll be fine because you can run a 2 dual two subs at 2 ohm stable.
posted_image
thebidsocram 
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Posted: April 24, 2017 at 9:57 AM / IP Logged Link to Post Post Reply Quote thebidsocram
thanks Mtxtech and DYohn,
I'll go for the option 2, series/parallel to meet 2ohm load.
if adding another sub, it will be a total of a 1000rms right?, but my mono block amplifier had only 850 rms output. is it enough? or do i need to upgrade?
thebidsocram
mtxtech 
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Posted: April 24, 2017 at 10:05 AM / IP Logged Link to Post Post Reply Quote mtxtech
Actually no, When you take two subs and combined them the rms is not added. As in its not 500rms+500rms= 1000rms.
It actually retains the 500rms continuous rating. What your doing is finding a amp that is 500rms at 2 ohm stable or what ever power the woofers are able to handle.
For example if the Minimum and Max Rms rating is 400-900 rms thats all the subwoofer can handle, It does not matter if you add another sub because the continuous rms rating is the same for both subs. Any more or less can damage the sub's.
In simple terms all your doing is changing the impedance and matching it to your amp.
thebidsocram 
Member - Posts: 10
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Joined: April 20, 2017
Location: Philippines
Posted: April 24, 2017 at 12:15 PM / IP Logged Link to Post Post Reply Quote thebidsocram
now i am confuse, im sorry.
you mean by adding another sub with same rms with another remains constant?
rms differ to watts in a specs of the sub?
thebidsocram
mtxtech 
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Posted: April 24, 2017 at 12:28 PM / IP Logged Link to Post Post Reply Quote mtxtech
yes, like i said. if you have two 500rms subs and combined them. they still are 500rms overall
the only thing changing when you combined them is the resistance in the Ohm load
thebidsocram 
Member - Posts: 10
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Joined: April 20, 2017
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Posted: April 24, 2017 at 2:17 PM / IP Logged Link to Post Post Reply Quote thebidsocram
posted_image
i think you misunderstood my friend.
thebidsocram
mtxtech 
Member - Posts: 17
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Posted: April 24, 2017 at 3:30 PM / IP Logged Link to Post Post Reply Quote mtxtech
This is accurate, but i think you didnt understand what i said.
thebidsocram 
Member - Posts: 10
Member spacespace
Joined: April 20, 2017
Location: Philippines
Posted: April 24, 2017 at 3:38 PM / IP Logged Link to Post Post Reply Quote thebidsocram
im sorry. now its clear to me your point is in the manner of ohms specificly. thank you so much.
im so excited for these...
appreciate you guys...
sooner and hope you where still there for my future confusions to answer...
thebidsocram

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