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<blockquote data-quote="|v|orphine" data-source="post: 7249220" data-attributes="member: 631008">Your 8 ohm subs connected &#039;&quot;parallel&quot; creates a 4 ohm load to the amplifier. You are running 2 subs with a 150 watt rms rating. Your amplifier will show ratings for a 4 ohm load. If it says it produces 300 watts at 4 ohm by 1 channel, this would be a good match for the rms ratings of your subs.. 300watts divided by 2 subs = 150w each.You want to push more then rated power to them and have headroom for future upgrades correct, so if the amp is rated at 400w at 4 ohm then you are pushing 200w to each sub, which is 50w more then the rms rating.You mentioned future upgrades to a possible (2) subs at 4 ohm svc, these 4 ohm subs wired parallel will give you a 2 ohm load to the amp. Now, that same amp described above will also give you a rms rating at the givin 2 ohm load, which usually doubles from the 4 ohm load. Your 300 watt 4ohm amp can produce 600 watt at 2 ohm. So when looking to upgrade your subs you can pick a ones that can handle 300w rms and are 4ohm voice coils.</blockquote>

[QUOTE="|v|orphine, post: 7249220, member: 631008"] Your 8 ohm subs connected '"parallel" creates a 4 ohm load to the amplifier. You are running 2 subs with a 150 watt rms rating. Your amplifier will show ratings for a 4 ohm load. If it says it produces 300 watts at 4 ohm by 1 channel, this would be a good match for the rms ratings of your subs.. 300watts divided by 2 subs = 150w each. You want to push more then rated power to them and have headroom for future upgrades correct, so if the amp is rated at 400w at 4 ohm then you are pushing 200w to each sub, which is 50w more then the rms rating. You mentioned future upgrades to a possible (2) subs at 4 ohm svc, these 4 ohm subs wired parallel will give you a 2 ohm load to the amp. Now, that same amp described above will also give you a rms rating at the givin 2 ohm load, which usually doubles from the 4 ohm load. Your 300 watt 4ohm amp can produce 600 watt at 2 ohm. So when looking to upgrade your subs you can pick a ones that can handle 300w rms and are 4ohm voice coils. [/QUOTE]

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