Had a question about the wattage and ohm load of subs when hooking it up to an amp.

I have 2x JL Audio 12w3v2-D4 subs (4 ohm load 300 watt each)

i'm planning to get this amp: Cadence TXA-3002, it puts out
1. 4 Ohm RMS Power: 2 x 150 Watts @ 13.8 Volts
2. 2 Ohm RMS Power: 2 x 300 Watts @ 13.8 Volts
3. 4 Ohm Bridged RMS Power: 1 x 600 Watts @ 13.8 Volts

Do i look at both the ohm load and wattage of both subs when buying the amp? or just wattage?
In this case, that means that i can only choose option 3 which is: 4 ohm bridged: 1x600 watts
Or can i also do 2 ohms with 2x300 watts??
If so, what is the difference between bridged and nonbridged RMS power? please and thanks in advance!

 

You have to know what load your sub will put on the amp to see what wattage will be put out from your amp to see if the sub you have will handle it.

In either way, if you get the amp with the specs you listed, you will have to wire the sub's voice coils in parallel (connect both + together on the sub and both - terminals on the sub) to make each sub have a 2 ohm load. With each sub wired in parallel you can:

1.) Wire the subs to each channel individually to get the 300 watts per channel @ 2 ohms or
2.) Wire both the subs in series with each other to get an overall 4 ohm load and wire that to the 2 bridged terminals.

 

i have to take the subs out of the box to do this?

 

Depends on how the voice coils are wired up now. if they are wired in parallel inside the box (both positive terminals are connected together and both negative terminals on each sub are connected together), then u can either run each + and - terminal on the box to each channel, or if u are bridging it, you can just connect the + of one sub and the - of the other together on the outside of the box and then the 2 remaining terminals on the box, you can run those to the bridged amp + and - terminals.

if they are wired in series (on one sub, u have the + of one voice coil running to the - of the other, and then the 2 remaining terminals running to the box's terminal) then ull have to take them out and wire them in parallel

 

Crutchfield.