Hello. I have a Cadence TXA-3002 powering type r components up front with a 4 gauge power wire. Do I have to upgrade the power wire to 0/1 gauge if I decided to add another amp for a sub? The amp I'm looking at is the Alpine MRP-M650 to power one type R sub.

Here are the specs of the cadence amp.
4 Ohm RMS Power: 2 x 150 Watts @ 13.8 Volts
2 Ohm RMS Power: 2 x 300 Watts @ 13.8 Volts
4 Ohm Bridged RMS Power: 1 x 600 Watts @ 13.8 Volts

Specs of the Alpine.
400 watts RMS x 1 at 4 ohms (600 watts RMS x 1 at 2 ohms)

Total RMS would be 900 watts.

Is that okay for a 4 gauge power wire?

 

I would. Or just run anothor 4 gauge and call it a day. It would be cheaper.

 

I don't want to run another 4 gauge. I was wondering if its okay to use the existing 4 gauge with a distribution block and two 8 gauge wires to connect the amp.

 

you would be fine. But anything over 600 watts on a sub amp I like to run it on its own power lead. Or I'll go with 1/0 and share it.

 

Use the 4ga for the sub amp and run an 8ga for the Cadence.

As mentioned a separate power lead for the sub amp is a better way to go, a splitter block just adds a lot of connections, [resistance], and a 600W sub amp, cranked, will draw power from the the high-pass amp if the high-pass amp is closer, [12V+ power circuit] to the sub amp then the sub amp is from it's power, [batt.], "electricity takes the coarse of least resistance". 94

 

So it looks like I have to run another wire.
In that case, wrx-killer-Sti-eater suggested another 4 gauge but 8 gauge will be cheaper.

I'll probably just do the 4 gauge as suggested by wrx.

Thanks fcm and wrx for shedding some light on my dilemma.


Modified by sirg-vtec at 1:10 PM 1/5/2008

 

As long as the high-pass amp is within 12-15 feet of the batt. it does not need anything bigger then 8ga, although a 4ga can't hurt, either way make sure to use an ANL fuse, not the cheezy AGU glass fuses. 94

 

Done and done.

Thanks.