Hifonics Brutus Amps - need power wire gauge

[PassatSport2015]

Got a 2015 Passat, pics only for attention.

Brutus Brx616.4 running 80 w rms x 4 @ 4 ohm

(30 a x2 fuses)

Brutus Brx1116.1d running 700 w rms x 1 @ 2 ohm

(60 a x 1 fuse)

Now should I get 120 amp fuse at the battery?

Not sure if I can get away with 4 gauge power wire or will I need 2 awg into 4 awg from the amps.

According to the calculations depending on the length. I need a 2 awg but a 150 a fuse.

* Total RMS Wattage times 2, then divided by 13.8 Volts equals Current Draw in Amperes

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[n2audio 5,000+ posts]

I'd run GOOD 4 awg to a D-block and 8's to each amp, but going larger is never a bad thing.

The size of your fuses has less to do with the amps and more to do with the size of your wire.

Good 4 awg can be fused at 120. Fusing lower is fine, just don't fuse higher.

Good 2 awg is good for up to 200A, but with those two amps I'd still fuse it at ~120. There's no reason to go higher, and having it lower just means a little more protection if the wire is ever shorted.

Those 60A amplifiers would probably never blow a 40A fuse unless you played a few minutes worth of full volume sine waves.

I've been running a 100A main fuse with 1500w rms (accurate to conservative ratings) worth of amp power for several yrs now.

 

[llebcire]

Those 60A amplifiers would probably never blow a 40A fuse unless you played a few minutes worth of full volume sine waves.

Agreed. The Brutus Brx616.4 won't pull much current unless you're running it as a 2 channel sub woofer amp into dual 4 ohm mono loads. If you're using it for mids and highs it doesn't need too much current.

-Eric