For multi amp setup, do I need a relay?

[blue fury 3]

I went on crutchfield and read a FAQ for multi amp and it said this

You'll need a relay on the turn-on lead to protect your receiver. A relay connected to the power antenna lead draws little current from the receiver, but supplies enough power to turn on all your amps simultaneously.

Since I dont have a power antenna I assume I could connect it to the ignition, but why cant I just do like how I want and splice the remote wire to the other amps? Ive never heard of using a relay for this.

AND does anyone know of a site where I can browse hi output alternators?

[emperorjj1 2]

you should be fine assuming your amp is a newer one (95+)

for high output alts... check out powermaster, ohio gen, iraggi alts, and high output alternators

[SouthPole1989 0]

i read somewhere that you can connect 2 amps to the headunit and be fine but after that you need a relay. or you could just wire in a switch from a 12V power source.

[emperorjj1 2]

ya i read the same... then i asked my boss an engineer and amp repair man and he said i would be fine... im hooking up 6 amps for 5200 of underated fosgate power

[JimJ 11]

For six amps I'd definitely look into using a relay.

Remote turn-on circuits are not that powerful, I'd much rather spend a couple bucks on a relay and socket than mess with the PCB on the head unit or have to send it out for repair...

[theabunai 3]

Funny someone asked this...

We just installed 5 amps in a mercedes...

Was wondering why the head unit kept blowing fuses.....

Figured out why...

Low voltage on the remote turn lead...

popped a relay on it and it was all good...

[blue fury 3]

here's another thing- ive never had to deal with relays before since everything Ive done has been really basic, single amp setups and all under 1000 watts. SO I assume theyre pretty easy to hook up, but what site sells this?

[JimJ 11]

Parts Express sells both Bosch relays and pre-wired sockets to plug them into...