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Old 02-03-2020, 01:07 PM   #1
HeresMyMind
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3 way Component Set - AMP of Head unit power?

I just picked up a 3 way component speaker setup (Focal 165 AS3's). Is it better to install these powered off the front speak power directly from the head unit, or to use the AMP power to the door speakers.

The speakers are a 4 ohm, 80watt rms 160 peak.

I know the AMP from the car is 140 peak (2 x 70watt) but is 2 ohms.

The Sony head unit I have is 25watt rms 50 peak per channel.

trying to figure out best way to power them until I can save up for a nice amp.

-B

( Speakers in question: https://www.focal.com/en/car-audio/c...t-kits/165-as3 )
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Old 02-03-2020, 09:55 PM   #2
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i wouldn't bother installing them until getting a 6 channel amp to go full active and ditch the passive crossover.

no matter how you split it, if you install them now, it involves running wire, and then re-running everything again once the new amp is installed.
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Old 02-03-2020, 10:21 PM   #3
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Quote:
Originally Posted by soundman98 View Post
i wouldn't bother installing them until getting a 6 channel amp to go full active and ditch the passive crossover.

no matter how you split it, if you install them now, it involves running wire, and then re-running everything again once the new amp is installed.
They run off 1 crossover. I wired them to the front wires directly from the head unit.

It will be very easy to run a wire from a serrated amp to them when I upgrade. The crossovers are under the dash.

They sound fantastic and have so much bass. I canít wait to throw some real power at them.

-B
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Old 02-03-2020, 11:32 PM   #4
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Yes, they can work off the passive crossover. But they can work even better giving each driver it's own amp channel and custom crossover point.

I had significant previous issues with a passive crossover introducing distortion to the tweeters, so i avoid passives wherever possible. It's also much easier to set and alter the gains to change the output of specific drivers if they're not well matched for my ears.
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Old 02-04-2020, 03:44 AM   #5
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Since you have an aftermarket head unit you can get away from powering off the head unit.

I wouldn't recommend going off the factory amp, 2ohms going into 4 ohms doesn't play well after a while.

As you said and soundman said wait till you save for a nice 4-6 channel amp. If you can.
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