FEATURED 2 4ohm subs to 1 ohm (1 channel amp)

[Zach Lawson]

I have 2 1200watt skar audio subs. My buddy miswired them I believe when first installed and wired just a (+,-) from each subwoofer(4ohm) and ran it to the amp. It was played a total of an hour max closer to 45 min of actual play time.

I wired them now correctly I believe 4ohm to a 1 ohm load. Now I have the gain barely up and the subs sound great until during some songs it sounds like voice coil rubbing maybe ( that’s the closest thing I can say they sound like but only if I turn the subs up to a certain point. I bought them a week ago and can return them. I’m new to this and trying to learn any tips greatly appreciated.
I couldn’t run all positives and negatives touching because the enclosure is separated.

specs :

•Skar Audio RP-1200.1D Monoblock Class D MOSFET Amplifier​

•(2) Skar Audio SDR-12 D4 12" 1200W Max Power Dual 4 Ohm​

• 4 gauge skar audio power and ground wire & 16 gauge speaker wire

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[Doxquzme Premium Member]

With 2 dual 4 ohm coils on each woofer, you have 2 options on how to wire them up:

It doesn't matter if you use both the speaker inputs on the amp. they are summed.

 

[1aespinoza 10+ year member]

Now I have the gain barely up and the subs sound great until during some songs it sounds like voice coil rubbing maybe ( that’s the closest thing I can say they sound like but only if I turn the subs up to a certain point.

The way you had them before does not really pose a danger. On the contrary, they presented a higher Ohm load to the amp so the amp put out less power. The way you have them now is at the amplifier's lowest safe load so it puts out the most RMS power. In other words the subs are being pushed ~twice as hard per volume setting. Just set the gain properly to avoid that rubbing sound.