Parallel Output Power

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frans-c

Copper - Posts: 77

Joined: February 14, 2006

Location: South Africa

Posted: March 02, 2006 at 1:25 PM / IP Logged

I have to two 4 ohm 800W 12 inch subs that I intend on wiring in parallel. Each sub is rated at a maximum power input of 200W RMS at a 4 ohm load.

The mono amp that I want to connect them to is rated at 400W RMS×1 channel at a 2 ohm impedence. Seeing that the two subs act as a single channel, will the amp send 400W to each sub, or 200W per sub for a total of 400W?

The amp is also rated at 200W RMS×1 channel at 4 ohms. Will a single sub handle the amp's power output better than the two combined?

How should I adjust the gain on the amp if I want to keep the parallel setup - only half-way for a power output of 200W at 2 ohms?

What is the sub's approximate maximum RMS input power at 2 ohms - 400W? The manual only specifies the subs specifications at 4 ohms. By the way, it's two Kenwood KFC-W3009 subs.

F R A N S

1985 Mercedes-Benz 230E

320 000 km / 199 000 miles

Full MB Service History

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Joined: November 01, 2003

Location: Alberta, Canada

Posted: March 02, 2006 at 2:29 PM / IP Logged

The subs will share the 2 ohm rating of the amplifer. So each sub will receive 200 watts of power if they are 4 ohm drivers and wired in parallel and the amp is capable of a 2 ohm mono operation. The single sub will handle the requirements no better than the dual sub setup will as the power to each speaker in each type of setup is the same. The sub does not have a 2 ohm rating at all, it is a 4 ohm only. A gain on a amp is a matching device, it is there to match the output of the headunit to the input of the amplifier. Ideally it should be turned down and not up. It is not a volume control. The amp does not make more power with the gain turned up at all, all it does it bring you closer to the brink of destroying a sub sooner than you think. Do a search for gain setting and read up on it.

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Parallel Output Power

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