# PA1100.5 RMS power question.

roy7777
Posts:

**1**
Hi, I have a question about the PA1100.5 RMS power.

According to the Polk Audio website, the power is:

125 watts x 4 (2 ohm) and 600 x 1 (1 ohm) continuous power;

250 x 4 (2 ohm) and 1200 x 1 (1 ohm)

The speakers on my car are:

Front: Polk Audio db6750, 4 Ohms,

Rear: JBL P9633, 4 Ohms,

Subwoofer: RockFord Power T112D4, 2 Ohms,

Can I use the PA1100.5 on my car?

And what will be the RMS power output?

Thanks for any help.

According to the Polk Audio website, the power is:

125 watts x 4 (2 ohm) and 600 x 1 (1 ohm) continuous power;

250 x 4 (2 ohm) and 1200 x 1 (1 ohm)

The speakers on my car are:

Front: Polk Audio db6750, 4 Ohms,

Rear: JBL P9633, 4 Ohms,

Subwoofer: RockFord Power T112D4, 2 Ohms,

Can I use the PA1100.5 on my car?

And what will be the RMS power output?

Thanks for any help.

Post edited by roy7777 on

0

## Comments

2,586For example, if we look at the sine wave voltage at the output terminals of a power amplifier, we will find the RMS voltage to be the peak voltage (Epeak) divided by the square root of 2. If we measure the RMS sine wave current from the amplifier, we will see that, similarly, it is the peak current (Ipeak) divided by the square root of 2.

Multiplying the two, we get:

(E peak /(sq root 2)) * (I peak /(sq root 2)) = (E peak * I peak)/2

6Asking 400 for it.

PM me for further details.

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14,365sound quality competitor since 2005polkaudioMECA SQ Rookie of the Year 06 ~ MECA State Champ 06,07,08,11 ~ MECA World Finals 2nd place 06,07,08,09

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polkaudioSR6500 ---polkaudioMM1040 x2 -- Pioneer P99 -- Rockford Fosgate P1000X5D459i 4get what jvc said but if u look at the amps specificatioons on website it states 80w at 4ohms, so interiors r getting at least 80w a piece(meaning i'd b pretty careful setting those gains) sub it doesn't mention 2 ohms but if 1 ohm is 600, i'm betting 2ohms is about 3 or 400

1This is an interesting discussion. thank you for sharing

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