1000 Watt total power but it does not give me the RMSper say....?

Question

All it says is Output power (RMS) : 4 x 125W, 2 x 250W does that mean that out of the total 1000 watts only 375 is RMS? Or is it a true 1000 watt RMS??? (This is a Home Theater System I am talking about) Philips HTS3555/37

Answer 1

rms is what the amp will put out continuous. peak is explosions or quick bass it will take the 1000watts.

Answer 2

It means that you have 4 channels that output at 125 watts RMS and 2 channels that output 250 watts RMS.

The total power rating is a misleading spec, because it sounds like you have a 1000-watt amplifier. Back in the day, stereo amplifiers were specified to say what the per-channel wattage was. So, if you had a 100-watt amplifier, that meant 100 watts per channel. Now, with multiple channels on surround sound receivers, they have multiple amplifiers. So, they combine the total wattage of all of the channels to be able to say, for example, that they have a 1000-watt amplifier. But, the actual maximum for any given channel is only 250 watts.

Answer 3

its 1000W shared over the out puts, either running 4 speakers at 125W each or 2 at 250W each. (bearing in mind the impeadance of the speaker 4ohm 8ohm etc) this also effects the over all output, but this should be on the description somewhere 125Watts @ 4ohms, or into 4ohms etc

RMS is the only figure you wanna look at (on a basic level) ignor PEAK ratings on adverts, RMS is the power the amp can provide indefinately

Answer 4

4x125 + 2x250 = 1000 total power. Total means total, NOT rms. RMS or average power is considered half to 1/4 of total power.

Answer 5

Maybe just repeating, but your amp has an RMS (actually not the correct term as it is used in amp ratings, but common nonetheless :) ) power output of 500W - either running 4 channels at 125W each, or 2 at 250W each.

Max output power DOES actually have a lot of relevance when it comes to home theatre.  The difference between RMS wattage and peak wattage is called "headroom" and is the area of power that your amp can crank out for small, short bursts like a big bass kick etc.

You will see cheaper amps may have an RMS wattage of say, 500W, and a max output stated as 600W, leaving just 100W headroom.  At high volume (high output power), you will get much more distortion, and as your amp is running at a much higher percentage of its maximum output, will overheat far quicker.  When big bursts of power are needed for bass kicks, explosions and so forth, they will be severely distorted at high volume because the amp will "clip" (cut off the peaks of the audio signal sinewave).

Your amp has a lot of headroom so you shouldn't need to worry about this.  Be happy with your investment as 4x125W is more than enough power to shake your house!  On a 90dB efficiency speaker (most are 88-92dB) each speaker, at 125W, could be pumping out 114dB volume, 4x this makes it around 120dB + room echo.... your ears will be ringing a long time before you use those 125W!