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Peak power on rs-939 how many watts ???

How many watts total is this reciever any one know and about how old is this stereo??

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Hi,I have two 250w speakers at 8ohms ,could someone tell me if I need to get a amp with higher watts than the speakers?k


Speakers are rated either at RMS (root mean square) average power or Peak Power. An RMS of about 125 watt is equivalent to 250 watt peak. To match the radio and speakers they both need to be consistent. Also do not be confused with total radio power out vs per channel.

So if the speakers are 250 watt peak power then a radio with 125 watt per channel or 250 watt peak per channel would be a good match.
If the speakers are RMS 250 watt then the radio would be 250 RMS/channel and usually with a four channel radio a total of 1000W RMS
With that much power the neighbors should hear you coming!

Dec 02, 2015 | Car Audio & Video

1 Answer

I'm new to the Car Audio seen.I just bought four 6x9's.Now I need a good Amp to push all four of them.Here's what I have.Sony XS-R6945 4 Way 6x9" 800 watt Full Range Car Stereo Speakers Power...


Look for a 4-channel amp that pushes 50 watts RMS @ 4 ohm.
Make sure the amp is CEA-2006 compliant.
Ignore peak or max watts as these are arbitrary numbers.

More info here - sparky3489.webs.com

Jan 24, 2015 | Car Audio & Video

1 Answer

How many watts per channel in a technical pro 1500 reciever?


Is that the RX113, or some other? The 1500 is informative, being peak power total. This is about 375 Watts/channel RMS, which is enough to blast the neighbours anytme.

Jul 12, 2014 | Audio Players & Recorders

1 Answer

Gt5 12 inch 275 watts how many watts of amp best?


Depends on what output your stereo is. If you underrate the speakers (speaker watts is less than stereo output), the unit will sound louder for a while, then you end up blowing your speakers with the excess distortion. If you overrate the speakers (speaker watts is higher than stereo output) the speaker will not operate correctly and the distortion can damage it also. Its best to get a close match. Slightly higher is better. It is important you know actual wattage output not PMPO ( Peak music power output) A lot of stereos are rated at PMPO. The higher number sounds great but in reality, the figure is the MAX output and by then the sound is distorting badly. Distortion ruins more speakers than anything else...

Oct 11, 2013 | JBL GT4-10 Car Subwoofer

1 Answer

Need to know the power in factory stereo


Includes features of premium AM/FM stereo/6-disc in-dash
CD/MP3 capability plus:
• 190 watts of peak power
• 8 speakers

Sep 11, 2012 | 2008 Ford Fusion

1 Answer

My stereo in 1997 chevy caviler is turning off and on when turned up to a high volume. I have a sony xplod 52 watt by 4 channel radio. With two 6x9 sony xplod 50 watt rms and 300 watt peak power in the...


Most likely cause is heat. The clearances behind the radio are often not sufficient to provde the proper air coolling that the higher power radios need. The heat sinks on the rear of the radio require a certain amount of air flow to dissipate the heat generated under high load conditions. If you add summer heat to the equation, you can have the radio going into thermal cutout to protect it circuity.

May 27, 2011 | 1997 Chevrolet Cavalier

1 Answer

Will i be able to swap the original speakers of the J520 with a pair of Sony SS-B1000, without causing damage to the new speakers? the Sony SS-B1000 has an Impedance of 8 ohms, and peak power of 120 watts.


Hi, As long as you like the way the speakers sound there is really no reason you cant use whatever speakers you want. To find out the approximate wattage of the stereo you are using look on the rear of the unit and you will find a tag that has " SPECIFICATIONS " on it. There you will see perhaps the a.m. and f.m. frequencies it's capable of receiving also there should be numbers saying something like" 100-240vac or 100-240v~ 50-60hz 1.2amp or 120watts.( if power is listed in amps only-1 amp's equivalent to about a hundred watts)Dividing the wattage by 3 will give you an approximate power out put. Example if your stereo draws 120 watts worth of 110 from the wall it will put out approximately 40 watts to each speaker. Changing from OEM speakers is all right as long as you don't try to hook up some 150 watt peak speaker to a stereo capable of just, say, 10 watts per channel. Doing this will eventually cause damage to the amplifier, not to mention causing about 30 percent total harmonic distortion-which take my word for you will know if you ever hear it! So long story short-use what you wish, just be careful not to overload the receiver-if the speakers are a bit to powerful for receiver you can lessen distortion by turning down the " BASS" as that takes the most power in a speaker. Thanks for choosing FixYa, I hope this helped-good luck, Prodzilla

Apr 15, 2011 | Audiophase J520 CD Shelf System

1 Answer

Mtx audio 4252 amplifier


Hello freshman_fox,

63 watts X 2 @ 4-ohms.
125 watts X 2 @ 2-ohms
250 watts X 1 @ 4-ohms bridged

Since no power rating is given @ 2-ohms in bridged mode, it means that the amp is only stable to 4-ohms.

The manual does not specify a peak power, but since RMS is about 70.7 of peak, that makes it 353.5 watts.

You can download the manual from here. Hope this helps.

Jul 10, 2009 | Car Audio & Video

1 Answer

Logic alx1280 2 ch amp


Amps can be rated based on their RMS power or their peak power. In this case, the amp's rated RMS power is 300x2 at 2 ohms (total 600W RMS) with a peak power rating of 600x2 (1200W peak). For the most part, peak power means almost nothing.

If your head unit didn't have RCA preamp outputs, you would used the standard speaker outputs from the head unit and connect them to the hi input plug of the amp.

Mar 17, 2008 | Logic Soundlab ALX1280 Car Audio Amplifier

1 Answer

Home stereos


Hi this is Compaqowner again NOTE: I know enough about home Stereos,and I am pretty sure to figure out 'power output' you take the total:in this case it takes in 110 watts total devide that by 2 so according to my math that is 55 watts (I guess this AKAI has a 55 watt amplifier) then you take the amplifier output (in his case 55 watts) and devide that by how many channels are being used,so in 5.1 DOLBY mode DVD movie,etc.(power to all 5 speakers) then it's 11 watts per channel,and in 2.1 stereo (power to the subwoofer,front right,and front left speakers only) it jumps up to a little over 18 watts per channel,again,I think?,when you find the answer,please let me know. Thank you for your time. Steve B.

Nov 03, 2007 | Audio Players & Recorders

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