I have looked everywhere for specs on my factory delco/bose radio (rpo YE2) on my 86 z28 and i can't find anything.i want to know how many watts it could make because i am replacing all the speakers and putting an amplifier in it, And if the radio can produce enough wattage for the front speakers i can just have an amp for the rear's.

 

you will need an amp for the fronts-radio output with the Bose is ~1/10 watt or less.

 

Don't the Bose/Delco radios have a amp built/attached in each speaker already?

 

The fronts just looked like regular speakers and the rears were replaced at some point with sony's and had a very bad wiring job.

 

A sine wave, 12 volts peak-to-peak, into 8 ohms, no distortion (i.e. no clipping of the waveform), both sides driven (i.e. neither speaker lead grounded: at any given instant, if one side of the speaker is being driven positive, the other is being driven equally negative), is around 3 - 3½ watts.

Factory radios were designed to drive 8 - 10 ohm speakers; but most replacements are 4 ohms. Some are only 2 ohms.

This is the approximate audio equivalent of plugging a 40 amp welder into a 20 amp circuit. Although, in the case of audio, it won't usually blow a breaker or damage anything (it might, but not usually); what it will do instead is, sound like crap esp at high volume, and not get as loud as it should.

I would recommend an amp for any aftermarket speakers behind a factory radio, no matter how much/little the radio might have been "rated" for, if for no other reason besides the impedance mismatch.