when is a speaker considered full range?

Full range implies that the speaker can output, under suitable conditions, the full range of human hearing. According to most audiologists, human hearing extends down to about 20Hz. Looks like your speakers extend to 40Hz, so not quite full range. Depending on the size of your room and the type of music/recordings you listen to, 40Hz may be all you need, however.

Thanks for the responses.I'm not well versed in reading specs.So if i may ask in setting my crossover for the mains in my receiver i currently have them set to 60 being they go to 40 sould i change the setting from 60 to 40?

Definitely not. Mebbe even raise it a bit.

Kal

Why don't you try the various settings and see which one sounds the best to you? You're talking about setting the point where the subwoofer takes over. Try different settings and see where the best blending is.

As frequency increases (towards 20 KHz) and decreases (towards 20 Hz) the loudness decreases. The range of a speaker is usually stated as the frequency where the loudness is decreased (rolled off) by 3 dB compared with loudness at a reference frequency of 1 KHz.

Missing from this definition is any mention of the loudness level at which the measurements are made. Many small speakers claim "full range" response (down to near 20 Hz) but this is only true at relatively low volume. My custom subwoofer system consists of three 15" drivers and three 12" drivers, and it only begins to feel like a pipe organ with all the stops out.