the only problem is that when speakers are connected in parallel, (as i assume these are..(its the standard way of wiring + to + - to -) the impedance drops by half..eg 2 x 8 ohm speakers in parallel = 4ohm impedance, add another 8 ohm speaker you get to appprox 2.9 ohms, add another 8ohm speaker and you get 2 ohms....so looking at his setup.. (and the capacity of the speakers is irrelevant even the small satellites they may be small but if they are 8 ohms they must be added int o the impedance equation).. he is already using 3 8 ohm speakers, the impedance on the amplifier driving this is already getting a bit low..of course if the original speakers are say, 16ohms, or are wired in series, then no problem..all that happens is the nominal power of the amplifier reduces..another example would be: 2 8ohm speakers in series = a 16 ohm load...lets say the the amp output power into 8 ohms is 200 watts, at 16ohms it reduces to about 125 watts, so ergo if you keep adding speakers in series you cant blow anything up it just gets quieter..in the real world though pretty much every speaker is wired in such a way that when 2 are added together it is in parallel..hence my advising to check the impedances of the speaker..mind you if the amp is say a 200 watt amp and you are only running it at 75 watts, you could prob even go to 1 ohm (IN THEORY!!!!!) for short spells, but the other issue is that at these low levels of impedance the amp can go DC almost instantly, and DC WILL burn out your voice coils in a matter of seconds...even just dropping a mic is enough of a spike for the power rails to go DC.....i am just advising caution NOT doom and gloom..