No you don't have to match impedance. In fact you're better off getting higher impedance spkrs -- & most after market spkrs are higher impedance anyway. Go for very "sensitive" spkrs i.e. their "dB/1w" rating should be 90 or more.
Does the impedance have to match?
I have a cheap all in one receiver/dvd. I want to upgrade the speakers that came with it. All the speakers that came with it are 3 ohms including the passive sub.
My question is do I have to change all the speakers to have the same impedance including the sub. Or could I just change the front and center speakers. It is connected to the tv in the livingroom. I only use it for watching football and movies. I have a 2ch set up in another room for music. My girlfriend likes the way it looks in the living room, so the receiver has to stay. I just want it to sound a little better without blowing it up.
My question is do I have to change all the speakers to have the same impedance including the sub. Or could I just change the front and center speakers. It is connected to the tv in the livingroom. I only use it for watching football and movies. I have a 2ch set up in another room for music. My girlfriend likes the way it looks in the living room, so the receiver has to stay. I just want it to sound a little better without blowing it up.