The C8.2 LP speakers of the company Electro-Voice are designed for installation in false ceilings or interior ceilings and distribute sound uniformly downwards. The impedance of them is 8Ω, which means they can be connected to an amplifier of similar impedance. However, you should also check the power of the speakers and the amplifier to ensure compatibility between them. These are 2-way speakers, meaning the sound frequencies are reproduced by two speakers, a tweeter for the highs and a woofer for the lows. A high-quality ceiling speaker can provide uniform coverage and satisfactory frequency response, so it can be used for speech reinforcement or for low-intensity music applications (background music).