Disclaimer: I sell Quad.
You can buy the 99 in monoblock but the 909 is a stereo amplifier. The 909 is 140/8ohms, 250/4ohms. I don't think it is bridgeable. I've found it can easily drive speakers such as the quad 988 and magnepan mg-3a. Very sweet sounding with a wonderful midrange.
You can buy the 99 in monoblock but the 909 is a stereo amplifier. The 909 is 140/8ohms, 250/4ohms. I don't think it is bridgeable. I've found it can easily drive speakers such as the quad 988 and magnepan mg-3a. Very sweet sounding with a wonderful midrange.