PL11z may allow use of 11 channels but most avr/avps only allow using seven channels at a time even if 11 are connected. Since there are no 11 channel amps out there you would need 2 amps to support 11 channels for separates. Although the AVRs support 11 channels they certainly don't have the power of separates. Check closely for the actual ratings. Most rate the output with only 2 channels driven yet state it as if all channels had the same output power. For the most part although there are 11 speaker channels there are only 7 amp channels.