"I don't like burning all those watts in the amps for nothing and it is not sensible ecologically"
FTR, in case anyone else is wondering here, when you run a receiver without hooking into the amp section with your speakers, you are not running a load off your amps in the receiver! Unless you have a load (resistance) in the circuit using the speaker connections, they are not producing power consumption, as you are assuming here. So, you're not burning up the ecosystem so much faster, and wasting power, as you're presuming here. Yes, there's power being consumed to power the receiver, run the processing, preamp, and such, but not nearly as much power is being used as when you use the amps in the receiver. FYI.
I'm pretty sure that's right anyway. Maybe someone with differing opinion can weigh in if they know otherwise. But I'm pretty certain that's about right.
FTR, in case anyone else is wondering here, when you run a receiver without hooking into the amp section with your speakers, you are not running a load off your amps in the receiver! Unless you have a load (resistance) in the circuit using the speaker connections, they are not producing power consumption, as you are assuming here. So, you're not burning up the ecosystem so much faster, and wasting power, as you're presuming here. Yes, there's power being consumed to power the receiver, run the processing, preamp, and such, but not nearly as much power is being used as when you use the amps in the receiver. FYI.
I'm pretty sure that's right anyway. Maybe someone with differing opinion can weigh in if they know otherwise. But I'm pretty certain that's about right.