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If you mean stored energy in the thermal mass of the room, then no. - foam insulation has an extremely low thermal mass - that's the point, it's a good insulator not a good energy store; the insulation is behind a thin sheet of plasterboard; the whole construction provides insignificant heat...

Stupid? Beware of arrogance. It's not nice from anyone. Go and reread and think carefully. As I said - every source of heat: every 15W amp, every 5W light bulb has an effect - and a cumulative effect. Particularly in a Passivhaus spec building. My renovations were't at passivhaus levels but...

Of course it does. Don't focus on the 15W. Any source of heat will have an effect on the heat requirement of the heating system in that room together with all the other sources of heat in that room. You're an engineer; you know this. Not relevant is how much of an effect this will have. As it...

Depending on your local climate some of it may be "wasteful". When your heating system is on, background energy consumption/heat generation from other devices is not wasteful, it's just another source of heat

Depends In the winter it's removing (using Barrows calculations as a finger in the air) a 12W requirement from the heating system. (My radiators each have independent smart thermostats, so they will compensate for whatever heat the amps are providing) In the summer (and in the North of England...

Nothing untoward will happen My nc400 mono blocks have been powered up for several years

Stick with bare wire :)

Jesse's first diet tip - my younger son mostly eats bourbon biscuits. He's 27

And Chips and mushy peas

LX mini fishtank anyone?

Isn't your buffer already inherently a single-ended to differential convertor? For those who already understand the benefits of differential, an additional $15 sub circuit isn't going to offer anything. So I guess it's down to what proportion of your customers will use single-ended sources...

My dual mono application is simple. My amps are behind my speakers with about 40cm of speaker cable (which will be shortened one day :)) I can't understand long speaker cables I'm very interested in applying, and the stability of, the remote feedback sensing :cool:

Power up noises - delayed power up/stable supplies is handled by the hypex smps

Is that a problem?

Leave the input impedance alone. Look at the amp's gain as part of overall system gain/signal-to-noise See if you can increase the signal to noise ratio of the preceding stage

So with infinite source impedance it produces noise - picked up through input traces possibly. This isn't how it's intended to be used/will be used in real life With zero source impedance it's silent If you want a final sanity check, connect 1.2k between + and - It should still be silent. With...

Do you mean without anything connected?

@TimoJ Too much noise upstream. Yes

If you're using balanced inputs, then simply short + to - Ground has no meaning/relevance to the balanced input ... But you should get the same result - silence

Indeed. Ignore the distraction and carry on debugging your installation