Can an amp be fatiguing?

[shelly_d]

There is a possibility of some compatibility issues as well. The Polk's are rated as 6 ohms, however, most complex speaker systems have a tendency to dip below their rating somewhere in the sound spectrum. The NAD is good down to 2 ohms. I could not find the spec for speaker loading on the Yamaha. It is a home theater unit I believe. That probably (this is a guess) means it is rated for 8 ohm speakers. It may vary well be that the Polks dip down low enough in impedance to draw more current then the Yamaha wants to deliver.

Just some food for thought.

Good luck with the system.

Shelly_D

 

[Lavane]

Or...... sell the Yamaha and use the proceeds to add a sub. You love the Yamaha sound but it just lacks a bit of oomph so give it a little bit with a sub. No need to reinvent anything - just add what you want. It will be a lot easier and more likely to get you to where you want to be. It's what I would do - I like the paths of most likely to succeed.

If the SDA's dig ad deep as the Monitor 10's I have, an amp with mirw oomph, or a powered sub would defenetly help. I have a sub connected to my 10's at the moment, but it only gets turned on if I've selected thrower powered amp I have in my system. I don't need the sub when I have my mono blocks selected.
Also as mentioned, some bass traps could help some too.

 

[rustybones]

Can you change the output level of the Mac? I have a Wiim Mini I stream Qobuz through, I've noticed that some of my modest collection of receivers and integrated amps like the output to be 200mV, others 500mV. Seem like some equipment is more tolerant or sensitive of that line level input signal. If the input is too 'hot' it sounds compressed and a bit 'oppressive'.