High end high quality int. amp for low level listening

@hshifi Thank you for your feedback. I actually have 1 SVS sb1000 sub with crossover set at 50hz. I agree it really makes a difference, especially at my listening habbits. 

More powerful amp = better at HIGH listening levelYou want amp with better LOW RESOLUTION DETAIL.The higher the power, the WORSE the low resolution detail gets.These are dictated by the laws of physics.Due to attention to execution you will see some variance though. Some high power amps can still do pretty decent low level detail, but same quality of execution will give way better low level detail with lower power.

@realworldaudio tbh i wasn't aware that higher power amps have lower resolution on low level listening. Can you name any specific integrates that have great resolution on low level listenings? 

These are dictated by the laws of physics.

(Does the quanta of an electron get bigger in bigger amplifier?)

@realworldaudio tbh i wasn't aware that higher power amps have lower resolution on low level listening. Can you name any specific integrates that have great resolution on low level listenings?

I would suggest some questioning of the factualness, and proof of various claims, would not be a wasted question for you to ask.

I do not want to come across as too harsh, but it is a low probability that all these solutions can exist simultaneously as optimum solutions.
(You have been told so far):

1. To use more sensitive speakers
   
2. More powerful amplifier
   
3. Use a less powerful amplifier
   
4. Use Subs
   
5. Use tone controls and loudness controls.

If it loud enough now, then we can exclude #1, #3 immediately. #2 we could exclude with a volt meter or an oscilloscope… Or I previously excluded it using just a pencil. 

At least three people mentioned tone and loudness controls for low level listening. Does your current amp/preamp have that?
There is a lot of info on the net about tone controls and Fletcher Munson curves.

That puts the #4 (sub) as potentially having some merit if it was I used as a way to have tone control.

If you are happy with it (which you said you were in the opening), then doing nothing is a pretty safe bet, and it is in between having an amp with more power and less power.

That leave #5 (tone controls), via a preamp, as being the only thing to look at that has any rational basis in fact.

The other reason to change things would be purely emotional. That is not bad, it is just not reasoned.

@holmz Thank you for your wise words. You remind me of person called 'jan.vigne'. He was a very knowledgeable hones and rational person active on stereophile and ecoustics forums (but sadly not here).