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High end high quality int. amp for low level listening

Hello to all Audigon members.  I'm quite in a dilemma weather I should upgrade my amplifier. Currently I own Pathos classic one MK3 driving Sonus Faber Sonetto's speakers, and I must say I'm very happy with sound filling my 35 square meters room. However, it's known that the speakers are power hungry as they rated at 86db sensitivity and 4 ohm impedance and I think they will surely benefit from a bigger power supply. With all that being said I'm not sure if I will hear any improvement mostly because 90% of the time I listen at ~60dBs SPL. My budget is around 5k $ and these are the amplifiers I've been considering:  Hegel H390, Anthem STR, Cambridge Audio Edge A, McIntosh MA5300/MA252, Accuphase e280, Rotel Michi x3 or used Pass Labs INT 25, Mark Levinson 5805.

What do you think guys, will any of the amplifiers make ay difference at 60dB SPL ? 
celestial__sound
ditusa's avatar
ditusa
1,902 posts
 
@dcevans,
Agreed!
ditusa's avatar
ditusa
1,902 posts
 
’’Maybe you’re right. But there would have to be a reason why the sounded better.’’

Because efficiency and sensitivity are not the same. See: tech note
below page 1 section C:

/www.lansingheritage.org/html/jbl/reference/notes/tech1-3a.htm
holmz's avatar
holmz
2,328 posts
 
That TABLE 1 in section B right on page 1 says that the the high efficiency are the lest linear.

Are harmonics at play that make them sound better when playing low?
dill
2,545 posts
 
60dB listening volume is very low (medium TV level at 10ft.). Even taking into account your 86db sensitivity and 4 ohm impedance of the Sonus Faber Sonetto speakers. The Pathos will have more than enough power for your low listening levels. 
ditusa's avatar
ditusa
1,902 posts
 
@holmz,
The woofers in my speakers are the JBL 2234h. See: page 2 section C: internal design and construction last paragraph.

http://www.lansingheritage.org/html/jbl/reference/notes/tech1-3a.htm
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