My exp. with Focal Sopra No.2 , Harbeth 40.2, Passlabs XA30.5 and Hypex NC400


Hello. Long time reader here.

I want to share my listening experiences since i bought my Sopra No.2’s last year. I think it may shed some light on people who suffered from brightness on their system. Please excuse my English as it is not my native language.

My other components are Primaluna Dialogue Premium Preamp and Gustard x20pro Dac with Singxer SU-1 via HQ-Player and Roon. Interconnects are DH Labs Silversonic and speaker cable is Kimber 8TC. My room is 45m2 and not treated. I would say my room has some echo and can sound harsh on higher volume levels. (I will deal with this later hopefully.)

I will try to keep it short below:

Sopra No.2’s with NC400’s:
Pros: Extreme clarity with huge sound stage , speed&timing , dynamism , attack , total control on bass , good instrument separation. NC400 allows all this without breaking a sweat.
Cons: Fatiguing after some time , especially with higher volume. Bright and forward on almost half of the music i listen to and neutral on the other half but never warm. (I listen to almost every kind of music though it’s mostly Jazz both with vocals and instrumental only.) Mids and low-mids(esp. on vocals) were not rich and full as i wished.

The fatiguing alone bugged me to change my speakers and my dealer sent me Harbeth 40.2’s to try at home.

Harbeth 40.2’s with NC400’s:
So compared to Sopra No.2’s it was less hi-fi and more of a live music experience with the midrange of Harbeth’s as we know it. Non-fatiguing , just slightly warm ,sweet sound and overall a wonderful match with the speaker and the amp. Believe it or not it was more than just a glimpse of when i listened to 40.2’s with Dan D’Agostino MOMENTUM LIFESTYLE AMPLIFIER. Last weekend we tried the NC400’s with my brothers SLH5’s and i think he is now considering selling his Naim setup which is 6 times more expensive then NC400’s :)

I wanted to keep Harbeth 40.2’s but we could not agree on price with the dealer so i kept my Sopra’s and decided to try a well regarded amp with it. That was Pass Labs XA30.5.

Sopra No.2’s with Pass Labs XA30.5 :
Brightness and fatiguing gone for good. You get the magical warm sound of Pass Labs , suddenly Sopra’s are different speakers now. The amp really has it’s own color as they say. Bass is less controlled and almost too slow compared to NC400’s. I was worried about 30w is not going to be enough for my room but i never miss 200w’s of NC400’s unless i listen to electronic dance music.

I am never selling my NC400’s as they will come handy when i want to listen instrumental tracks or EDM.
For example , Chuck Mangione - Children of Sanchez or Charles Lloyd & The Marvels - La llorona gives you goosebumps when listened through NC400’s while with XA30.5 they won’t impress you as much.
They are really more than their money’s worth but the XA30.5 is still a better match with Sopra No.2’s.

I guess i couldn't keep it short. Oh well..


tonediary
You've just discovered why amp/speaker matching is such a critical aspect of building a great system.

True, but I wouldn't say "discovered" , just experimented the importance of system matching in my case. I could not believe how much of a different speaker Sopra's were with two diff. amps. Same goes with Harbeth's , although Alan Shaw says his speakers sound the same with different amps if i remember right... 

I drive a pair of 1008Be's with a pair of pass xa100.5's and they are very smooth and detailed not harsh at all; all silver cabeling.  What little experimenting I have done it seems to suggest Focals like class A power and/or Tube amplification as I had a Cary Tube integrated driving them prior to the xa100.5's and they were not harsh at all.  I did try a pair of Herron M1a's ss class A/B and the harshness was there so I sent them back. 

Chuck 
You should think about addressing your untreated room before making your final amp decision.  Hard, reflective room surfaces paired with a wide dispersion loudspeaker can lead to the sound you've described.
Nice write up. Thank you for sharing your findings with the amps and speakers.

Have you considered speaker isolation? It may tighten up the bass and improve sound performance overall.
You should think about addressing your untreated room before making your final amp decision.

My room is close to "untreatable" if that makes any sense.  I have glass everywhere :(   I am thinking of doing some small treatment with acoustic panels here and there but not sure if it is going to make a noticeable difference. The start of this video shows the room before i changed my setup and speakers. It gives an idea on my acoustic problems :)  https://youtu.be/K94GoaT5FQI