Class D vs Class A

Just looking at the specifications of both speaker and amplifier/s, this pairing may be powering the speakers on their low side. That's not to say it wouldn't be a good match but an in home audition would be a priority for me.

What I liked about my SE's were their ability to power my Eidolons at realistic listening levels without a hint of congestion or fatigue. By comparison I found some linear solid state amplifiers that had slight issues when pushed.

I evolved from the SE's to a pair of Hypex nCore 400 kits which are an interesting refinement in presentation yet still in the highly transparent switching amplifier theme. The nCores are now in my studio and I've gone back to big tube amplifiers in the main system.

My experience with driving NuForce SEs with an updated Audible Illusions Modulus 3A was that the preamplifier simply added far too much of it's own character and noise. Amp, preamp compatibility is most likely at the root of my dissatisfaction so this is not a blanket statement against tube preamps.

Understandably, this could be very desirable. When I substituted the AI with my current Reflection Audio Quantum the presentation opened up dramatically. The NuForce amplifiers are extremely quiet when driven by a battery powered preamplifier.

Also, I suggest experimenting with star grounding when using switching amplifiers.

Jdec, on the contrary, pardon my less than qualified attempt at explaining star grounding.

Essentially, everything gets plugged into a single power source, such as a power strip, sharing a single ground.

As switching amplifier technology progresses we are seeing less and less of the RF and EMI issues that some early designs produced which seemed to pollute the AC line.

If you are using different legs (breakers) of an AC system to power a system simply try using only one leg.