Let me clarify some issues related to amplification for the Accordo. These speakers have been designed to be as transparent and dynamic as possible. In order to successfully achieve this objective I have used a unique woofer with a long-stroke diaphragm and low resistance in bass-reflex application, designed to offer the best impulse response. Although the Accordo can be driven by any amplifier, we recommend driving them with amplifiers with low output impedance and middle power output (40/70 W into 8 Ω and 80/150 W into 4 Ω). Too much power may result in too long woofer cone travel and consequently deterioration of signal quality.
If we use the Accordo with a tube amplifier or a solid-state MOSFET with high output impedance we may end up with not fully optimal bass control, and this may lead to uncontrolled cone travel. Needless to say that tube amps are generally not too good in this respect.
I use the Einstein integrated amplifier, nice sounding, but with not such good bass as tube amps.
Sincerely,
Franco Serblin