Don't know about your case specifically but for comparison I have 500w/ch Bel Canto ref1000m Class D that run my Dynaudio Contour 1.3mkII and other speakers I own. These Dynaudios like every bit of power you can through at them. I have yet to practically reach the point where either speakers or amp sound stressed in any way, and I listen quite loud on occasion.
My guess is your Dyns have better low end extension and that combined with teh C1 85db sensitivity that I read ups the ante for power exponentially as the frequency gets lower. More like my OHM F5s in that regard. The OHMs also like every bit of that power, and they read to be somewhat more efficient than the Dyn C1s.
So I suspect you need an amp with even more power into 8 ohms doubling into 4 to get all of what the speakers are capable of. Build quality on these Dyns is top notch, so unless damaged or defective, I doubt they are malfunctioning, though their power needs could be the source of teh problem.
My guess is your Dyns have better low end extension and that combined with teh C1 85db sensitivity that I read ups the ante for power exponentially as the frequency gets lower. More like my OHM F5s in that regard. The OHMs also like every bit of that power, and they read to be somewhat more efficient than the Dyn C1s.
So I suspect you need an amp with even more power into 8 ohms doubling into 4 to get all of what the speakers are capable of. Build quality on these Dyns is top notch, so unless damaged or defective, I doubt they are malfunctioning, though their power needs could be the source of teh problem.