Distortion and popping from new speakers


I have a problem and need some advice. I just purchase a new system from Audiogon members that now consists of new Opera Quinta speakers, a used Musical Fidelity 3.2 Int. Amp and MF 3.2 CD player. Also purchased Purist Audio Vesta speaker cable, Silver Audio interconect and a Zu Cable power cord. I have listens to the new system and it sounds good EXCEPT when I turn it up to about 45% power or about 11:30 on the volume knob. That is when the speakers will start distorting and making a popping noise, I just turn it down below 11:00 on the volume knob and it sounds good again. This is not normal is it? I have tried different CD players, interconnercts and music but that doesn't change things. What should I try next?
davef

Showing 6 responses by davef

Yes it is very loud and I would not listen to it for more than about one song at that volume. When I first noticed it was when a friend come over and we listen to the intro to Hotel California. the "bass" and Acoustic Guitar into. didn't cause the problem it was after they started to play the song. So then it might be normal for a system to only play distortion free up to about 40% of full volume?
I could definitely live with it this way but it seems to me that something is wrong. I will contact Musical Fidelity about the possibility of a bad transistor. Thanks for the input guys. Any other ideas would be appreciated.
Talked to the musical fidelity distributor and he said that turning the volume up 50% is full power for an amp ??? He didn’t think there was any problem with my Amp.
I also checked and my speakers are 4 ohms with Sensitivity 90 dB Recommended amplifier power: 30-180 watts Nominal impedance: 4 Ohms and my amp has Power 115 Watts per channel into 8 Ohms (20.5dBW) 185 Watts per channel into 4 Ohms.
I’m not sure what to think but I don’t have any other ideas except I shouldn’t turn it up to loud.
Thank you Plato for you research and analysis.

I will enjoy my new system and it does sound great to me.