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RE: Harsh vocals in Magnepan 3.7i

The many people who switched to higher power amps after going to a bigger maggie and reported a great improvement is just too large to leave the assumption of equal power needs even as similar SPL levels. It could be that the back EMF is the key change when going to a larger model such that more power/damping capacity is needed. But the power/size relationship remains too common an observation not to have a direct physical explanation and be readily measurable.

From my own experiences it is obvious that the Halo Int is not even remotely close to sufficient for a large maggie. Perhaps marginal for a 3.7. Enough if the music isn't large scale and isn't played loud. But well recorded Jazz often has huge dynamic range, and in my initial OEM TIV setup was tipping over the Bryston 4B NRB both when driving the whole speaker and in biamp driving the bass along with a PSE Studio 4 on top, which was also driven into distress. In fact, the harshness of the clipping Bryston on the complete TIV made me regard it as a joke so far as its' being a powerful amp.

Part of it could be that the ribbon tweeter simply reveals amp distortion far better than the QR tweeter. Since you can readily hear A/AB amps coming out of class A operation with a ribbon maggie, whereas the transition is not that easily perceived with a 1.7 or a good competing box speaker.


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