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In Reply to: RE: Too Bad! posted by neolith on October 29, 2015 at 19:09:44
From 15khz UP I'd suspect no GREATER than 10% of total power. I doubt, or rather HOPE the Bryston doesn't have problems like that.
Maggies are NOT a 'bad load'. Low sensitivity? Check? High reactance? Nope.
Me? I'd look at power line stiffness. My 'd' amps didn't have such problems with roughlly the same 4ohm power as a 4bsst2. But the 'd' amp at those outputs were over 70% efficient, and possibly 80% from plug to speaker. The Bryston? 50%, give or take.
Too much is never enough
Follow Ups:
I agree but it's hard to argue with reality and I was looking for a possible cause of the clipping.
FWIW W4S states that their SX mono series is stable into 2 ohms - no mention about the ST but they use the same modules. I don't think they want you running continuously at 2 ohms but for transients it may explain why I have never had clipping with the ST500 (I did have occasional clipping with a Bryston 4BST that preceded the W4S).
A quick look at the specs on the 4BSST2 shows 300 into 8 but 500 into 4 which suggests a 2.5 ohm load may be just a little too much under the "right" conditions.
Edits: 10/29/15 10/30/15
Can confirm 4B NRB clipping on nearly everything beyond a chanteuse-ey with a guitar. Driving the bass panels.
Of course I play at front of the hall volumes and living room chamber music volumes.
Not everyone does that nor wants it.
The Bryston was always on the hot side after a while playing. Tried it as a tweeter amp but it ran very hot on the 2.74 ohm tweeter. Does not do high current very well. Definitely does not like loads under 4 ohms.
A simple test and maybe a cure is to put in a 0.5 to 1 ohm resistor in the tweeter attenuator.
Edits: 10/30/15
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