Maybe a silly question, but I wonder if it would be of any interest (or value) to re-run the the Klippel tests after you've applied EQ?
Yeh, I threw every tweak at it that I could.On the brighter side, amir seems to have fixed the klippel isaue with multiple bass drivers and multiple ports.
It is not easy to replicate the EQ that way.Maybe a silly question, but I wonder if it would be of any interest (or value) to re-run the the Klippel tests after you've applied EQ?
When things go wrong, a sample size of of One makes it hard to figure out what’s going on.
In my experience I've replaced many woofers that cause shorting but it could be the crossover. I've never had a bad crossover that was not fried and smoky. But stuff happens for sure. I serviced Energy and KEF for some years in warranty and handled a lot of blown, baked and mechanically broken speakers.Regarding the amp that goes into protection, could it be a capacitor from the crossover that starts leaking when voltage goes up?
Conclusions
The Infinity Reference 253 is one hell of a package. You couldn't build one quarter of it for what they are selling it for right now. If it performed to Harman spin data, it would have been a killer, giving you "almost Revel sound" but at far lower cost. This was not meant to be though with that sharply rising highs. Distortion is livable for sure but definitely not Revel like there. Finally, sending my amplifier into protection -- while needing more investigation -- does not make for a good experience for this reviewer.
As is, I can't recommend the Infinity R253. Company needs to provide an answer why retail units are not matching their measurements. Or show where my measurements are wrong. On the other hand, if you can EQ these, then you could have a very nice speaker that provides very good performance.
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Well I think you need to put this into context. *ALL* electronic products have a potential for and will have failures. There appears an issue here. Whether its an uncontrolled design/component change or failure I would hope that the level of HF deviation would be readily noticeable to anyone getting hold of a pair.Whether it's broken by design or not is irrelevant. The point of Amir's testing is to expose the performance of a product - and he's done just that. Given that none of us have access to the kind of testing equipment that he does, we are reliant on products matching their claims. Or perhaps you wouldn't mind taking a chance on a pair of these? Maybe you'll get a pair that sounds nice, maybe you'll get a pair that puts an insanely powerful amplifier into shutdown.
My guess is the impedance sweep is at a low voltage.But if there's definitely a problem in the crossover, why does the impedance measurement look normal (and consistent with the impedance for the R263)?