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Post by Talley on Jan 2, 2018 21:37:14 GMT -5
too many times in my own thread the tech goes over my head....
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Post by leonski on Jan 2, 2018 22:12:01 GMT -5
Get an impedance minima of 3 ohms or perhaps a little less WITH a phase angle of over 50 degrees, and you'll start seeing differences between amps. In my humble opinion, this is an example of a speaker that was poorly designed. I'd ask why someone would want such a poorly designed speaker to begin with?  You should write the guys at Thiel and B&W a letter. I'm sure they'd be glad to know some of their speakers were 'poorly designed'. And don't forget an early Apogee speaker. Notorious amp killing 1 ohms impedance in spots. Start looking at Stereophile Measured data for speaker tests and stuff like I mention isn't all THAT unusual. I just want to add one thing from Stereophile. This is about the 5th or 6th speaker down in their listing of 'floorstanding loudspeaker reviews'. This is also an Eye Popping 100,000$ worth of Wilson. Check out the measured data for impedance and phase data. I will be First in line to admit that 1. This is NOT a cheap speaker. 2. The purchaser can presumably afford nearly ANY amp on the planet. But also must consider that for the price, they could have made a bunch of different decisions and maybe got a more 'amp friendly' speaker. 3. Given the intended price point, I doubt the designers had much incentive to speak with any mere amplifier designer. www.stereophile.com/content/wilson-audio-specialties-alexx-loudspeaker-measurementsAbove this in the listings is a KEF speaker which is an EASY load, and far more modestly priced. Very flat impedance and modest phase angles. Most amps with reasonable power should do well with the KEF. |
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Post by mgbpuff on Jan 2, 2018 22:14:26 GMT -5
too many times in my own thread the tech goes over my head.... That's O.K. you have a hands on understanding being an electrician that I should not dismiss lightly because I tend to look for the theoretical explanation and as a result fail to give credence that, in reality capacitors, inductors, and resistors as well as active components are not as perfect as the math models assume. |
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Post by pknaz on Jan 3, 2018 1:15:00 GMT -5
In my humble opinion, this is an example of a speaker that was poorly designed. I'd ask why someone would want such a poorly designed speaker to begin with? You should write the guys at Thiel and B&W a letter. I'm sure they'd be glad to know some of their speakers were 'poorly designed'. And don't forget an early Apogee speaker. Notorious amp killing 1 ohms impedance in spots. Start looking at Stereophile Measured data for speaker tests and stuff like I mention isn't all THAT unusual. I just want to add one thing from Stereophile. This is about the 5th or 6th speaker down in their listing of 'floorstanding loudspeaker reviews'. This is also an Eye Popping 100,000$ worth of Wilson. Check out the measured data for impedance and phase data. I will be First in line to admit that 1. This is NOT a cheap speaker. 2. The purchaser can presumably afford nearly ANY amp on the planet. But also must consider that for the price, they could have made a bunch of different decisions and maybe got a more 'amp friendly' speaker. 3. Given the intended price point, I doubt the designers had much incentive to speak with any mere amplifier designer. www.stereophile.com/content/wilson-audio-specialties-alexx-loudspeaker-measurementsAbove this in the listings is a KEF speaker which is an EASY load, and far more modestly priced. Very flat impedance and modest phase angles. Most amps with reasonable power should do well with the KEF. Price and pay-to-review sites, a good speaker does not make  I've heard Wilson Audio in a professionally installed room, professionally treated (by the premier local high end integrator) and I wasn't impressed. Designing something with an impedance dip at 1 ohm or a steep phase angle (either would purely be a result of the crossover design) remains, IMHO, a bad design. |
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Post by leonski on Jan 3, 2018 1:36:43 GMT -5
I heard 100 large+ of FOCAL in a hotel room and was also not too impressed. The speaker cable TO the speakers weighed about 5lb per foot.
I'm not referring to the Sound of the speaker which is very subjective, but rather the measured performance which should be repeatable within a margin of error, by any competent tech....
I will be the first to say that amp designers and speaker designers seldom speak. Or maybe speak the same language. And yes, WHY do some speakers end up measuring so wacky?
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Post by AudioHTIT on Jan 3, 2018 9:30:01 GMT -5
too many times in my own thread the tech goes over my head.... Nothing wrong with that, one of the reasons we start, read, and post in threads is to learn. |
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