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#1
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what does these specs means?
1) nominal power handling at crossover at 2200hz = 220w/12db , 120w/6db
2) transient power 10ms = 1000w 3) frequency response = 1600hz - 22000hz 4) sensitivity( 2.38V/1m) = 91.5db what does the above specs means? these are the specs for a 8ohm tweeter, are they good or overkill or unsuitable for car audio? thanks in advance |
#2
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ANSWERS INLINE
"AntiSpammer" wrote in message ... 1) nominal power handling at crossover at 2200hz = 220w/12db , 120w/6db The 2200hz is the frequency at which the test was run. I have never seen wattage ratings right next to decibel numbers. Perhaps the db numbers are the crossover slope settings and the wattage ratings are the power handling ability for the item if the crossover is set to those slope settings. That's just a guess though. I really have no idea what those ratings mean without reading it all and putting it in context. 2) transient power 10ms = 1000w You got me. 3) frequency response = 1600hz - 22000hz This is the sound frequency that the speaker will output. The range of human hearing is 20hz to 20,000hz (with good hearing). Hearing loss will generally decrease that range to something more like 25hz to 16,000 or 18,000 hz. If your tweeter is capable of a response such as you listed, it should be fine. It extends above the range of human hearing so you will hear all the high notes in your music and will only go down to 1600hz which is the midrange of music. You'll need a woofer or other speaker to cover the range from 1600hz down to 20hz (or as close as you can get to 20). HOWEVER, those numbers really mean absolutely nothing without knowing how the ratings were obtained. Were they rated with a variance of +- 5db, or +-10db, or higher? the higher the variance, the crappier the speaker will sound because certain frequencies will vary widely from others causing your ears not to hear everything evenly. 4) sensitivity( 2.38V/1m) = 91.5db Any speaker with a sensitivity rating of 90db or higher is fine. what does the above specs means? these are the specs for a 8ohm tweeter, are they good or overkill or unsuitable for car audio? thanks in advance |
#3
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1) nominal power handling at crossover at 2200hz = 220w/12db , 120w/6db
The 2200hz is the frequency at which the test was run. I have never seen wattage ratings right next to decibel numbers. Perhaps the db numbers are the crossover slope settings and the wattage ratings are the power handling ability for the item if the crossover is set to those slope settings. That's just a guess though. I really have no idea what those ratings mean without reading it all and putting it in context. Yeah, your guess is correct. Those are the xover parameters at which the test was run. In other words, they're not giving us a whole lot of info. I hate when manufacturers quote "system" power ratings for tweeters, instead of the actual power ratings for the tweeters. 2) transient power 10ms = 1000w You got me. It's how much power the tweeters can handle at 10ms intervals. To blow a speaker, you have to have enough power for a long enough time. Two components to it there. If you lower one component, you can increase the other (to a point). 3) frequency response = 1600hz - 22000hz This is the sound frequency that the speaker will output. The range of human hearing is 20hz to 20,000hz (with good hearing). Hearing loss will generally decrease that range to something more like 25hz to 16,000 or 18,000 hz. Or even lower, actually. Most folks with normal hearing can't hear very well about 17kHz or so. It takes a lot of power at frequencies above that to be audible. People with even mild hearing loss may have thresholds closer to 5kHz or so. Few can actually hear up to 20kHz without having to crank up the signal. Interestingly, I seem to recall that women tend to have higher thresholds than men... If your tweeter is capable of a response such as you listed, it should be fine. It extends above the range of human hearing so you will hear all the high notes in your music and will only go down to 1600hz which is the midrange of music. You'll need a woofer or other speaker to cover the range from 1600hz down to 20hz (or as close as you can get to 20). HOWEVER, those numbers really mean absolutely nothing without knowing how the ratings were obtained. Were they rated with a variance of +- 5db, or +-10db, or higher? the higher the variance, the crappier the speaker will sound because certain frequencies will vary widely from others causing your ears not to hear everything evenly. Exactly. Without knowing where they were setting the threshold, it's impossible to make sense of those numbers. Typically, there's a gradual rolloff of the freq response up in the early teens (kHz), so if they made the measurement at, say, +/- 0.5 dB, their rating may read 18kHz, whereas a threashold at +/- 1 dB could make a 22kHz threshold. 4) sensitivity( 2.38V/1m) = 91.5db Any speaker with a sensitivity rating of 90db or higher is fine. Even here they're leaving out important information, such as the type of signal they were using to obtain the rating. For instance, were they using a 1kHz sine wave, or were they using white noise? Overall, I'd say we don't have enough information to be able to predict the performance of this tweeter. I'd say that it's worth a shot. It might be useful to know what kind of tweeters we're talking about here... |
#4
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wow, thanks, thats fast.
but then is it easy to find a midbass/midrange that covers from 1600hz downwards? I have already bought the tweeters and there dont seems to be much of a choice. PS: sorry jeff, i clicked too fast and send an email to you... |
#5
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thanks again MZ, jeff.this is the tweeter.
http://www.morel.co.il/drivers/tweet...upreme130.html Overall Dimensions OD130mm (5.12") x 50mm (2") Nominal Power Handling Crossover at 2,200 Hz P 220 W/12dB 120W/6dB Transient Power 10ms 1000 W Nominal Impedance Z 8 Ohms Sensitivity (2.38V/ 1M) 91.5 dB Frequency Response 1600 - 22,000Hz Resonant Frequency FS 680Hz 10%+/- Voice Coil Diameter OD 28mm (1.1/8") Voice Coil Height 2.7mm (0.106") Voice Coil Former Aluminum Voice Coil Wire Hexatech Aluminum Number of Layers 2 DC Resistance RE 5.2 Ohms Voice Coil Inductance @ 1khz LBM 0.09 mH Magnet System Type Neodymium flat pancake design Magnetic Gap Height HE 4.2 mm (0.16") Cone / Dome Material Acuflex? Coated soft Dome Net Weight Kg. 0.52 Kg. Overall, I'd say we don't have enough information to be able to predict the performance of this tweeter. I'd say that it's worth a shot. It might be useful to know what kind of tweeters we're talking about here... |
#6
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wow, thanks, thats fast.
but then is it easy to find a midbass/midrange that covers from 1600hz downwards? I have already bought the tweeters and there dont seems to be much of a choice. You should be able to find midrange speakers that can get that high. In fact, most of them can... |
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