You will get some sound from the speaker no matter what direction it left the speaker from. Off-axis response into different directions matters a LOT - my usual (maybe too often expressed here) suggestion is to just put a large board (or maybe a 33rmp record cover) between your ears and a speaker, and notice how little - hardly at all - the volume you hear is reduced.
All places you might put the mic might not be equally relevant, but the one place designers or manufacturers choose to put the mic is certainly not the only one that matters. And everywhere you put the microphone you're going to get a different frequency response curve.
An amplifier has just one pair of speaker terminals, and you measure its frequency response from its one input pair of input nodes to its one pair of output nodes.īut a speaker has an infinite number of output points - everywhere in 3D space out in front of it. Loudspeakers don't have " a" frequency response like, say, an amplifier does. There's another fly in the ointment, and a very large one. I see many loudspeakers that accept 5, 6 even 7 dB "window", so am I pushing it to far with my 2.5 dB variation ? I guess the reason for asking is that as you "compress" the freq.respons, the C, R and L values go up which is equal to higher cost. So this is a manufacture response and the question is as follow: What do you accept as a dB response change over the useful frequency response ? At most, +/- 3 dB variation between 76 Hz to 25 kHz. The picture show a filter which maintain a +/- 2.5 dB response between 77 Hz and 8 kHz. Some quick facts:ĭrivers 3/4 Dome Tweeter, 5.25" Midrange, 2x 6.5" Woofers. I have attached a picture of the synthetic crossover network I've been working on. And it is the flat frequency response concept that I want to ask about.
#Tefview x over speaker will not go away drivers
Unlike amplifiers which can measure flat from perhaps 5 Hz to 100 kHz or more, speaker drivers do not. Except drivers who measure extremely flat, all drivers have peaks and valleys over the range of its accepted frequency range.
And since loudspeakers to a large degree is open to interpretation, lets bypass what we personally like and look at an actual objective topic.Īs a general rule, it is said that a loudspeaker should have a ruler flat frequency response. We also have psycho-acoustics which perhaps play a larger role on what we enjoy, aka what sound good or not. There is one thing that stand out: Everyone is creating an interpretation - Beyond very few objective measurements like Equal Loudness, exactly how we interpret sound entering our ear is largely uncharted. I have learned about the crossover and its function and there are many school of thoughts regarding speaker filtering, how much and how little it should correct.
#Tefview x over speaker will not go away driver
I've read books and articles about loudspeakers, drivers and crossover and I have listened to perhaps all types of loudspeakers (dynamic, horn etc) as well as driver technology: different cone materials and so forth.
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