Understanding Speaker Measurements

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Audio Science Review

Audio Science Review

Күн бұрын

Learn how speaker measurements can predict how good a speaker sounds and what terms like directivity, beam width, distortion, and frequency response mean.
Text discussion: www.audioscien...

Пікірлер: 205
@JesusMartinez-mk6fc
@JesusMartinez-mk6fc Жыл бұрын
A masterclass on speaker measurements Amir. Kudos! The knowledge just flows out so naturally from your mouth that it shows how well you understand the subject. Thank you for sharing that knowledge and passion.
@KevinLaffey
@KevinLaffey Жыл бұрын
Totally agree. Unscripted, unedited, masterclass indeed. I was looking forward to this video and it didn't disappoint. Thanks Amir.
@basberends332
@basberends332 Жыл бұрын
Great tutorial! Very important. Difficult to measure, glad you do that for the community. Even more difficult to implement at home 😬
@quaternion
@quaternion Жыл бұрын
Tanks for this video Amir. Please make more videos. More videos can mean more participation... Can mean more views and could mean the possibility of monetizing the channel. ASR could benefit from this. ASR and the work you do is (IMHO) to important to go away. 😉
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Thank you for the encouragement. Much appreciated. :) On monetization, I qualified long time ago and have chosen to not to do that. It allows people to watch the content without interruptions.
@Gabriel-of-YouTube
@Gabriel-of-YouTube Жыл бұрын
So many ear based audiophiles will hate this...
@junior-OG
@junior-OG Жыл бұрын
😂😂
@rikardekvall3433
@rikardekvall3433 Жыл бұрын
Amir did do a great explanation how it works. I rather be an ear based, then a measurement based audiophile. I’m here for the music.
@johnlonky8591
@johnlonky8591 Жыл бұрын
For Amir, only box type speaker exsist in the world. Some of this terory dont apply to panel, diople, open bafle speakers , etc… After trying mangneplanars, I will never go back to box speaker. They all sound “boxy” to me, no matter how well they measure.
@DaveJ6515
@DaveJ6515 Жыл бұрын
Why hate? We already have too much hate on this planet. Suffice to say that although I am a mathematician, reading numbers never moves me to tears. Listening to my hifi often does. That’s how I measure my stereo: emotions. But if you prefer measurements, be my guest!
@Jason-fp7vi
@Jason-fp7vi Жыл бұрын
I don't think anyone hates ear based audiophiles. It's more so a matter that some people are spending much more money than they need to get the same objective experience. You take the blue solid silver amp power cable, you wake up and spend whatever money you want. Take the red lamp cord speaker cable and see how cheap your ear holes go
@LeoMakes
@LeoMakes Жыл бұрын
Thank you very much for making this video! I'm no stranger to this info (I work in the industry) but watching this filled in quite a few gaps in my knowledge. I hope you'll make more. Also: I now know why my Genelec 8331s sound so damn good no matter where I place them.
@Projacked1
@Projacked1 Жыл бұрын
Wow, this was everything a person could want to learn from speaker measurements. I see myself that omnidirectionality is usually explained incorrectly. We learn everyday ! This is excellent Amir, thank you! 👌🤓
@zyghom
@zyghom Жыл бұрын
no, Amir said: 5 years! so that was only scratching the surface man! ;-)
@kenhiett5266
@kenhiett5266 Жыл бұрын
This is excellent information, Amir. Especially your explanation of the sound dispersion related to matching the drivers. Thank you. One minor disagreement is my experience with ports in the front vs. back. If a speaker is designed properly the port being in the front can be a significant advantage when the speakers are backed up close to a wall.
@willbrink
@willbrink 3 ай бұрын
Very useful info as always.
@AVCONSULTTX
@AVCONSULTTX Жыл бұрын
Very thorough explanation of direct vs early, vs effective power "in room" response in a room. Excellent discussion of the challenges getting test gear to reveal real aberrations of the speaker, vs mic location(s), or room contribution. I envy your test platform!
@kyron42
@kyron42 Жыл бұрын
Not a bad video for explaining the basics. In your next video it would be interesting if you explained how multiple subwoofers can be used to fix room modes.
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Good idea for a future video.....
@dingdong2103
@dingdong2103 Жыл бұрын
Dr. Earl Geddes made his Phd on the subject, useful read for sure... His speeches can be found on KZbin too.
@kyron42
@kyron42 Жыл бұрын
@@dingdong2103 thanks
@jonthompson8807
@jonthompson8807 Жыл бұрын
damn it amir! im supposed to do homework its the last week of class 🤪
@JBoulter11
@JBoulter11 Жыл бұрын
This was so informative, thank you! Would love to see matching videos for headphones, as well as amplifiers and DACs!
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Thanks. I have done one for DACs: kzbin.info/www/bejne/ramlemlqjLapm8U The rest will be coming. :)
@Pierre-Leloup
@Pierre-Leloup Жыл бұрын
Thank you for this demonstration, in particular on the interest of well controlling the dispersion pattern of each driver under different listening angles, I learned some things important for my future 4-way DIY speaker project ! My listening room is not very big but it opens on both sides to other rooms, which lengthens the path of the reflected waves. I use a professional DSP based on the SHARC ADSP21489 (not a MiniDSP) 4 inputs and 8 outputs on XLR on my Magnepan 1.7i active, Purifi amplification and Viawave supertweeters to make up for the lack of air.
@dihydrotestosterone
@dihydrotestosterone Жыл бұрын
Welcome back 🙏
@antoniomarsicola8608
@antoniomarsicola8608 Жыл бұрын
Masterpiece as usual ! My proposal for your next video is to explain the Olive's preference score
@TheLkdude
@TheLkdude Жыл бұрын
@Amir , Thanks for sharing this valuable knowledge and for the amazing video. Please do the follow-up video as well, do Polar plots compliment the horizontal beamwidth?
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Thanks and will do.
@34332
@34332 Жыл бұрын
The waterfall explanation, and actual worth of it, was a great eye-opener as many reviewers use this as some sort of bible. Again a very meaningful, understandable and entertaining course with a touch of humor. Appreciated!
@sonicsaviouryouwillnotgetm6678
@sonicsaviouryouwillnotgetm6678 Жыл бұрын
I knew all this already because I actually have read Tool's book but I still immensely enjoy listening to Amir explaining this stuff as comprehensively as he does.
@swenic
@swenic 3 ай бұрын
What book is that?
@americanidle1277
@americanidle1277 Ай бұрын
​@@swenic Sound Reproduction is the name
@swenic
@swenic Ай бұрын
@@americanidle1277 ty
@mabehall7667
@mabehall7667 Жыл бұрын
FANTASTIC!!!!! Thank you very much! Best audiophile video and most informative audiophile video I’ve ever seen.
@Sharur1
@Sharur1 Жыл бұрын
Nice video, although I do think it would have been worth discussing subwoofers and crossing them over with main speakers to get 20 Hz and below extension.
@sree2z
@sree2z 14 күн бұрын
Phenomenal knowledge on speaker measurements and explained the concepts thoroughly. God bless you and your family.
@tomasstolpe8177
@tomasstolpe8177 Жыл бұрын
I have Genelec 8341 x2 with a 7370 sub, very happy with my setup
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Genelec makes some of the most perfect speakers around. Their only weakness is when they run out of power in bass which you have remedied with the sub.
@IsmaelMartinezPR
@IsmaelMartinezPR Жыл бұрын
Hello Amir: Thanks for the content. I truly appreciate it. Cheers
@brikaf6001
@brikaf6001 Жыл бұрын
Thank you for another MasterClass
@AsAgral
@AsAgral Жыл бұрын
Thank you so much for making the world of audio equipment better :)
@XX-121
@XX-121 Жыл бұрын
M-Audio BX8 the best monitor you can get for the money. the output from them is amazing. i got mine in 2008 (BX8a) and had 2 friends go out and get a pair behind me. i had another friend looking for some monitors a while back and the bx8's were hard to find because of the pandemic and ended up going with some Rockit's and they can't even compare
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Yes, it is quite a find. In Europe it is going for as little as 105 Euros each!
@carlsitler9071
@carlsitler9071 Жыл бұрын
I love my BX5s. Use them at work. At home I have quad 15" woofers bi-amped with Danish MTMs.
@ontherun8
@ontherun8 7 ай бұрын
As I've not much time to watch the full video, at least now, I'm wondering and asking you if Amir has ever made some measurement about FMD and/or AMD (frequency/amplitude modulation distorsion), in particular on coaxial based speakers. Thanks for let me know.
@sebastianrosenbach7873
@sebastianrosenbach7873 8 ай бұрын
34:13 Yes, but an EQ will change the time response at that frequency, so you do have a drawback aswell! (DSP based Monitors like Neumanns do correct for that though if using MA1 for example)
@rm-mastering
@rm-mastering Жыл бұрын
Great video, depth and concise. Thank you very much indeed
@swenic
@swenic 3 ай бұрын
Thank you, Would measuring a bipolar speaker (Paradigm bp for example) be very different?
@mp88mp88mp88mp88
@mp88mp88mp88mp88 Жыл бұрын
Excellent, a must for anyone who reads the speaker reviews on ASR, makes the review all the more informative. Another video with a different speaker would be great. Out of interest has there ever been a speaker that you tested on the NFS with eq that you have applied after the 1st testing? If would be very cool if a relavtively cheap speaker could measure as good as one say 5-10X more expenisve after simple eq.
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Thanks for the kind words. My measurement setup is not conducive to applying EQ. It can be done but is somewhat a pain. The results though would most definitely be as one would predict. The EQ would be reflected in the frequency response measurements. But sure, I should do one so I can point this as being a fact. :)
@MrIceman
@MrIceman 29 күн бұрын
Waiting video: "Understanding Headphones Measurements"...
@YuengsNwings
@YuengsNwings Жыл бұрын
I took a leap of faith and blind bought some used Revel 106’s at a great price to replace my B&W CM5’s. The B&W measure to have that happy FR showroom sound (measured by Stereophile, and confirmed by Dirac Live to behave as such in my listening space) that wowed me when I bought them from Best But Magnolia 12 years ago. The research on preferences did not lie to my ears, and I do very much prefer the neutral and well-behaving speaker. It sounds great at all volumes and with all genres of music, which I couldn’t say the same about the B&W. Thanks so much for the video.
@Untilitpases
@Untilitpases Жыл бұрын
You know someone knows by the clarity of thought (mentally seeing clearly the concepts) and holistic grasp of the subject. Roads traveled which aren't worth taking, etc. This was f Beautiful! You tied scattered concepts (for me) into a coherent picture. Thank you for not being stingy Amir!
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Oh, you are very kind! Put a big smile on my face.
@flex-cx9bi
@flex-cx9bi 10 ай бұрын
You state that a frequency response should be ruler flat in an anechoic room to be neutral. That is not correct. You need to learn the basics for developing loudspeakers before making statements like that. Read about full space and half space radiation pattern and how to compensate for that with a baffle step correction. Then you understand that the frequency response in an anechoic chamber needs to have a certain form depending on baffle width. The Near-Field -Scanner is not good enough for measuring loudspeakers. The developer have questionable knowledge about how a near field measurement should be performed. Near-field measurement should be made at a distance that is no longer away that the diameter of the driver measured to be able to give a accurate measurement. At 40 min in there is a far field simulation with a sloping frequency response. If you make that curve flat above 1 kHz you would have a very nice target curve for a near field measurement. -3dB at 40-50Hz and with a -12dB/octave decreasing bass amplitude down to 20 Hz you will have a speaker that have a very good chance to have a really flat response in your room. 100-1000 Hz should be sloping with approx. 4dB in a near field measurement to compensate for the half space to full space radiation pattern transition. Below 100 Hz the room will start to make the radiation pattern go from full space to half space and at low frequency 1/4 space radiation. So a fairly good taget would be -3dB at 45 Hz sloping to -17dB at 20 Hz. Use that curve as taget curve for a nearfield measurement and you will have a pretty good and straight frequency response with a far field measurement and at your listening position. Your near-field target curve is flat and then you say that it will be sloping in the far field simulation. The reverse is correct, so you are absolutely incorrect with that assumption. You can not measure higher frequency from a distance and get accurate results. Tweeter need to be measured within distance of the baffle width to be accurate enough, and the closer the better. Any distance longer than 1/2 baffle width will be plauged by cabinet edge diffraction and pretty much useless for evaluating what's really happening with the sound character.
@klaushaunstrupchristensen7252
@klaushaunstrupchristensen7252 Жыл бұрын
Wonderful to hear some sanity in an audio world full of snake oil and worse. However I will have to respectfully disagree with your statement around 15 minutes into the presentation. A general narrowing of dispersion is not “okay” in my world. As you say reflections of the walls should ideally be a mirror of the direct sound. If we look at fine speakers with waveguides like the Revel Salon 2 then the response is beautifully flat on axis but down roughly 5 dB at 2 kHz and 10 kHz at an angle of 75 degrees of axis. Measurements taken by NRC for soundstage magazine. Beautiful compared to most speakers but not close to the ideal of absolutely even dispersion at all frequencies. In a world of less ideal speakers it’s probably going to work, because the studio monitors used for the most recordings are suffering from exactly the same problem. I find it instructive that a company like MBL who makes speakers with almost the same frequency response throughout a 360 degree rotation of the speakers (with low diffraction as well, because of their driver design) finds it necessary to elevate the bass response below 250 Hz by several dB. In a way it’s sad that a somewhat flawed concept has become an industry standard so when someone comes up with an improvement (dispersion of an omnidirectional speaker)then they have to introduce a flaw (a lifted bass response) to give it the general in room spectral balance of speakers with dispersion issues. Keep up the good work! Greetings from Denmark
@Nightjar726
@Nightjar726 9 ай бұрын
For dispersion which is not researched so much, is it better to have a even dispersion let’s say from 1000hz to 10000hz or a slight gradual narrowing of the dispersion ? I’ve seen the Perlisten S7t which has a very wide dispersion but narrows quite immediately around 4000hz which I assume is where it’s woofer hands off to its tweeter array. That’s my first question. Second question. Many say that super wide dispersion has a wider soundstage of course but has diffuse imaging. Is there a good sweet spot to have a nice wide soundstage but good imaging as well? Such as a 70deg even dispersion is a good sweet spot? Or would that be considered very wide dispersion? I wish there was more research on dispersion. Thanks so much!
@EM-ke8is
@EM-ke8is Жыл бұрын
Excellent job making a clear tutorial from A to B , I was able to follow along and grasp as well as you explained what the waterfall graph actually measures as for some reason, I was unable to quite get in the past lol .
@anfernyjackson9013
@anfernyjackson9013 Жыл бұрын
Sorry if I missed it, but which measurement gives an indication of spatial qualities (soundstage width/depth)? I've heard some reviews say higher frequencies (but not mention which or how), for speakers some people say the directivity.
@peteleoni9665
@peteleoni9665 Жыл бұрын
Hi this is Poolio from Belgium. You are a hero of mine. However I am having trouble getting people to believe my scatological audio information. I even start out by saying I am from some exotic location, and even throw in something obscure about the weather to lend credibility. Sadly they still don't believe my serpentine essence. What am I doing wrong? Am I too tranparent?
@hoobsgroove
@hoobsgroove Жыл бұрын
You going about the 2K 3K but what about the BBC dip where they say it's better to have these frequencies at a lower DB for more natural sounding speaker You're not particularly agreeing with that scenario why!? Yeah and I didn't add the other frequencies because we're not talking about that
@klaus-udokloppstedt6257
@klaus-udokloppstedt6257 Жыл бұрын
so, wouldn't it be better to make/use even smaller tweeters so they stay in the omnidirectional behavior over their frequency range (like the woofer), and probably use multiple of them to produce the same sound energy? because w/o all the on beam vs off beam side effects, the entire can of worms regarding reflections and resonances, effecting the frequency range plot by creating ripples and distortions, wouldn't be there.
@bingdong8571
@bingdong8571 Жыл бұрын
Cool, never watched this channel before, just heard the hate. Lots of really good info! There was some graph in there that you said we used to use but it turns out it was wrong. If you and your gripers can really understand that statement then there should be no problem with all of you i think. Anyway, good stuff.
@glenncurry3041
@glenncurry3041 Жыл бұрын
You mentioned that strange resonant dip/peak in the 500-600Hz range. But did not mention that it seems to appear at reduced levels at it's harmonics, a dip about 1.2kHz and a dip and peak around 2.4Khz.
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Good catch. I had not noticed it!
@glenncurry3041
@glenncurry3041 Жыл бұрын
@@AudioScienceReview Even seems to be a very low level subharmonic of it? Trying to imagine what would cause that narrow of a Q peak/ dip.
@Azzy_Mazzy
@Azzy_Mazzy 5 ай бұрын
is there a way to calculate the in-room response with a weaker celling reflection? and please make a video about room acoustics.
@Ronnymikkonen2686
@Ronnymikkonen2686 7 ай бұрын
Music is fun with good equipment, then there is all kinds of stuff around. Most of it can be fun? For a while?
@skip1835
@skip1835 Жыл бұрын
In every single way - an excellent presentation - to call it educational would be putting it mildly - thank you Amir.
@pedrocols
@pedrocols Жыл бұрын
I don't understand there are many many many many speakers out there that measure poorly and the get rave reviews.....In my experience speakers they all sound different in every room.
@Sukimaye
@Sukimaye Жыл бұрын
Thank you so much. This is the video I was looking for. Very informative.
@GentielioGaming
@GentielioGaming Жыл бұрын
I guess it has been asked to you before that some speakers sound good with good measurements and some bad with also good measurements. Has it to do with the acoustics in the room they listen or is it a design of good crossover parts vs bad crossover parts in the signal of the speaker? Do better parts in the speaker make a difference. If it is so many speakers even high end are not good even expensive ones if they not have the quality parts.
@rob21
@rob21 Жыл бұрын
I assume the Klippel people designed their algorithm with comparing to an anechoic chamber?
@Adam.NavyVet
@Adam.NavyVet Жыл бұрын
One thousand likes! Speaking about speakers the wait is Over…
@phpn99
@phpn99 Жыл бұрын
I'm writing this in the first 5 minutes of the video, so I don't know yet whether you'll address this later : Some of the most compelling and exhilarating experiences I've had listening to reproduced music, was done via dipole speakers. I have owned all kinds of high-end speakers, from very technically-accurate Genelecs to massive units from Wilson Audio. All of these speakers were enjoyable and impressive. But I've experienced things with dipoles that are just peerless. From large Magnepans to the absolutely stunning Linkwitz 521, I feel like there's something in dipoles we ought to talk about. The Linkwitz are very demanding to amplify, and the units I listened to used six Purify core mono amps to drive them with an external crossover. Not a setup for people who don't want to fiddle around, and to whom I'd recommend a good pair of active/integrated Gennies, KEF or similar. The sound of a properly set up Linkwitz in my experience beats the experience of a pair of Kii Threes. Have you had similar experiences ? Do you have a theory about this ? Are dipoles driving the whole room and by that token, making the sound seem more naturally occurring ?
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Dipoles due to their design, can cast a very spacious stage which can be quite captivating. With the right music that works so well and beyond what you can get with a standard speaker. The issue I have with them is that they bring the same signature to everything you play. I don't want my rock and pop music to sound that way. To the extent your taste in music matches their capabilities, then they are an excellent choice. Otherwise, I don't think they are a replacement for normal monopole speakers.
@johnsmith1474
@johnsmith1474 Жыл бұрын
Great for watching TV.
@KieronTaylor
@KieronTaylor Жыл бұрын
Very nice! I've never struggled to read the graphs, but the explanation of the physical causes of various deviations from ideal is the sort of thing that takes many years of experience to develop an intuition.
@chevalierdeloccident5949
@chevalierdeloccident5949 2 ай бұрын
I would imagine a port or passive radiator have less than ideal step responses.
@microfan9892
@microfan9892 11 ай бұрын
What is the reason for not measuring impedance vs frequense vs phase?
@HeyYall398
@HeyYall398 Жыл бұрын
Engaging with this resource provides a rich and enlightening learning experience, significantly outshining the often vague and subjective insights offered by a multitude of audiophiles. While thousands of audiophile opinions may swirl in a realm of subjectivity, often lacking empirical grounding, the knowledge acquired here is rooted in objective analysis and factual evidence. This stark contrast in learning value is palpable. Here, each piece of information is a stepping stone towards a deeper understanding of audio quality, offering a solid foundation for making informed decisions. On the other hand, navigating through the sea of subjective audiophile opinions can feel like wading through a quagmire of personal biases, often leading to a cul-de-sac of confusion rather than a pathway to clarity. The objective lens provided here cuts through the fog of subjectivity, offering a clear, well-lit path to genuine understanding and appreciation of audio excellence.
@Sinthora97
@Sinthora97 Жыл бұрын
Very interesting video. I just love the forum and the channel. One question: you said that the change in the way the drivers beam or widen the sound impact the off axis response. I get that. What i don't fully understand is why they are not equally important for the on axis response. Doesn't delivering more energy to the sides automatically mean less energy to the center? Is this just not a problem because you already assumed that the speaker measures flat on axis? Is it true then that i would have the same problems but reversed if i would tune a speaker off axis first to be flat off axis and then listened to it on axis? Another way to put this question: is the directivity problem aquestion of how a *fixed amount* of energy is spread out in space or is it a question about how much *additional* energy is put out to the sides. I assume it is the first. I am glad for anyone who knows something definitive.
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Thank you for kind words. On your question, yes, you could focus all the sound to a narrow angle. But then the moment you shifted left and right the sound would hugely drop off. In addition, side reflections provide spatial effects that are pleasing.
@pennpen
@pennpen 6 ай бұрын
I never thought I would watch it for an hour. So fascinating. At the same time, I have a better understanding of reading this chart. thanks.
@LucasSchlief-ts4ee
@LucasSchlief-ts4ee 11 ай бұрын
Thank you so much sir, you are so smart keep it up lol
@Fordtruck4sale
@Fordtruck4sale Жыл бұрын
Wait, Amir owns a Near Field Scanner too?
@kr-edit
@kr-edit 5 ай бұрын
Thank you very much for this video
@hartyewh1
@hartyewh1 Жыл бұрын
Great stuff. Glad to finally understand more than the panther's pose.
@Sinthora97
@Sinthora97 Жыл бұрын
I dont get why we measure off axis Response by measuring reflections. Why not just put the microphone to the side and measure the waves coming directly from the drivers?
@AudioScienceReview
@AudioScienceReview Жыл бұрын
That is actually the way it is done. I should have made it more clear. The measurement system computes the entire soundfield. And then takes radiations at the various angles and graphs them. The naming is just there to make sense out of why those angles are used (and some include an array of angles).
@flargosa
@flargosa Жыл бұрын
What is the difference in sound between a flat measuring $500 speaker vs a flat measuring $5k speaker?
@BoredErica
@BoredErica Жыл бұрын
Ability to play loudly and at deeper frequencies without a subwoofer.
@audfrknaveen2256
@audfrknaveen2256 Жыл бұрын
I learned many things from you and Erin's audio corner. Thanks a lot for all the great content Amir!!!
@francescodelia4069
@francescodelia4069 7 ай бұрын
It's a really, really excellent video!
@audioprotaro1338
@audioprotaro1338 4 ай бұрын
Most valuable video on speakers
@-303-
@-303- Жыл бұрын
I am so happy your video popped up on my feed. I learned SO MUCH.
@Mr_G
@Mr_G Жыл бұрын
Thank you for very detailed explanation, Follow up wideo would be very appreciated as well.
@Persia101
@Persia101 Жыл бұрын
Please do a review on Genelec 8020C
@paulmcdonough9595
@paulmcdonough9595 Жыл бұрын
Thank you Amir, for your very informative videos, I wish this had been about when I was looking for new speakers, it would have saved me a lot of travelling about aimlessly listening to different speakers at various dealer. Long may science prevail
@dillonsaudio
@dillonsaudio 3 ай бұрын
Amir's speaker measurements (more than a dozen and counting) have lined up with my listening impressions. Accurate results; and he is doing these measurements properly. Even using the best high-end amplifiers and source components will not correct a bad pair of speakers. Instead, top-notch gear will only spotlight the shortcomings.
@martingarrish4082
@martingarrish4082 Жыл бұрын
Good lecture. I have 2 questions: 1. Doesn't the waterfall plot prove that you cannot just EQ local peaks and troughs in a speaker frequency response? The resonant energy storage would still reduce transient response accuracy. So signal fidelity is reduced with any resonance, although it is useful for bass power handling. 2. Wouldn't a well designed full range driver use the cone flexural wave and waveguide flare to allow reasonable off axis dispersion? The problem is that bass drivers do not consider this approach. The full range challenge is meeting bandwith by minimising voice coil mass and maximising magnet BL for a given xmax.
@robertjones8856
@robertjones8856 Жыл бұрын
Hi Amir, I'm new to the channel and I love it. This is an incredible body of work, I'm learning so much. I have ATL PMC speakers, I wonder how they would measure 🤷..maybe we'll find out one day. Thankyou for all your hard work, I'm hooked 🎣. Best regards, Rob UK.
@paulhayes2917
@paulhayes2917 11 ай бұрын
Great video, very insightful - thank you for posting this. Explains why I didn't like the sound after I used the Audyssey calibration on my Denon receiver - it would seem that by flattening the in room response it undid the natural downward slope that I preferred.
@allanellis5827
@allanellis5827 Жыл бұрын
Fantastic video Amir. Thank you so much. You are providing an invaluable service to the hifi community. One question. Is it advantageous to purchase an equalizer? If so is there one you could recommend? Thanks again Amir.
@Thomas..Anderson
@Thomas..Anderson Жыл бұрын
0:20 Nothing determines the enjoyment and tonality and experience and Fidelity that you get out of your audio system more than speakers do. But what about all those people praising power cables, shakti stones and C37 lacquer? Surely they can't be wrong. ;) On a more serious note: I'm glad you mentioned the importance of constant directivity. 28:02 I don't think you have explained that part correctly.
@AudioScienceReview
@AudioScienceReview Жыл бұрын
:) What is incorrect at 28:00? Field separation uses the phase angle to compute what is incoming wave vs reflected one. Is this what you are referring to?
@Thomas..Anderson
@Thomas..Anderson Жыл бұрын
@@AudioScienceReview I think I should retract that part of my comment. I had vaguely in my mind some Klippel presentation or web interview and I remembered something that was in essence gated impulse response measurement. I have now looked up some papers and there is mention of gated impulse response but in a context how things were done before us (Klippel). Thank you for your response and sorry for wasting your time.
@edgar9651
@edgar9651 Жыл бұрын
Thanks Amir! Perfect timing. I just received my JBL708P which you highly recommended some time ago. After watching this video and looking at your measurements I understand your graphs much better. Thanks.
@NosEL34
@NosEL34 Жыл бұрын
In my opinion this is such great information. Finding a speaker with a good on and off axis response is so much easier to deal with when actually set up in home. Awesome video with lots of valuable information and great explanation of what's going on. Very cool 👍😎
@nekomancer350
@nekomancer350 Жыл бұрын
Thank you, that was very well explained. Do you ever take an RTA of the speakers in your listening position? I was interested in knowing what issues can and can't be fixed with regards to the room.
@strawbryminiwheats
@strawbryminiwheats 9 ай бұрын
very good, thank you.
@kumarsaride5054
@kumarsaride5054 11 ай бұрын
One word “Brilliant”
@davidcottrell1308
@davidcottrell1308 Жыл бұрын
Great job!!! DUDE!!!
@peanutbutterjellyjam2179
@peanutbutterjellyjam2179 Жыл бұрын
Always a pleasure to follow along as teach us, Professor Amir. (I don't know if you are a professor, but I consider you t be one.)
@martinmares8998
@martinmares8998 Ай бұрын
Great video! Everything is well explained. I know now what too look for in a speaker for my room. Thank you!
@thegroove2000
@thegroove2000 10 ай бұрын
You and Ethan Winer are the dynamic duo. Thanks for your expert no non-sense insights.
@eamon7840
@eamon7840 Жыл бұрын
What a really good tutorial and it does open up a whole set of other questions. Hopefully there are more explanations where these came from. Look forward to when they come along.
@migalito1955
@migalito1955 Жыл бұрын
Fabulous presentation.
@komhst
@komhst Жыл бұрын
Great educational video! Excellent presentation. Congratulations!!!
@kyron42
@kyron42 Жыл бұрын
I totally agree that the porch should be at the rear to minimise unwanted noise. You can experiment with having the port various distances from the wall. Having the port very close to the wall has a similar effect as having a longer port.
@kyron42
@kyron42 Жыл бұрын
If the speaker gets distorted playing sub bass then you need to chop out to sub bass. Either add a subwoofer or boost the midbass for balance and a bit of punch and slam
@teashea1
@teashea1 Жыл бұрын
You have brought a lot of truth to this area. The snake oil pushers are in trouble when faced with the reality of measurements.
@rodrigosepulvedaschulz
@rodrigosepulvedaschulz Жыл бұрын
great video Amir, I learn with each one of your videos. I was wondering whether somehow your measuring systems could automatically create a filter for Roon ? (like what Audyssey does with your AV receiver).
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Thanks for the kind words. I export all the measurements in the review thread and a member religiously computes filters that can be imported into different EQ setups. My setup itself doesn't have this capability. Please note that these automatic filters tend to be overachievers, creating more filters than you may need.
@oppje6188
@oppje6188 Жыл бұрын
Legend, thank you Amir!
@Jorge-Fernandez-Lopez
@Jorge-Fernandez-Lopez Жыл бұрын
I enjoyed this great and important lesson. Thank you Amir.
@rikardekvall3433
@rikardekvall3433 Жыл бұрын
Great explanation to understanding measurement. A tutorial for all, whom like to see what the sound measure from our speakers. Hope the big speaker manufacturers see this, so you get more consulting work for their products.
@AudioScienceReview
@AudioScienceReview Жыл бұрын
Thank you for the kind remarks. I don't accept consulting work though. I will perform measurements for companies if they don't have the means themselves.
@soberspine
@soberspine Жыл бұрын
Thank tou for making this videos. Easy to understand.
@phillipmorris9847
@phillipmorris9847 8 ай бұрын
thank you
@mr1enrollment
@mr1enrollment 4 ай бұрын
excellent
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