We Compare 18 Speakers! The Ultimate Guide to Spectral Decays!

[@scottmackey4182]

Amazing information, comparisons and analysis of results. I’m honored to have my SF Venere’s included in this presentation. This difference with the upgrades you designed resulted in better results than I could have imagined. Keep up the great work, Danny!

[@BarryBianculli]

In my opinion, one of your best videos. Really helped to understand the spectral decay/waterfall graphs. Would it be possible for you to perform an actual speaker frequency response and spectral decay test on a video? Also, perhaps one on speaker crossover mods too ... or would that give away too many of your trade secrets? Anyway more educational videos like this would be great.

[@bubbleone6526]

I’ll second that! 👍

[@SavingVegas]

I'm pretty sure I've watched every one of your videos by now and this is one of my favorites. I purchased the Clio pocket measurement system a few months ago so I can measure all my speakers and all the speakers I work on. Because of your channel and all your knowledge you share with us it didn't take me long to get it set up and figured out. This video in particular was super helpful to me to understand whats going on with the speaker. I do my best and try to fix and tweek the speakers I measure and am continuously learning more and more thanks to you.

[@zenskar99]

Look forward to some recommendations for improvements to Vegas, Preston.

[@dannyrichie9743]

You are welcome and thanks for watching.

[@rikardekvall3433]

Danny! You saved my day, with a new and different video on all what you try’s to educate us in all you Tech Talks.

[@povilkami]

I have learned more in 1 hour, than in my 44 years! Great video! Thank you very much!

[@thomasowens5824]

Really good video Danny, very informative, Would have helped to see more pictures of the speakers to imagine how that relates to the graphs, but still good.

[@kevintomb]

or NAMES of the speaker, while the charts are up.

[@sgtgrash]

I Googled each speaker when Danny mentioned the make & model. 😉

[@tonywillans7556]

Yeah, me too re looking up what these speakers look like.

[@51roadrash]

It's been said multiple times but another informative video. I discovered your site a few years ago and it was like getting the keys to the magic kingdom. I have read a lot of technical information over the years, audio, and computer. Your video presentation is a pleasure to watch.

[@sonnoradesign]

I usually don’t post comments but that’s the best video I’ve watched in years! Thanks Danny.

[@danbullock9216]

I purchased the Tyler Acoustic T2's last fall and your crossover design along with Ty's craftsmanship makes for a great speaker.

[@dannyrichie9743]

Thanks!

[@paulijokinen94]

Never though spectral decays are so revealing! This video is absolute gold to my ears!

[@jdacauan]

Great education on audio engineering as usual Danny! Thank you!

[@sjohnston1487]

I learned something useful on a Monday morning. Good start to the week

[@sloboat55]

Always good to get a video from you, Danny. Those Sonicaps are sounding great in my Pedest'ale Tower speakers.

[@wingsounds13]

Thanks for this. Yes, it was a long video, but it kept me watching to the end. Lots of little bits of information throughout.

[@hawkboy71]

Thanks Danny. I'll be the first to admit I don't know what I'm looking at with the graphs in your vids but this has really helped me with this particular graph type quite a bit.

[@sveneisenhauer1]

Always fascinating to see some of the behavior of these speakers and your measures to tame them where needed (to the degree they CAN be tamed in the first place, of course). Thanks for putting so much time into educating us!

[@RetroResurrectionAI]

Great video Danny this is exactly what I was looking for and now understand so much more. Can you please do a video explaining notch, and compensation filters?

[@dannyrichie9743]

That's a good idea.

[@dannyrichie9743]

Check this one out: kzbin.info/www/bejne/j4OlaKh6hayIidU

[@bayard1332]

Excellent. I rather enjoy hanging out with you Danny. In all the videos of yours I've watched you have never said one thing that isn't true (that I have found true in my own acoustics work). Cheers.

[@markblock8659]

Great video, great explanation of those speaker measurements. Very educational.

[@timforman8456]

Excellent video. Thank you Danny!

[@seanb3303]

Great video especially the wide-bander section. Ron really needs to add some chapters I lost my place a few times.

[@stephenyoud6125]

Thanks a lot for that Danny, that explains a lot. From the SPL level I’m guessing his is all from the normal 1W at 1m sweeps. I’ve been measuring and upgrading 3 pairs of Linn Tukans as Atmos surrounds in my Home Theater, using REW / UMIK-1, and REW isn’t showing me anything like your CLIO traces with its waterfall plot. I’ve bought an EMM-6 Dayton mic and Mic amp to use with ARTA software to see if that works better, while keeping an eye open for a used CLIO POCKET. This is definitely another one to go back and watch again. Thanks for all you do for us

[@DannyRichie-uc8sw]

A pocket Clio is well worth it.

[@dell177]

Very informative, thanks for doing this.

[@BLARNEYBLARNEY]

Fantastic video Danny … just fantastic.

[@luanbui8017]

P.s I really really enjoy your channel. U r the Man!

[@audiononsense1611]

Add this one to your top 10 list. Thanks Danny!! Great video...

[@karldegroot3131]

I found your channel recently when I began looking for companies who make quality kit speakers. I've found myself watching tons of your videos as a learning resource for future selection. I'm not an electronics engineer, or, technician, but I am seeing the generalities through your teaching. The fact that you provide resource information and kits definitely puts the ball in your court when, people like myself, begin looking for partial, or, complete kits. I stuck with this video 'til the end and ask (out of curiosity) if you have ever analyzed the older Energy (Pro) 22's from Mirage/Energy...a Canadian company bought by Klipsch...then Audiovox? I have a pair I've not set up in 25 years. I understand their tweeter's ferro-magnetic fluid dried up over time, however. Some could fix them but if their frequency response and spectral decay were not good (which I am learning from you), then there would be no point. If you've time, I would love to hear your opinion. Thank-you for all the great videos.

[@Herman-f9m]

Dang! That was interesting. I could spend years reading books and not learn this much about reading spectral decay graphs.

[@keithgregson9573]

People who become alarmed at ripping speakers apart are ignorant, this is an infinite subject much like RF propagation. Lifelong interest this passion takes, this man spends that time and then shares with us becomes more time is invaluable to us all!

[@Eddie07S]

Yes! I watched it to the end! I hate to admit it, but one thing I have learned from your videos is that I know squat and diddly about speaker design. So much for me thinking “this is easy. I can do that”. Not! So glad I took on building a number of your kits. Thanks for posting; I love learning new things. Lastly - Danny - you mention several times about internal reflections causing issues with spectral decay. Are these controlled by your No-Rez?

[@jdarenvall]

Thank you! Great video. Very educational, i learned alot.

[@brucemibus9523]

Learned so much thanks for taking the time to do it properly ❤❤

[@rodrigoraynor]

Amazing video , I would love if you explain more about d'appolito design and mtm design, thanks for that

[@franklandgraff1190]

Thank you! I did learn a lot!

[@carlosoliveira-rc2xt]

Regarding the LSi 9 speaker, my son drives them without issue with a modest Sony DN 860 receiver. They sound really good (upgraded parts quality). So much for your thoughts on the "impedance is too low and get another speaker" nonsense. Difficult loads have as much to do with phase angles as much as low impedances.

[@subant05]

I have the Tekton Lores and yes there is a bit of ringing as Danny described. But for a floor standing speaker that is $1k, its still a lot of speaker for the money. Yeah, they are not sound staging magicians and there is a bit of ringing, but they sound a lot better than some of the contenders at or almost 2x the price. People who do buy the Lores usually pair them with SET amps, which for me mitigates the ringing a bit. It doesn’t remove it completely, but when I compared to some solid state amps, they sound best with tube. Just my 2 cents.

[@DannyRichie-uc8sw]

We've got an upgrade for those things that will really turn them around.

[@subant05]

@@DannyRichie-uc8sw thanks for the info, but I am happy with my Lores & I’ve since upgraded and relocated the Lores to my wife’s system, since she isn’t that critical 😉. But I have to say, that at least they aren’t Zu speakers.

[@cowboytonydee]

​@@DannyRichie-uc8swDid you measure the version with standard or Beryllium tweeters? Cheers

[@rand9994]

@@DannyRichie-uc8sw hey Danny, I want to make sure that your info is being received correctly. From the vid photo and description of a soft dome tweeter, I'm pretty sure you have the Tekton Lore Reference, which is a mid size model in the Lore line up along with the full size and mini lore. Full size Lores are quite a bit bigger than the reference and have an Audax Gold Dome tweeter. I'm positive that a couple of commenters in here have the full size Lore and I'm confident that they would need a different solution after testing than the models you had. I'm just pointing this out in case people are ordering your upgrade for the wrong speaker. Great vid though.

[@rondickinson8741]

That was extremely informative video that teaches me a lot thank you

[@mcgjohn22]

great review on the data and graphical plots on some of the speakers you have had come through. A bit of a rhetorical question but it would sure be interesting to see how many of these speakers had xovers designed with PC software based on the driver parameters and how many were done using physical measurements? A second rhetorical question would be how many of the original designers saw the drivers ringing in their plots but either A. said to heck with it "we'll use them anyway", or B. how many at the concept stage went back and talked to the driver manufacturer and said can you get some of that ringing out, at the same cost or will the driver cost go up? I know these guys that design at the lower price points are under huge pricing pressure. May not be quite the case when you get north of 4k for a pair of bookshelfs, or 6k for a full range floor stander.

[@dannyrichie9743]

Good questions. Forward this over to some of them and let's see how they respond.

[@petersabsay]

Really interesting to learn about the decay and your tratments. Would like to know how you setup the measurement. Especially where you placed the microphone.

[@dannyrichie9743]

I use an industry standard 1 watt/1 meter.

[@gino3286]

Hi ! thank you very much for this extremely valuable video lecture the first driver was invented in 1861 i read in the web what baffles me is how after about 163 years you can still find speakers that have extremely tacky defects And they are not made by bakers but by specialized companies Sometimes I wonder what kind of checks they do on the products that leave their plants Maybe they do it on purpose to push towards the more expensive products? kind regards gino

[@manitoublack]

Thanks for the lecture😊

[@carbidetooth]

FWIW, the Mark Audio wide band speakers were my interpretation of an S. Lindgren design called "Pensil". The cabinets were finished with two types of RTF (rigid thermofoil). As it turns out, the cabinets were nicer that the drivers. I gave the speakers to my sister who still uses them.

[@viktorcieslar9776]

Děkuji. Hodně si mi pomohl.

[@viktorcieslar9776]

Jednu otázku a prosbu bych měl. Na trhu se objevily Avangard Acoustic colibri. Co na ně říkáš. Mám rád hornové konstrukce. Ten charakter zvuku mi vyhovuje. Jenom nevím, nemám kde poslechnout, jestli to jsou pravověrné Avangard Acoustic které bych zvládl zaplatit a nebo jestli to nejsou jen nějaké life style Bluetooth ,,hračky,, Dík za případný názor. ❤

[@henryfokkema6622]

Great video watching from canada

[@davewin1792]

Amir will be salivating over all this content he can ride on someones coattails. Danny you're a wealth of knowledge. Thank you for sharing with us gear-heads.

[@garganega]

The NS-5000 page on Yamaha's website addresses this problem in an interesting way.

[@jfritzy4358]

Suggest it is time to completely ignore Amir. He recently hijacked a thread on Audiogon with dozens of posts. Per the usual formula, Amir knows all, others are ignorant.

[@davewin1792]

@@jfritzy4358 No kidding. Amir actually reviewed the Parasound JC2 BP. One of the biggest, most jaw dropping moments I've ever experienced in HiFi as a subpar piece of equipment :) Of course he never listened to it I'm sure. He appeals to the pitchfork and torch club that has 0 experience in audio. Danny is really a gem in the industry and is trying to help us make good purchasing decisions, or helping us make the most of the money we've already spent. Spending less in the hobby is what we all should be enbracing.

[@bixite]

Thank you - very informative. How are the measurements done? 1 meter distance? Mic height between mids and highs?

[@sPi711]

I wish you had listed below all of the full range drivers you tested. It would be interesting to go on to some of those manufacturers websites and see what they have for frequency response and spectral decay charts for the drivers that you tested. Especially some of the markaudio drivers.

[@yttean98]

Thanks, I learn a few tricks/techniques here.

[@Leb_-fv5gd]

WOW! Totally brilliant video. I now fully understand what is happening when looking at the graphs. I never suspected or understood what the front lines of the graph were for, now I know it's a timeline. I should have paid more attention to that... Also some very useful information on " toe-out ". Who would have thought that just a few degrees could make a difference. You sir are a super intelligent human being. So from across the pond here in the UK I Thank you very much.

[@dannyrichie9743]

You're welcome.

[@GoggleAX]

Woo! Video release day! 👏🏼🙌🏼

[@Bob-yl9pm]

Good video, we also need to address the 8 inside-corner reflectors in a any rectangular room. Did you test them in an anechoic environment?

[@martybousum1010]

Thank you for your tutelage, sensei!

[@robertgreene2684]

It looks to me as though in almost all cases, the "ringing"" is just what one would expect from minimum phase interpretation of the frequency response(which would of course be true literally for a single driver operating without distortion Sometimes there are ringing effects from crossover stuff but almost always in your plots the ringing comes from the frequency response, In this situation it is not true that if you notch filter the response to flat the ringing is still there A min phase response correction of a min phase resonance not only flattens it, it time (phase) corrects it. This is how min phase systems work. There are nonlinear effects involving delayed energy but on the relatively shallow waterfalls you are showing you are not seeing the chaotic noise effects and so on that can arise. Fix the response and the ringing will be fixed automatically in most cases. (Hilbert transform etc)

[@johnminassian4887]

I really like this video Danny. Thanks for the instruction. I wish all your videos were this long (selfish, I know). How did you make out at the Penn Relays here in Philly back in April?

[@DannyRichie-uc8sw]

Thanks. I tore a hamstring just before the Penn relays and could not go.

[@johnminassian4887]

@@DannyRichie-uc8sw Sorry to hear it.

[@rickg8015]

Norman (Audiocrafters Guild) is a stand up guy.. I’m glad you worked with him on a project..

[@capelight52]

I'm totally new to this but I'm intrigued to understand your videos. What would help is if you can do some sort of pointer to the graphs as you are explaining. The graphs aren't very legible, imo. Perhaps others would love it too or maybe they are way advanced and understand your explanation, which is very articulate. Thank you. I'm going to be ordering an upgrade to my .7's and LRS +. Very cool stuff!

[@Lutznn]

Great video Danny! Ashamed to say that I just bought a pair of those Mark audio drivers for a full range experiment. You provided some useful and potentially alarming insight. Can more damping potentially help to prevent excess ringing?

[@dannyrichie9743]

You can add notch filters to attenuate some of the ringing, but you can't get rid of it. You should have just gone with one of our LGK kits. They are less money and sound a LOT better.

[@Lutznn]

@@dannyrichie9743 I will definitely try your speaker kits one day! I’m based in EU so shipping and customs is a bit of a barrier. Mark audio has a very good reputation on some diy forums so just wanted to see what the fuss was about. It will be interesting for comparison if nothing else. Funny how people have different ideas of what good sound is…

[@adrianenache6794]

What model are those speakers from Mark Audio? I also plan to try pair of 6,5' drivers.

[@dannyrichie9743]

@@adrianenache6794 I don't recall. I was not all all impressed with them. They are a long way from the performance of our LGK models.

[@glenncurry3041]

Great stuff! Few get anywhere near discussing such detailed design concepts and results. Being able to see the measured results from the hardware designs. I know it was covered some before in perhaps a more confrontational time... but I was hoping to learn more about why you choose the parameters you do? Why cut off ay 200hz? Why only 25db of decay? Obviously lower frequencies require removing room interactions more. As I would guess lower level room reflections.

[@DannyRichie-uc8sw]

That sounds like a topic for a new video.

[@DannyRichie-uc8sw]

Measuring lower requires being further away with the mic, but getting far enough away to start accurately measuring down low is hard to do. I can't gate out the room reflections if I get too far away.

[@joewlodynski3521]

Danny, Great Video. Very informative. Have you ever tested a Magnapan Speaker in this fashion???? Thanks, Joe Wlodynski

[@dannyrichie9743]

Yes.

[@jamesrobinson9176]

Hey Danny, I was recently in a semi sealed demo room and really enjoyed the pressurization the room offered. Would giant foam cutouts for my open archways to my listening room help me mimic that speaker demo room?

[@DannyRichie-uc8sw]

I'd need to know a lot more about you room and what your current in room response looks like.

[@sgtgrash]

I have Mark Audio Alpair 11ms drivers installed in Frugal-horn XL cabs. They are directly driven and I have to say they can be a little fatiguing to listen to on occasions, especially when using Class D amplification. I also own a low power el34 tube amp which does calm things down somewhat. I'd like to modify these speakers but I wouldn't know where to begin... lol

[@dannyrichie9743]

You can send one in and have it measured and tested for free.

[@Finite-Tuning]

Good stuff good stuff! Cheers 🍻

[@michaelhastie7324]

The solutions that come from your Research make me continue to hope that there will be a day when GR Research will be able to supply Audio Lovers with a Kit that answers the question.... What more do you need?

[@davidtomsett]

Love to hear the same music track, played before and after treatment

[@benburkett6560]

awsome!!! need to do more of these tutorials. ben burkett

[@Tom-xg1kj]

I like dealing with folks that say do you like your speaker's sound. Heck yes! They are better than most systems I have heard. When people come over and hear them, they are impressed. Could much better and expensive speakers sound better? Sure, but to common folks who do not audiophile issues, the sound improvement may not be worth the cost!

[@Starch1b2c3d4a]

How about some charts and data regarding NoRez? Before and after…

[@DannyRichie-uc8sw]

I will need to get an accellerometer for that.

[@seanjoell]

DANNY......DROPPING THE KNOWLEDGE! YEAH!!.

[@ibakedit5850]

Thank you for this interesting video. Do spectral decays show enclosure resonances?

[@dannyrichie9743]

No they don't. To measure cabinet wall resonances requires an accelerometer that can be mounted to the side of the cabinet.

[@hifiman4562]

For a 1.5 way (woofer section), should the drivers be in separate enclosures?

[@DannyRichie-uc8sw]

In that case, they can share the same air space.

[@GlennPriest]

Great stuff, Thanks !

[@luanbui8017]

Hi Danny, would you please tell me what kind of Loudspeaker measurement system you use and where I can buy it. thank you.

[@dannyrichie9743]

www.audiomatica.com/wp/?page_id=2829

[@AndreaNassisi]

Great channel! Why does your measurement start at 200Hz and not lower?

[@tutnallman]

I think it is the size of his chamber- too small for lower frequencies.

[@ClassifiedBrief]

Add on in room measurements and interpretation please 😊

[@Gilligansrevenge]

Why would you want in room measurements?

[@ClassifiedBrief]

@@Gilligansrevenge because it's helpful knowing good in room and when you need more treatment ect based on speaker to room measurements

[@jon1810]

@@ClassifiedBriefWhat room? Literally millions of options to choose from. Danny’s in room will look nothing like, and way better, than most because it’s treated to be a listening room.

[@burliesanford1863]

Good videos Danny , hey have you ever worked on any Fluance speakers as in the Signature Series towers ? If so how did they measure?

[@dannyrichie9743]

I have not worked on those.

[@burliesanford1863]

@dannyrichie9743 I appreciate the response. I've had the Signature Series Home Theater set for about 2 years now , I'm using a Outlaw 5000x Amp 5 channels driven @ 120watts per channel though a Denon X2700H AVR and drive them them pretty hard because to me good music is supposed to be played loud. I've been seeing reviews on the Signature Series and people reviewing pretty hard pretty much saying they're trash . That's why I reached out to you , thought you might have some insight on them . At 66 years of age I still love my music . You do great work Danny , Thank you.

[@dannyrichie9743]

@@burliesanford1863 Just keep in mind that to offer those at $799 they had less than $200 to work with in building them out complete and that typically includes boxing and packaging material. So don't expect too much.

[@cjg6364]

The garbage "secondary ringing" on the Behringer 2031p you saw at around 1khz corresponds to an internal reflection of the woofer's backwave back through the front ports. It has nothing to do with edge diffraction around the woofer's inner mounting surface and everything to do with the 10 inch cabinet depth, 10 inch cabinet width and 1khz back wave that is reflecting nicely off the back wall of the speaker's enclosure and forward through the ports with little or no insulation damping. Essentially there are three significant errors in design: insufficient insulation damping in the box, front loaded port slots that are almost 1/2 wavelength @1khz in height, and an acoustic path length from the back of the driver to the rear wall and back to the port opening that is approximately 1 and 1/4 of a wavelength at 1khz. Not sure what your background is in engineering acoustics, but this one is pretty obvious just from looking at the dimensions of the box. Overall, your videos are excellent though as they focus on aspects of design that truly matter - spectral decay plots, inter-driver phase integration, etc...

[@captainwho1]

Would the Spectral Decay plots show if a stamped steel basket midwoofer had internal reflections issues of the backwave reflecting off the frame and back through the cone?

[@dannyrichie9743]

A little.

[@davidzoller9617]

The thing about "step-loss" of full range drivers is, that from your argumentation all speaker drivers will face that problem. I'd argue that a small full range driver mostly just got a high fs and quite a limited x-max. They're just not made to produce strong bass.

[@hifiman4562]

Can you teach us how to use the measurement device you use?

[@DannyRichie-uc8sw]

Clip comes with a really good manual. You have to purchase it to get it though.

[@hifiman4562]

@@DannyRichie-uc8sw Sounds good.

[@troymcnett3019]

What is the impedance response?

[@MrTeff999]

I would love to see your analysis of the high end 8” full range drivers from Lowther, Supravox, and Cube Audio (in particular the Fc8). I want to build a pair of Voigt tubes, and I’m wondering if they compare to the Tang Band drivers. BTW, I’m subscribed, but I don’t see how I can send you a Buy-Me-Coffee.

[@davesubers3415]

What are the 5 best candidates to get the most bang for the buck from one of your upgrades?

[@michaelhastie7324]

Who would have thought that some foam in a port or towing speakers out 8 degrees could make That big a difference in the sound? The graphs you are showing actually helps us understand how you solve Many speaker issues. The 20 kilo hertz, ringing was very interesting. That Zoo speaker was a disgrace. When you Repeat what you are saying regarding ringing/ or not makes you more than a You Tube presenter. It makes you an Educator.

[@daviddrake6875]

What about the Sibelius from Pearl Acoustics? What did you think of the Von Schweikert VR-4 second generation?

[@thomasfi1275]

Agree. Measurements of the Sibelius from Pearl Acoustics would be very interesting.

[@dannyrichie9743]

Send one in and I'll take a look at it.

[@King-pv1du]

​@@dannyrichie9743 Hi Danny, may I ask what particular model of the Markaudio drivers did you measure in this video? Based on your video, it seems one the lower tier models of Markaudio. It would also be interesting to measure the Pearl Acoustics Sibelius, as its driver is also based on a modified Markaudio driver (but the higher end series).

[@dannyrichie9743]

@@King-pv1du I think that one was one of their top models at the time. I don't recall the model number.

[@King-pv1du]

@@dannyrichie9743 Having looked further at this video, (based on the shape of the dustcap), I suspect it is one of the entry level models. I'm mentioning this because Pearl Acoustics Sibelius uses a modified driver (by the manufacturer) of the Alpair 10M model (their higher end tier series), which I believe has a lot smoother response than the driver you measured (yeah I think your measurements are accurate on that entry level driver). Furthermore, I personally have the MAOP (magnetic arc oxidisation process) version of the Alpair 10M driver, which is sort of a ceramic bathed/coated version, which in my opinion removes a lot of that resonance issues of those metal cones, which you also might be interested in measuring if ever you get to have the opportunity in getting one. Cheers to you and your team, I've been a fan ever since.

[@rezakhyabani725]

Hi Danny, thank you for this fantastic video. I need to to buy components and schematics for crossover modification of my cheap Yamaha NS-6490 speakers. can you help please. Thankyou

[@dannyrichie9743]

Send one in and I'll take a loo at it.

[@chrisjacques5580]

yes, do have a question: what is phase? I hear you say in/out of phase and degrees out of phase.

[@dannyrichie9743]

Time arrival.

[@chrisjacques5580]

@@dannyrichie9743 ok, how is it measured? How to take account of it in crossover design?

[@dannyrichie9743]

@@chrisjacques5580 The time arrival can be seen in the impulse response. You can also see it in how the two drivers sum or not sum. Changing the vertical off axis can let you see it over a wider range and see what direction it is going.

[@chrisjacques5580]

@@dannyrichie9743 thanks Danny, love the channel by the way

[@troymcnett3019]

What is the impedance response? Explain spectral decay what is it?

[@troymcnett3019]

What is on access response ?

[@bwithrow011]

Danny, a suggestion. Once you start recording your video, wait 1 second before you say, "Hey everybody!" Those 2 words lets viewers know they are viewing none other than Danny Richie!

[@steyeroffgrid]

G'Day quick question, do speakers really need to be run in, and have you done a video on this?

[@dannyrichie9743]

Yes they do. I have documented the compliance change over yours of burn in, and I did shot a video on it too. kzbin.info/www/bejne/pZXdfp1reNilrsU

[@steyeroffgrid]

@@dannyrichie9743 I haven't watched the video, yet, but you are wrong, trust me. Speakers don't know what music they are playing, the get P=IR. They have 2 moving parts, one a rubber "suspension" at the front, the other a coil, neither know what song is being played, neither need running in. I am an Audio Engineer. C.Steyer. If they needed a run in it would be done at the factory, or they would come with a warning sticker on the speaker. If they didn't do this and they actually needed a run in (which they don't) they would blow and you would get replacement, nobody wants that, Mate!!!!!!!!!

[@dannyrichie9743]

@@steyeroffgrid Well, welcome to real world audio. Speakers need burn in. I have documented it several times. Here is one of them: gr-research.com/driver-burn-in-facts/ It is also a known industry fact.

[@dannyrichie9743]

@steyeroffgrid Here is another time that I documented burn in times. gr-research.com/228899-2/

[@raynerstuelgalid]

Please, any link how to do spectral decay measurements? A tutorial, maybe?

[@DannyRichie-uc8sw]

You need a measuring system like Clio.

[@alexandrequesnel912]

What about that kef 70's coral x4 on 2 speakers 4 tweter 3 main 2 woofer vitage

[@phillipmorris9847]

thank you

[@geickmei]

OK! We have added spectral decay to the act. The three audible characteristics of sound fields are the spatial, spectral, and temporal. Virtually every one of these commenters have no awareness of the spatial. This means the pattern of direct and reflected sounds in the room that combine to form the imaging. The spatial cannot be measured, only heard, so they have no way of illustrating the sound in a graph or a drawing, so they just say nothing about it - if they are even aware of it. But they CAN make a drawing of it. It is called the image model of the sound in the room. You just draw a picture of the speakers and their first reflections from the walls nearby as additional virtual speakers on the other side of the walls, like mirror images in light. You can then easily see the pattern of sources in the room and how the reflected sound helps form the "Big Picture" of the imaging.

[@tractioncontroloff9796]

I wonder how Magnepan LRS+ measure

[@DannyRichie-uc8sw]

We have some measurements of that model on our site.

[@jonm3255]

Dang it, I have Polk LSi 9 speakers and just spent 2 days rearranging my room and $400 on acoustic panels (i'm not kidding!). Now I find out the speakers are crap. Please recommend a $1,000 - $1,500 per pair alternative that looks decent (has grills and wood veneer.)

[@veroman007]

elacs used

[@kevintomb]

Having owned the Lsi9 also for several years, they are NOT a crap speaker at all. In fact they sound QUITE good, despite the measurements. I compared them to about 5 other speakers years ago, and they acquit themselves quite well. Here is another case of listening trumping measurements. NOT a perfect speaker for sure, but not bad AT ALL!

[@walterdockins8475]

The previous LSiM703, or current Reserve R200, Legend L200 are a start!

[@carlosoliveira-rc2xt]

​@kevintomb 100% agree and this is from someone with experience of 45 years with very expensive gear.

[@chrisjacques5580]

wonder what you make of the Mission 770 with the polyprop cone

[@dannyrichie9743]

Sind one in and we'll measure it.

[@donnieray746]

Spectrum decay will also have to do with room size. If you ever ran sound for a live band you would know this. People have a tendency thinking bigger is better. Acoustics of a room is everything.

[@dannyrichie9743]

In this case we are looking at the spectral decay of the speaker only (no room reflections).

[@jamestyrer907]

I noticed you didn't mention the crossover filters. While these are commercial products, that doesn't mean that the filters would not have too much 'Q' which could also cause ringing. So, did you check the L, C and Z to see that it had a 'Q' of 1 for a L-R filter?

[@dannyrichie9743]

Crossover parts are not responsible for the ringing seen in a spectral decay.

[@lydiapawlak8564]

Okay, you can tell David Dicks from Audio Nirvana that his large FR drivers were hard to listen too. I had a tech put some AN Super 10" Fr in a regular Monitor size cabinets, and no crossover in a ported cabinet. Sounds good to me... I would love to have them in a TL cabinets. they would have to be 4' x 1' x 1-1/2' towers...

[@dannyrichie9743]

He is the one that sent them to me. I also shared the measurements with him.

[@joewlodynski3521]

Danny, have you ever tested any headphones in this fashion? I am waiting upon the arrival on Tuesday of my Verum 1's from the Ukrane. I recently saw your review on You Tube of the 1's. Thanks again Joe Wlodynski