mercenaris glad it is appreciated. Thanks.

Alex Oms Merry Christmas to you too :D

Rick G thanks! I am starting a 3 way design using the viawave. Not sure about efficiency though. We'll see where it goes. Already have the test boxes built and started testing.

Impulse Audio Thanks! Yeah, high efficiency usually connotes pro or boutique drivers.. Have you ever tried Audax pro drivers? I dunno how they would sound but I liked their cloth domed tweeter I used before. At Madisound they have a 5” paper wideband and a 10” paper woofer in their pro series for a 3-way that seem quite linear for mid and midbass duties for an efficient Viawave project.

Dan B I haven’t really done a comparison. I wouldn’t automatically think the ribbon is better. It really comes down to what you’re trying to do. I think the dome can often sound better. Especially in 2 ways.

Tetrapodum I would be happy to do that except I don’t have a pair. All these tests are for drivers I own or that I’m using in a build anyways. A couple of people have sent me drivers for testing.

Leonid Sobolev I have not heard the Mumford but a lot of people are interested in it. I certainly would like to.

Terence Lau if crossing so high the fountek, definitely. The viawave is nice, but for more conventional applications that require cross overs below 5khz.

Fear Wolf Brewery well Im still gonna work with both of them and listen and compare, but the viawave has really impressed me. The woofer will be the Motus UH205PW1 that I previously tested as it really impressed me as well. I have a few mids to try, but leaning towards the scanspeak 15m

Sorta. I did design two 3 ways, but when I began my renovation I sold the Viawaves in a big sell off. I never finished the other 3 way beyond a test box but it sounded great.

Will Mac haha I suppose you mean RAAL? I dont have a 7cm RAAL here or I would. Actually I dont have any RAAL drivers. And they are not cheap. If the opportunity comes up I absolutely would. As for a capacitor comparison,,, gee that would be hard to pull off. Im not sure I'd be able test them properly or show any difference. Ill give it some thought but not sure Im the guy for that job.

Impulse Audio yes that 4 letter word😁. Have a great christmas and NY

The Patriot Alien I wouldn’t go less than 2khz or use a compression driver.

ken cohagen it’s a guy named Roman who imports them from Russia. He is listed on the viawave website. I just used an Lpad to bring the level down. Was something like 6ohm series 5ohm parallel if I remember right. The impedance of this tweeter is really flat so it’s easy to just adjust the resistor values until you get it where it sounds balanced. And if you use an active dsp XO like a mini dsp you would change adjust the level in the software.

indravatar it’s so the amplifier doesn’t see a short at low frequencies and that the ribbon isn’t over driven at low frequencies. It is safety but necessary.

I have a review of just the GRT 145 where I discuss the efficiency. But they come in around 98db. The manufacturer rates them quite conservatively. The sensitivity peaks around 102db/2.8V/m !!! That's a loud measurement in my shop haha.

Have you considered the B&C 6MD38 dedicated midrange driver? 96dB sensitivity and very low distortion. Zalph Audio rested it and the waterfall plots looked very good.

DjKinetec most ribbons aren’t happy crossing low, especially small ribbons. The Fountek in this video isn’t that big. The AC G3 is quite large and can probably handle 2500 without too much concern, But I don’t have first hand experience with it. Note that a large ribbon has other drawbacks. The Viawave is really good because it can handle a pretty low XO and remains short.

@@ImpulseAudioSpeakers Do you know how much the Viawave can be obtained for? Is shipping for it difficult? It seems like there aren't any US distributors. Thank you for the help.

DjKinetec there is a US distributer, last I check he was listed on the viawave website. Are you in the US or CAN?

@@ImpulseAudioSpeakers US

Jennifer WhiteWolf not below freezing (doesn’t get that cold here very often) and I usually wait for a warmer day even if I do the talking on a different colder day. Besides, when it does get cold I store the drivers indoors and bring them out just for the test so they’re warm for the test. Speed of sound is slightly higher in the cold otherwise there is not much difference. Seems like everyone’s comments lately are trying to pick apart my methods. I know what I’m doing even if I can’t give every detail in a 10min video. Why am I doing this again? It’s certainly not for the $10 google pays me. Sorry I’m ranting, it’s a lot of comments like this not just yours.

@@ImpulseAudioSpeakers The "suspensions" of the drivers become stiffer so there is definitely a difference. Subwoofers are even worse. Jennifer is spot on here.

carlos oliveira like I said, the drivers were at room temperature. They don’t cool off that quickly. Besides, I’ve done plenty of comparison testing and temperature rarely impacts performance to any noteworthy amount. Feel free to dismiss the data though. It was free information so not anything you’ll miss out on.

Only if you’re interested in entertaining bats, rodents, whales, and dolphins.

The RAAL 140-15d is capable of pretty good flat response to near 50 KHz. To go higher you are no longer looking at high fidelity drivers.. there are special UHF transducers made for scientific research but the generally have limited energy capabilities, limited bandwidth, and dispersion issues... not for music reproduction, not even for hyper harmonics in wide band DSD recordings.

I'm on Vancouver Island, little town called Ladysmith. If you're ever out this was for a vacation look me up!

analogaudio rules if you want the viawave the North American distributor is a guy named Roman. I think his contact info is on that website. The NeoX3.0 is not as good as the viawave in my opinion. It has a bigger diaphragm so technically can cross lower, but the viawave has great distortion numbers and super high sensitivity. Should be able to cross very low. Everything else about the viawave is better.

Chris Boylan there’s a one man distributer in the US you have to email. His name is Roman.

Chris Boylan email from viawave website: vze2frh5@yahoo.com

Daniel Castiglione do you mean the RAAL tweeters? Not sure what you mean by real tweeters. I've never used a RAAL so couldnt say how they compare if that's what you meant.

Impulse Audio most likely autocorrect:)

Hmm, I can’t remember but if I had to guess, it does. I’m not familiar with magnet hysteresis; and not sure why a neo would be different than a ferrite. I’ll look into that, thanks.

It's more like camera or ribbon resonance. But it is not a problem - it s below crossover frequency. I used both tweeters. CD2 can be used with a lower crossover frequency and Viawave is a bit better on higher frequencies. Both are good. But use those at higher crossover frequencies than manufacturers recommend.

r. grambo what do you think I should have used? Something bigger?

GLYNN TILLERY you should do some research around power response. Off axis response can be just as important as axial. Research is pretty solid in this area.

Think about it. Your speaker doesn't just aim sound directly to your ears. Some of it is reflected off side walls etc. If a speaker was only designed for flat direct sound, you would find it to be exceptionally bright and tipped up in overall balance in room. As was mentioned here, it is the power response that is more important which takes into account the reflected sound as well as the direct (total acoustic output) to produce a flattish response.

@@carlosoliveira-rc2xt one of the main reasons that planar speaker design is superior IS that the pressure wave that is uniform or "flat" as it were which decreases room acoustic anomalies ... people have been so used to dealing with the inherent problems of cone shaped drivers - that they just got used to the less than controlled dispersion.... interaction with room properties should be dealt with at the speaker level more than the hardware level ....

@@rts100x5 The planar speaker has less dispersion to the sides so interacts less with side walls. A wide dispersion speaker should not be considered inferior as it mimics real life. Flat planar speakers have as many weaknesses as they have strengths. While room correction devices can be beneficial, especially in the bass range, I have yet to hear one that is totally transparent in the midrange. Of course this would depend on the resolution of he rest of the system. The speaker is the final link in the reproduction chain and if you think about it your room correction is actually upstream of the speaker even though it is taking it's input after the speaker. Wide dispersion with even power response is the way to go in designing a speaker. It has been shown to be the case and is not an opinion.

My Sy I haven’t used the Bliesma so I can’t say. But I’d love to try it. Both look exceptional.

@@ImpulseAudioSpeakers I'd like to build loudspeaker using PHL 1120 midrange driver so I have to choose ribbon or beryllium- hi SPL with details is the aim of this project. That's why I'm asking.

My Sy that will be a very nice speaker.

@@ImpulseAudioSpeakers do you know any speaker that would match this set? something between 10 and 15 inches? I know that audio elegance is available in the USA, however, customs and VAT shipments mean that the speaker costs 2x more. what would your choice be? Peace and thank you for the answer.

My Sy can you get the JBL 2226?

William Kvist Poulsen I provide the impedance plots. Can’t remember (have to watch my own video to remember) but I believe the viawave was still more efficient. 4ohm is a 3db advantage over 8ohm (consumes double the power). In any case it’s definitely more sensitive.

Dream Diction the comparison was technical. I have another video of these tweeters in 3 way speakers with broad comments on listening impressions.

Why haven't you given me the name of the other video?

Dream Diction umm, cause I couldn't remember the name and didn't think it would be hard to find it if you wanted to see it. Something like high end 3 way. It should be the video in my list after this one.

Here: kzfaq.info/get/bejne/osuEpNqTntCuemQ.html You can always just ask. I can't read your mind even though I try really hard.

You give total emphasis to complex crossovers to force a flat freq/spl response, but measuring the output of any speaker at a given frequency tells you NOTHING about what that speaker sounds like at that frequency. Some of the best sounding speakers in the world have a ragged uneven freq/spl graph line. Dump your computer testing and start using your ears !

Cold outside 🥶

Spunk Nathan not sure what this means...

carlos oliveira sorry but that’s not the case. There’s no need to state it as a unit of percentage. I’m not sure why that would be the case.

@@ImpulseAudioSpeakers You are absolutely wrong here. I'm sure you can research it and eventually find this to be correct. It does kind of diminish your credibility though as this fact is pretty basic. Cheers

carlos oliveira percent is a ratio. Efficiency is the ratio of sound power out for electrical power in. I stated that ratio in decibels instead of percent in this video (dB/watt). They mean the same thing except everyone understands it better as dB/w@1m. More than that most people refer to sensitivity the most (expressed as dB@2.83V@1m). Stating driver efficiency as a 2.138% vs 2.146% would be very cumbersome. Nobody does that. Those are made up numbers by the way. But if you don’t find me not credible that’s ok too.

You get some info yet.

But if you want lower crossover frequency CD2 is preferable. I used both.

@@geokrilov лента лучше АМТ по звучанию и чистоте

@@user-xh2qi7tn2l Наверху - да. Конкретно SRT7 лучше на самом верху чем Мундорф СМ2, но Мундорф можно чуть ниже растянуть.