How to select crossover point on a compression driver
Ғылым және технология
Here I show how to select the best crossover point for your compression driver for the best sound quality. I look at all the aspects that influence the sound quality and demonstrate by playing female vocals at the various crossover points to get a sense of the sound difference.
This video the beginning of a narrative on how to effectively expand the bandwidth of a modern compression driver for audiophile use. I will be looking at ways to lower the fundamental resonance by modifying certain parts of the driver. It won’t be this driver though. I have the DE400TN that I will be working with. It has the same specifications except it uses a Neodymium magnet instead of ceramic. It’s been my experience that the Neo sounds subjectively better so I will start with this driver. Lowering the fundamental resonance will also lower the sensitivity, and lower the power handling since we are diving into lower frequencies. However since we are using this in an audiophile application these are acceptable trade offs in order to get extension down to my target of 600Hz. I chose 600Hz because this is the lower cutoff for my ES600 Biradial horn that I’ve developed that I plan to pit head to head against the classic Yuichi style horn, which I will also be building for comparison. So yes, there’s certainly a lot ahead for this series of videos so stayed tuned!
Пікірлер: 22
Great video! Would love to get myself a DATs unit to do measurements myself. Youve just pushed me along more!
Hey man, I hope you see this, Ive been trying to track down a video that was by you where you showed how tweeter placement affected the time alignment, I cannot for the life of me work out which video it was! thankyou so much for all the work you share on here ive learnt an incredible amount.
@JosephCrowesDIYSpeakerBuilding
3 жыл бұрын
Was it the 1159 video? I compare horn loading versus regular baffle for the SB dome.
Helpful - Thank you
that's brilliant
Excellent vids man. I am about to try something for some Tannoy HPD compression drivers and a beginners guide to high frequency horn loading would be most helpful hehe. Keep it up!
@joeleugene4406
2 жыл бұрын
You probably dont give a shit but does anyone know a tool to get back into an Instagram account..? I was stupid forgot the login password. I would love any tips you can give me.
@bowenlennon178
2 жыл бұрын
@Joel Eugene Instablaster ;)
@joeleugene4406
2 жыл бұрын
@Bowen Lennon thanks so much for your reply. I got to the site on google and I'm waiting for the hacking stuff atm. Takes quite some time so I will reply here later with my results.
@joeleugene4406
2 жыл бұрын
@Bowen Lennon It worked and I finally got access to my account again. I'm so happy! Thanks so much, you saved my ass :D
@bowenlennon178
2 жыл бұрын
@Joel Eugene glad I could help :D
When you say a crossover point of 2.2 khz are you talking electric or acoustic?
Unless you are using an extraordinarily high crossover slope (which tends to not sound good), you won’t have much attenuation of the 1.8 kHz resonance if you cross over that close to it. 2X would be a better place to start.
Higher crossover points is a very wise policy
Has a BMS drivers "burning" or breaking period???
How much does the small step at the throat effect the plots? You need to do this with my Altec 288 and 804 multicell horns.
@JosephCrowesDIYSpeakerBuilding
5 жыл бұрын
This video the beginning of a narrative on how to effectively expand the bandwidth of a modern compression driver for audiophile use. I will be looking at ways to lower the fundamental resonance by modifying certain parts of the driver. It won’t be this driver though. I have the DE400TN that I will be working with. It has the same specifications except it uses a Neodymium magnet instead of ceramic. It’s been my experience that the Neo sounds subjectively better so I will start with this driver. Lowering the fundamental resonance will also lower the sensitivity, and lower the power handling since we are diving into lower frequencies. However since we are using this in an audiophile application these are acceptable trade offs in order to get extension down to my target of 600Hz. I chose 600Hz because this is the lower cutoff for my ES600 Biradial horn that I’ve developed that I plan to pit head to head against the classic Yuichi style horn, which I will also be building for comparison. So yes, there’s certainly a lot ahead for this series of videos so stayed tuned!
These impedance peaks are easily flattened by a simple parallell resistor. No need to cross so high
hungry for donuts
I’m confused by your choice of music for judging the crossover point (or any judgement of sound quality). Synthetic music? I assume you know this piece REALLY well or I don’t understand it’s use hear. We’re looking for accuracy of playback. How do you know what’s accurate when it’s synthetic? That’s like judging a camera by taking a picture of a computer graphic you’re not familiar with. How do you know when it’s accurate since you don’t even know what the source looks like. Why not use some music with natural instruments that you are familiar with and would recognize if there’s a problem? Better yet, make a good recording of someone’s voice that you know well. That’s the best test of all. Unless accuracy of playback isn’t the point here.
@JosephCrowesDIYSpeakerBuilding
Жыл бұрын
What makes you think I don’t know what the soundtrack is supposed to sound like? It’s not the first time I’ve heard it reproduced on a loudspeaker.