I am planning a 4 way build. A little bit of an unconventional one (like always with me)
I am looking for a really small dome tweeter. The idea is to get a really like spread of sound throughout the room and the smaller the tweeter, the higher the frequency it falls off. At least, that's how I currently understand it. Feel free to correct me.
I am looking at this Peerless unit and wonder if there are any other small diameter dome tweeters I should be looking at.
https://www.parts-express.com/Peerless-D19TD05-08-3-4-Poly-Dome-Tweeter-264-500?quantity=1
Just for reference, the idea here is to match the octave to the size for proper spread.
8-10" woofer 35-350hz
200-1000hz - 6.5-7" woofer
750-5000hz - 2-3" dome mid
4000 - 20khz - Small diameter dome tweeter.
I believe the diameter of the driver plays a very large role in when the frequency response starts to drop concerning off-axis. Here you see this very tiny tweeter doesn't drop off axis until around 9000hz. So if I stay within the proper octave of the diameter of driver I can basically have an even spread across the room and it won't matter where I happen to sit.
If you have a recomendation of a small tweeter, I would like to hear it. Thanks
I am looking for a really small dome tweeter. The idea is to get a really like spread of sound throughout the room and the smaller the tweeter, the higher the frequency it falls off. At least, that's how I currently understand it. Feel free to correct me.
I am looking at this Peerless unit and wonder if there are any other small diameter dome tweeters I should be looking at.
https://www.parts-express.com/Peerless-D19TD05-08-3-4-Poly-Dome-Tweeter-264-500?quantity=1
Just for reference, the idea here is to match the octave to the size for proper spread.
8-10" woofer 35-350hz
200-1000hz - 6.5-7" woofer
750-5000hz - 2-3" dome mid
4000 - 20khz - Small diameter dome tweeter.
I believe the diameter of the driver plays a very large role in when the frequency response starts to drop concerning off-axis. Here you see this very tiny tweeter doesn't drop off axis until around 9000hz. So if I stay within the proper octave of the diameter of driver I can basically have an even spread across the room and it won't matter where I happen to sit.
If you have a recomendation of a small tweeter, I would like to hear it. Thanks
I like this one. Has a usefully low resonance, sounds good, and it's tiny overall. Mounting isn't the easiest thing, but you can probably 3D print something to deal with that.
Peerless by Tymphany OX20SC00-04
https://www.parts-express.com/Peerless-OX20SC00-04-3-4-Fabric-Dome-Tweeter-264-1002?quantity=1
Peerless by Tymphany OX20SC00-04
https://www.parts-express.com/Peerless-OX20SC00-04-3-4-Fabric-Dome-Tweeter-264-1002?quantity=1
This looks like a really easy driver to manage.
Super easily. You make a bullet shape like those 3 way monitors I made. You use a heat set insert into the printed bullet shape. Then a stud into that. Finally, you just screw in your tweeter since it has a thread in the back
Thats even smaller and drops off even further out. Totally missed this one. Wish it were their silk dome though
I've never used a visaton driver but this is another one I was looking at. Its pretty ugly though.
I heard poly was a pretty decent tweeter material
https://www.parts-express.com/Visat...olycarbonate-Tweeter-8-Ohm-292-552?quantity=1
I heard poly was a pretty decent tweeter material
https://www.parts-express.com/Visat...olycarbonate-Tweeter-8-Ohm-292-552?quantity=1
I have a pair of similar "DTW 72" 14 mm polycarbonate dome/cones.
and now with a small 3d-printed waveguide, installed in place and with same dimension as front plate:
I did not yet listen to them as a complete speaker (no X-over), so I have no sound description yet!
these small poly-domes/cones do not have a "surround", so the cone-shaped edge around the dome is contributing to the sound.
they use ferrofluid and the impedance has no visible resonance peak. At least in my measurement!
SC-5 seems to have a built-in waveguide stub.
EDIT:
and in another CNC machined waveguided baffle, mounted from behind with the original faceplate.
this one is measured at a more reasonable 1,41V @ 50 cm:
the measurements seem to be slightly off with the absolute dB SPL levels. I suspect the last measurement graph is too high (95 dB seems odd).
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Friend's car stereo. First in front sail panels, then on the dash/A-pillar with Dayton ND64's.
I've also used them in a few of my prototypes that needed very tight driver spacing, but these weren't long-term situations.
Very interesting. I did get to play with horns/waveguides with my last build. I achieved similar results as far as getting more low frequency response out of them.
I'm glad you showed me this. I am seeing worse off axis response as the waveguide gets more aggressive. I am going to play around with the Bagby (I think thats what it is called...?) diffraction simulator and see what different size baffles do to it. Right now I am leaning towards doing a bullet shape again. Possibly a bullet shape suspended by wire.
I am. It does work. It will not let me simulate dual woofers and floor bounce though. I'm trying to get around the 100 Hz dip caused by floor bounce. A second woofer should do it but I ant to figure that out before I start designing the woofer section
It's not for sale officially yet, however there are speakers being shown now using it. Maybe if you ask Purifi you could get an early pair.
I think BlieSMa tweeters also have a wide dispersion compared to other domes of its size due to flatter profile along other things. Expensive as well.
Small metal domes seem difficult to find
I think BlieSMa tweeters also have a wide dispersion compared to other domes of its size due to flatter profile along other things. Expensive as well.
Small metal domes seem difficult to find
That's what Room tab next to a Crossover tab in the main design window for. Not at the PC at the moment to show and elaborate.
Metal is not wanted here. Most metal does have severe breakup nodes up high which is where these will be used
Oh, I didn't realize there was a room tab. Can you dim multiple driver diffraction at once? I would like to see the difference in room response between 1, 2, and 3 woofer inline.
Bit of an old myth. Most metal dome break up is outside of the audible range. Soft domes are what typically exhibit break up in the audible range. It's a little silly to pick a tweeter based on it's diaphragm material anymore. The sound of a tweeter mostly comes from how it's integrated.