Hi,
Can anyone comment on the effect of the waveguide in the ATC SM75-150 mid? I've seen a faceplate kit on Solen to replace it for one without a waveguide. If I removed the waveguide I could probably mount my tweeter about 1cm closer to the mid, is it worth it? Will I get a wider top end dispersion without it?
Can anyone comment on the effect of the waveguide in the ATC SM75-150 mid? I've seen a faceplate kit on Solen to replace it for one without a waveguide. If I removed the waveguide I could probably mount my tweeter about 1cm closer to the mid, is it worth it? Will I get a wider top end dispersion without it?
I suppose but the waveguide is one of the best things about that driver.
It has some beautiful off axis curves with it.
I would have thought that it is the ATCs magnet size which determines the distance to the tweet.
It has some beautiful off axis curves with it.
I would have thought that it is the ATCs magnet size which determines the distance to the tweet.
Your probably right. I find it hard to believe that small waveguide can hold the directivity down to the lower range of the driver, but looking at the aeronet plots it does seem to do well at least until 30deg. I'll keep it as it is 🙂
I have tested both with the Solen plates and with the wave guide .
Sounds much more open with Solen plates for sure .
Less directional too .
Sounds much more open with Solen plates for sure .
Less directional too .
no I dont but I have a good ear and sounds much better
make out a template out of plywood 1/8 inch and do the test yourself
make out a template out of plywood 1/8 inch and do the test yourself
I was wondering if it's possible to remove the waveguide from these, but when I unscrewed the screws, the top comes off together with the actual dome.
Did I miss something?
Did I miss something?
I had it done so no idea but be carefull they are not cheap to fix .
ask before you get in trouble
ask before you get in trouble
I have some spare ATC domes and wave guides, so i'll have a look tomorrow.
If i remember correctly i have one wave guide which is totally separate, and two waveguides that are attached to the dome/voicecoil assembly. So i'll try and work out what's holding them together and let you know, or at least, post some photos.
I think they might be glued together though.
If i remember correctly i have one wave guide which is totally separate, and two waveguides that are attached to the dome/voicecoil assembly. So i'll try and work out what's holding them together and let you know, or at least, post some photos.
I think they might be glued together though.
I had it done so no idea but be carefull they are not cheap to fix .
ask before you get in trouble
ask before you get in trouble
ATC mid dome construction
I hope these pictures can give you some insight into the construction.
I did not take these apart myself so i can't say much.
It does seem however that the dome assembly is probably attached to the wave guide with glue (as appears to be the case between the the dome assembly and the magnet). The dome fabric is probably sandwiched between. No bolts are being used to hold it together because they are not in place here.
Well, i'm only guessing....
I hope these pictures can give you some insight into the construction.
I did not take these apart myself so i can't say much.
It does seem however that the dome assembly is probably attached to the wave guide with glue (as appears to be the case between the the dome assembly and the magnet). The dome fabric is probably sandwiched between. No bolts are being used to hold it together because they are not in place here.
Well, i'm only guessing....
MrWireless, Are the ones with the done attached to the waveguide the straight profile waveguides, and the ones without it attached the curved profile ones? Just guessing.
Everything pictured has the same type of wave guide, which is the standard one that ATC supplies with the mid range unit (i.e. horn loaded).
I'm intrigued by that flatter waveguide Solen sells. Is that an official ATC option or what? Maybe it's something they use on custom installs to get the dispersion right, because i've never seen it on any of their models. I'd love to know how Solen expects anyone to actually install it, given it appears the standard waveguide is glued on, or at least, very securely attached even when the bolts are removed.
I'm intrigued by that flatter waveguide Solen sells. Is that an official ATC option or what? Maybe it's something they use on custom installs to get the dispersion right, because i've never seen it on any of their models. I'd love to know how Solen expects anyone to actually install it, given it appears the standard waveguide is glued on, or at least, very securely attached even when the bolts are removed.
MrWireless, the older (pre 2000?) ATC domes had the straight profile waveguide as pictured. The newer ones have a slightly curved profile so I wondered if the newer ones allow the guide to be removed.
I hadn't noticed that. Right you are, so the pictured ones all have the straight waveguide. Looking at some newer super's i use they do indeed have a different curved profile to them. And then there's that Solen one, which makes it three different wave guides out there.
Some of the ATC waveguides i have seem to be metal and other (newer?) ones are plastic.
Some of the ATC waveguides i have seem to be metal and other (newer?) ones are plastic.
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Not much to do with the waveguide but i may need to replace the coil/cone assembly on one of these. Looking at the pics and the unit at hand i appears the assembly is glued to the magnet structure. How does one remove the glue? I have taken out all bolts with the exception of the one in the centre assuming it holds the pole piece. Any advice appreciated.
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