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CM3 - really THAT good?
Old 17th April 2021 | Show parent
  #2071
Gear Maniac
 
Quote:
Originally Posted by studer58 ➡️
Despite the emergence of the CM4, the CM3 still holds it's own..... here's a NOS pair, no spots or reverb added.... from a concert this (busy !) week... hope you enjoy !
Great Boccherini music! I teach in the Conservatorium in his native town and brings his name!
Old 18th April 2021 | Show parent
  #2072
Lives for gear
 
voltronic's Avatar
 
🎧 5 years
Quote:
Originally Posted by studer58 ➡️
Despite the emergence of the CM4, the CM3 still holds it's own..... here's a NOS pair, no spots or reverb added.... from a concert this (busy !) week... hope you enjoy !
Studer, this is a fantastic performance that you captured quite beautifully. It really shows what a pair of mics that are well placed in a good acoustic can do.

What was the height and distance of your array on this? The (lute / archlute?) attacks in the pp passages are especially present and clear considering there are no spots.
Old 18th April 2021 | Show parent
  #2073
Gear Maniac
 
benoïde's Avatar
 
🎧 15 years
Cm3 used as spots on strings in this recording.
Dpa 4006 with black grids as main pair
Joly modded nt5 on winds
Studio Projects cs1 on piano and solo cello

Old 18th April 2021 | Show parent
  #2074
Lives for gear
 
🎧 10 years
Quote:
Originally Posted by voltronic ➡️
Studer, this is a fantastic performance that you captured quite beautifully. It really shows what a pair of mics that are well placed in a good acoustic can do.

What was the height and distance of your array on this? The (lute / archlute?) attacks in the pp passages are especially present and clear considering there are no spots.
Quite a ways back...perhaps just on the edge of too much ambience (headphones tend to collapse the ambience and don't give a truthful picture on location...esp. closed back cans when monitoring in same room as the performers !)

About 3.5 m back from the front line of the performers, and 3 m high, with mic pair angled down to look at the tops of their heads (all were standing, apart from cellist) It was baroque guitar in fact, 6 string...small body (compared with modern guitar)
Old 23rd October 2021 | Show parent
  #2075
Gear Maniac
 
🎧 5 years
Quote:
Originally Posted by PluckinTones ➡️
here are some samples of my CM3 on a classical guitar:



what do you think?
Very nice! What distance is the space on the stereo bar?
Old 23rd October 2021 | Show parent
  #2076
Gear Maniac
 
🎧 15 years
Quote:
Originally Posted by henry miller ➡️
Very nice! What distance is the space on the stereo bar?
Thank you! The distance is 172 mm.
Old 2nd April 2022 | Show parent
  #2077
Lives for gear
 
🎧 10 years
I apologise if this has been asked (and answered) here already….I’m using a CM3 as a mid mic in a mid-side pair, and am seeking advice on the location of the diaphragm within the cylindrical casing.

Is it located just underneath the perforated end cap….or behind the longitudinal vent-slots ? I’m assuming the same location applies to the CM4. I’d prefer no to open up my CM3 to investigate this, hence my question.

Thanks to J-P Gerard …if you could specify how many mm’s back from the perforated front edge the capsule face is located ?

I’m using it in conjunction with the sE VR2 active ribbon as side mic, and want to vertically-align the 2 ‘diaphragms’ as closely as possible…
Old 3rd April 2022
  #2078
Lives for gear
 
hbphotoav's Avatar
 
🎧 10 years
When I held my CM3 to the light, I caught a glimpse of silver just at the top of the vents. Could be the edge of the suspension of the diaphragm...?
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CM3 - really THAT good?-img_1911.jpg  
Old 4th April 2022
  #2079
Company Rep
 
jpgerard's Avatar
 
🎧 15 years
Don't know how deep the actual diaph. is behind the vents and I don't want to destroy one just to peek inside... but in practice a couple of mm won't matter so trust your gut feeling, should be about right. You can also do a simple phase check with a meter if you're so inclined but again - minutes differences here. Also, when pairing with a ribbon... you'll be in the ball park, since the ribbon dances around and the condenser diaph. doesn't move much so perfect phase alignment is basically impossible and the differences in size as well as the spacing between the transducers will have more impact than perfect alignment, if possible of the transducers. But, all this being said, as I recall, the CM3/4 grille is about 2mm thick then there's a small gap due to the capsule front spacers (factory fit, never open a CM3 or 4 as they may fall off and you'll probably lose them and the mic will be out of whack) then an air gap inside the capsule so maybe another 2 or 3mm so total 5mm from the front surface of the mic is not totally wrong.
Old 4th April 2022 | Show parent
  #2080
Lives for gear
 
🎧 10 years
Thank you for that detail J-P….given that the side vent slots begin about 6mm from the front edge of the mic barrel, the capsule face should be maybe about 2mm in front of the side slots ?
Old 4th April 2022
  #2081
Company Rep
 
jpgerard's Avatar
 
🎧 15 years
Possibly - this is all guess work! There shouldn't be much space between the back of the diaph. and the acoustic network for pattern control, indeed.

Last edited by jpgerard; 4th April 2022 at 01:28 PM..
Old 4th April 2022 | Show parent
  #2082
Lives for gear
 
pencilextremist's Avatar
 
9 Reviews written
🎧 5 years
Quote:
Originally Posted by studer58 ➡️
I apologise if this has been asked (and answered) here already….I’m using a CM3 as a mid mic in a mid-side pair, and am seeking advice on the location of the diaphragm within the cylindrical casing.

Is it located just underneath the perforated end cap….or behind the longitudinal vent-slots ? I’m assuming the same location applies to the CM4. I’d prefer no to open up my CM3 to investigate this, hence my question.

Thanks to J-P Gerard …if you could specify how many mm’s back from the perforated front edge the capsule face is located ?

I’m using it in conjunction with the sE VR2 active ribbon as side mic, and want to vertically-align the 2 ‘diaphragms’ as closely as possible…
if it's any help, I did a rec with it and just presumed the front the capsule was where it picks up the sound, it worked well for me and didn't have any phase issues when rec in M/S. I don't have any photos of it but have a recording somewhere.
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