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OM1 - What's it about?
Old 22nd June 2021 | Show parent
  #631
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🎧 5 years
Merci !
There is too much piano, and the violin should be more present, I'll try different mics position.
I'm afraid I don't have any bigger room in my apartment
It's 7.7m x 4.2m, 3,7m height 25x14x12'), but there are few furniture in that room, so it's pretty reverberant.
Maybe moving some bookshelves we have in this room, and then add some basstraps would help ?
Old 22nd June 2021 | Show parent
  #632
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🎧 10 years
Quote:
Originally Posted by zoloo ➡️
Merci !
There is too much piano, and the violin should be more present, I'll try different mics position.
I'm afraid I don't have any bigger room in my apartment
It's 7.7m x 4.2m, 3,7m height 25x14x12'), but there are few furniture in that room, so it's pretty reverberant.
Maybe moving some bookshelves we have in this room, and then add some basstraps would help ?
With omnis, you wil not avoid the acoustic of small room of your room. The walls are too close.
Then all depends of what you want to do with your recordings. It's allright until you want to make real recordings for broadcast or CDs and because today we have others listening customs for classical music.
Old 22nd June 2021 | Show parent
  #633
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🎧 5 years
Thanks again for the answer.
The only purpose of the recording is to keep a track of the different pieces of music they play.
They are pure amateurs, so no CD on sight
For me, the motivation is to get better at recording

Maybe I'll try to close mic the piano on tail with the omni, and add a pair of cardioids for the violin
Old 22nd June 2021 | Show parent
  #634
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🎧 10 years
Quote:
Originally Posted by zoloo ➡️
Maybe I'll try to close mic the piano on tail with the omni, and add a pair of cardioids for the violin
I love the OM1 on violin and in general daesn't like cardios on violin.
Myself I would close mic de violin with the OM1. They will also capture the basses of the piano. I would add the cards on the piano.
Old 22nd June 2021 | Show parent
  #635
Here for the gear
 
Quote:
Originally Posted by jamesmafyew ➡️
I have found the Line Audio mics to be more sensitive to EMI (not RFI, just AC line harmonics) than other small-diaphragm mics in my collection. It's only noticeable in proximity to strong magnetic fields, so it won't be a problem everywhere. But, take care not to position the mics near HVAC equipment, dimmer circuits, power distribution, or AC power cords with high-current loads on them. The problem is also much more noticeable in older buildings with poor electrical wiring (usually open grounds).

The attached image is a level-matched comparison of the SE8 Omni and the OM1 both inside a large foam block, inside an iso cabinet, recording just the 'silence'. Each was run with the same type/length of Mogami 2534 cable into adjacent channels of a Sytek MPX-4Aii. Both pick up the room's HVAC rumble very accurately, but it's also easy to see the EMI harmonics picked up by the OM1 (this is NOT acoustic noise, this is electrical interference) that are not present in the SE8 omni (and it's easy to hear them, too, listening to the files). This particular room is in a pretty bad EMI environment, in a building next to a commuter rail line that uses 700VAC power and regenerative braking systems.
Try to send this to Roger directly. It looks like issue.
Old 23rd June 2021 | Show parent
  #636
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🎧 10 years
Quote:
Originally Posted by beefheart ➡️
Try to send this to Roger directly. It looks like issue.
It can also depend on whether pin 1 inside the xlr connector is attached to the outer shell or not. If it’s not it can be worth soldering a small bridging wire and see if this improves or makes it worse. Also try disconnecting the shield at one end of the xlr cable
Old 24th June 2021 | Show parent
  #637
Gear Head
 
Quote:
Originally Posted by studer58 ➡️
It can also depend on whether pin 1 inside the xlr connector is attached to the outer shell or not. If it’s not it can be worth soldering a small bridging wire and see if this improves or makes it worse. Also try disconnecting the shield at one end of the xlr cable
I've checked them out and they're fine, good continuity between pin 1 and chassis. I have lots of OM1s and CM4s and they all exhibit this behavior, so I doubt it's a defect. The above example is a particularly bad EMI/RFI environment.
Old 9th July 2021 | Show parent
  #638
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🎧 15 years
Quote:
Originally Posted by jamesmafyew ➡️
Each was run with the same type/length of Mogami 2534 cable into adjacent channels of a Sytek MPX-4Aii. Both pick up the room's HVAC rumble very accurately, but it's also easy to see the EMI harmonics picked up by the OM1 (this is NOT acoustic noise, this is electrical interference) that are not present in the SE8 omni (and it's easy to hear them, too, listening to the files).
Maybe out in the weeds, but every Sytek I've looked at shows increasing power harmonics from channel 1 to channel 4. 1-2 usually pretty close, but a little diff, a lot in channel 4. Factor that in FWIW.
Old 11th July 2021 | Show parent
  #639
Gear Head
 
Quote:
Originally Posted by emrr ➡️
Maybe out in the weeds, but every Sytek I've looked at shows increasing power harmonics from channel 1 to channel 4. 1-2 usually pretty close, but a little diff, a lot in channel 4. Factor that in FWIW.
In which case, the SE8 should show more, since it was on channel 2 while the OM1 was on channel 1. But these harmonics are way, way higher than anything produced by this preamp, which I've tested (all channels) with a 150-ohm dummy load on the inputs.
Old 31st July 2021 | Show parent
  #640
Gear Head
 
SRS now has a 45cm A-B bar for the OM1:
https://www.shapeways.com/product/JW...ab45-om1-sprue

It requires some user assembly, since the finished product was apparently a little too large for the bed of the 3d printer.
Old 1st August 2021 | Show parent
  #641
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🎧 10 years
Quote:
Originally Posted by jamesmafyew ➡️
SRS now has a 45cm A-B bar for the OM1:
https://www.shapeways.com/product/JW...ab45-om1-sprue

It requires some user assembly, since the finished product was apparently a little too large for the bed of the 3d printer.
That’s great if 45cm is a frequently optimal AB spacing for you…what I’d like to see is an adjustable SRS bar using a pair of sliding cylindrical shaft elements, one for each side (one telescoping inside another), with a locking clamp to hold the extensions in place. 38-68 cms width variability would be sufficient…

Last edited by studer58; 1st August 2021 at 03:49 AM..
Old 24th August 2021 | Show parent
  #642
Here for the gear
 
Quote:
Originally Posted by jnorman ➡️
okay - here are a few clips comparing the OM1 to a sennheiser MKH20. this is just one of my wife's flute students, so the playing is a bit iffy. there are 3 sets of clips - one at about 2 feet out from the flute, one at about 4 feet out, and one at about 8 feet out. no EQ, no nothing. I did not change the recording levels between clips (didn't have time to fiddle with stuff). it was interesting watching the meters as she played - the two mics behaved quite differently according to the meters. if I get the chance soon, I will try to get some clips of flute with piano or something a bit more complex. anyway, see what you think.
I had just ordered a pair of Omni1 from Line Audio yesterday after I listened these tracks I think on the 2ft samples, the sound of MKH20 is too beautiful to be a flute, it sounds like a superman plays a ultra heavy 24k gold or platinum flute…please pay attention to the lowest notes on bar5 and bar6 (if counting in 3) and the Omni1 reproduced a more healthy sound of the flute without making up. However, on the 8ft samples the MKH20 showed more details and overtones and the sound of om1 is tighter…
Old 24th August 2021 | Show parent
  #643
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Quote:
Originally Posted by sd270 ➡️
After listening on computer speakers and headphones, I think the MKH20 is far superior to OM1. The tonal accuracy and detail is much better, I can hear the vibrato, tonal variation and dynamics more clearly. The OM1 seems flat and slightly compressed and a bit diffuse by comparison.
Yes, the sound of mkh20 is beautiful, it almost doesn’t sound like a flute and the sound of om1 is more honest on the 2ft sample to my ears, but she exposed her shortcomings on the 8ft sample
Old 22nd December 2021
  #644
Deleted 1a5f226
Guest
I used to have a pair of CM3s and loved them, might grab a pair of CM4s and a pair of Omni 1s soon.

Quick question for OM-1 or Omni1 owners:

I may be mistaken, but seem to remember reading somewhere that not all omni mics exhibit zero proximity effect, only a specific type or subset of omni mics. Is that the case? And if so, do the Omni 1s have proximity effect when used up close? I am looking to try shooting out cardioid and omni mics up close on an acoustic guitar, but I need it to be the type of omni that does not have proximity effect, like a Neumann KM83.

Thanks for any info, and sorry if it's been answered already in the thread, I couldn't find any info with a search.
Old 22nd December 2021 | Show parent
  #645
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🎧 10 years
Quote:
Originally Posted by Gregg Hermetech ➡️
I used to have a pair of CM3s and loved them, might grab a pair of CM4s and a pair of Omni 1s soon.

Quick question for OM-1 or Omni1 owners:

I may be mistaken, but seem to remember reading somewhere that not all omni mics exhibit zero proximity effect, only a specific type or subset of omni mics. Is that the case? And if so, do the Omni 1s have proximity effect when used up close? I am looking to try shooting out cardioid and omni mics up close on an acoustic guitar, but I need it to be the type of omni that does not have proximity effect, like a Neumann KM83.

Thanks for any info, and sorry if it's been answered already in the thread, I couldn't find any info with a search.
True omnis don't have proximity effect and the OM1 is a true omni without any proximity effect.

Omnis with proximity effect are the ones made with two cardioid caps back to back like the multi polar patterns mikes (AKG 414 for exemple).
Some good infos here https://www.audiogearz.com/what-is-t...ximity-effect/
Old 22nd December 2021 | Show parent
  #646
Deleted 1a5f226
Guest
Quote:
Originally Posted by mathieujm ➡️
True omnis don't have proximity effect and the OM1 is a true omni without any proximity effect.

Omnis with proximity effect are the ones made with two cardioid caps back to back like the multi polar patterns mikes (AKG 414 for exemple).
Thank you so much for answering this so quickly and succinctly! I'll order a pair soon.
Old 22nd December 2021 | Show parent
  #647
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🎧 10 years
You won't regret this purchase.
I don't know what you'll record, but the OM1 are really great with acoustic instruments. Here a recent sample
Attached Files

Extrait OM1.mp3 (1.77 MB, 122 views)

Old 22nd December 2021 | Show parent
  #648
Deleted 1a5f226
Guest
Quote:
Originally Posted by mathieujm ➡️
You won't regret this purchase.
I don't know what you'll record, but the OM1 are really great with acoustic instruments. Here a recent sample
Cheers, that sounds lovely on the ATCs, like being there. It will be purely for my Lowden acoustic guitar, I want to try the CM4 and the Omni1. I had a pair of CM3s before and they were great. Sold them when I got my matched pair of KM84s, but they are now worth double what I paid and am considering selling them.
Old 22nd December 2021 | Show parent
  #649
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🎧 5 years
Quote:
Originally Posted by Deleted 1a5f226 ➡️
I had a pair of CM3s before and they were great. Sold them when I got my matched pair of KM84s, but they are now worth double what I paid and am considering selling them.
Honestly, if you're going to sell the KM84s and use the money to buy new mics, I'd seriously consider a pair of Gefell M950s for guitar. Obviously a lot more money than a pair of CM4s and a pair of Omni1s combined but based on reports by Earcatcher and others the M950 wide cardoid is magical on guitar.

I have a pair of the CM3s and a pair of the OM1s and have tried them both on my guitar (an acoustic 12-string) and they're both very nice but not the holy grail. My current favorite is the Samar AL959 stereo ribbon which despite warnings about it not fully capturing the harmonic complexity of stringed instruments sounds quite true to life on my 12-string. But I'm saving up for a pair of the Gefell M950s.
Old 22nd December 2021 | Show parent
  #650
Deleted 1a5f226
Guest
Quote:
Originally Posted by bradh ➡️
Honestly, if you're going to sell the KM84s and use the money to buy new mics, I'd seriously consider a pair of Gefell M950s for guitar. Obviously a lot more money than a pair of CM4s and a pair of Omni1s combined but based on reports by Earcatcher and others the M950 wide cardoid is magical on guitar.

I have a pair of the CM3s and a pair of the OM1s and have tried them both on my guitar (an acoustic 12-string) and they're both very nice but not the holy grail. My current favorite is the Samar AL959 stereo ribbon which despite warnings about it not fully capturing the harmonic complexity of stringed instruments sounds quite true to life on my 12-string. But I'm saving up for a pair of the Gefell M950s.
Thanks. I really want to try an omni though, I want to get in close without proximity. I want the sound Stephen Barncard captured on Crosby's debut album, (my fave ever recorded acoustic guitar tones), and he told me they were AKG C60s (valve mics) with the omni capsules, up really close.
Old 22nd December 2021 | Show parent
  #651
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🎧 5 years
Quote:
Originally Posted by Deleted 1a5f226 ➡️
Thanks. I really want to try an omni though, I want to get in close without proximity.
Yes, it's pretty amazing. I have a matched pair of Earthworks QTC-40s and have used those up close on my 12-string and it's fantastic. I actually think the Samar stereo ribbon sounds better to my ears but I was using different interfaces for these recordings so it's not a fair comparison. (My Sonosax M2D2 can't handle the Earthworks mics without modifications by Sonosax; they draw too much power, so I use a Sound Devices MixPre 6 with the Earthworks mics.) I find the OM-1 a little dull in comparison to the Earthworks mics, even up close, although that could probably be addressed with some EQ. The OM1 is a nearfield omni; the Earthworks is not and has the usual high-frequency bump of diffuse-field omnis so it'll always sound a bit more sparkly up close compared with the OM1.

Speaking of Earthworks, their SR-30 cardioid is also excellent for guitar and since it's designed for live performance you can get quite close (6 inches) without any proximity effect. But you can get even closer with the omnis.
Old 25th December 2021 | Show parent
  #652
Here for the gear
 
Quote:
Originally Posted by bradh ➡️
Yes, it's pretty amazing. I have a matched pair of Earthworks QTC-40s and have used those up close on my 12-string and it's fantastic. I actually think the Samar stereo ribbon sounds better to my ears but I was using different interfaces for these recordings so it's not a fair comparison. (My Sonosax M2D2 can't handle the Earthworks mics without modifications by Sonosax; they draw too much power, so I use a Sound Devices MixPre 6 with the Earthworks mics.) I find the OM-1 a little dull in comparison to the Earthworks mics, even up close, although that could probably be addressed with some EQ. The OM1 is a nearfield omni; the Earthworks is not and has the usual high-frequency bump of diffuse-field omnis so it'll always sound a bit more sparkly up close compared with the OM1.

Speaking of Earthworks, their SR-30 cardioid is also excellent for guitar and since it's designed for live performance you can get quite close (6 inches) without any proximity effect. But you can get even closer with the omnis.
The Earthworks QTC mics are not diffuse-field equalized, so it's interesting that you find the OM1 dull in comparison. On paper both the OM1 and the QTC have a similar flat freq. response. Most probably because of the shape of the mic body, and possibly because the QTC has a smaller capsule as well it has a bit more open pickup pattern than the OM1. The QTC also have a much higher output, also might have better quality eletronics inside.
But both are definitely free-field omni mics.
Old 25th December 2021 | Show parent
  #653
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🎧 5 years
Quote:
Originally Posted by profondo ➡️
But both are definitely free-field omni mics.
I stand corrected, sorry! My pair are actually out of spec and rise a bit more than they're supposed to at the high end (I had them measured by Earthworks last year; I bought them in 2008).
Attached Thumbnails
OM1 - What's it about?-8512d.jpg  
Old 25th December 2021 | Show parent
  #654
Here for the gear
 
Quote:
Originally Posted by bradh ➡️
I stand corrected, sorry! My pair are actually out of spec and rise a bit more than they're supposed to at the high end (I had them measured by Earthworks last year; I bought them in 2008).
IMHO that's not enough of a lift and pretty far up anyway that would make a noticeable difference. On top of other things, the smaller capsule, different electronics and design, etc, the sparkly character you hear could be also the result of the QTC's metal diaphragm, the higher tension or more precisely the combination of all kinds of these differences between the two mics rather than the frequency response alone. There's a lot going on within and beyond what mic makers are marketing their stuff with.

There might even be a subjective factor in it, as different people preceive audio playback differently. I'd venture to say the QTC is 'very fast'. A friend of mine called it 'infinitely sterile' and I tend to agree with that too.

The OM1 is a fine mic on it's own, it's a great bang for the buck. It's great to have choices.
Old 17th January 2022
  #655
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🎧 15 years
Just a quick FYI: current mics from Line Audio now ship with a K&M clamp instead of the Taiwanese one. No change in price.
Old 17th January 2022 | Show parent
  #656
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🎧 10 years
Quote:
Originally Posted by jpgerard ➡️
Just a quick FYI: current mics from Line Audio now ship with a K&M clamp instead of the Taiwanese one. No change in price.
Hi JP,

That sounds good....is there any chance of you uploading a phone photo of the clamp, or a K&M part number for it ? Thanks !
Old 17th January 2022
  #657
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🎧 15 years
Old 17th January 2022 | Show parent
  #658
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🎧 10 years
Thanks JP..it looks similar to a Sennheiser clamp I recall from many years ago, maybe still current ? Is that a 5/8>3/8 adapter also included at the threaded end of the clamp ?

One aspect I very much appreciated in those previous Taiwanese Line Audio clamps was the inbuilt brass double threading of both 3/8 and 5/8...it was extremely satisfying not to have to carry a separate adapter (like the one shown here, or the simple metallic barrel adapters found everywhere !!)


They did also have very few 5/8"threads, but it was usually enough to still ensure a firm attachment.

That one aspect alone is what I would miss most from the Taiwanese original-generation clamps...but i guess Roger is sourcing them from K&M due to the inevitable 'international supply chain problems'...due to covid ?
Old 17th January 2022
  #659
Company Rep
 
jpgerard's Avatar
 
🎧 15 years
Same system: 5/8" with (included) 3/8-5/8" adapter. The move was due to a number of causes, ie. the recurring insert thread cutting problem was annoying, there was a really painful logistics issue, and moving to EU made products is still important to some folks... supply chain not so much but it's a safer bet to move to German made given what's going on in Asia. Finally, Roger likes being Eco friendly whenever possible and sourcing from within the EU beats importing from Asia.
Old 17th January 2022 | Show parent
  #660
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🎧 10 years
Quote:
Originally Posted by jpgerard ➡️
Same system: 5/8" with (included) 3/8-5/8" adapter. The move was due to a number of causes, ie. the recurring insert thread cutting problem was annoying, there was a really painful logistics issue, and moving to EU made products is still important to some folks... supply chain not so much but it's a safer bet to move to German made given what's going on in Asia. Finally, Roger likes being Eco friendly whenever possible and sourcing from within the EU beats importing from Asia.
Ah ok...I didn't realize that Roger himself was cutting that double thread himself into the previous Taiwanese mount...I'd assumed it came pre-fabicated that way from Taiwan !

No matter, I can live with the additional plastic adapter as shown...it's easier to remove with a pair of grip pliers than the alternate brass, steel or aluminium barrel adapters... which often get trapped deep inside the 5/8 thread, and are almost impossible to extract (even with a wide thin flat-bladed screwdriver !!)
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