C
apl
Stand Up Comity
That's a drag, man. So I'll get two more opportunities to ruin the thing.
Marik
Pro Microphone Design
Indeed, the ACM3 is a copy of one of the best microphone designes, and its origin goes back to B&O BM3/4. Three main features of the design--1) use of the body itself as a part of magnetic return circuit, 2) use of magnets with no pole pieces, and 3) use of the grill for frequency response shaping, were quite revolutionary for the time. Consequent refinment, esp. use of modern Neodymium magnets pushed the design to a new level, with high output and nice, open sound with quite extended highs.
So indeed, the execution is a limiting factor, but definitely, the mic has a great potential.
The original transformer... well it is "designed" against every possible rule and physics law, resulting in high noise level and sucky sound. Actually, the Edcor mentioned here although has better lamination, but still is not much better than that.
The Lundahl is the only currently commercially available transformer I could recommend. Hold on a second... from inside sources I know that a new premium ribbon transformer is on the way to the market
.Here is a couple tracks recorded simultaneously. The first is a highly modified ACM3 and second is original Stellar RM3 (the same, rebranded mic) . Pay attention to the noise difference:
Best, M
R
redddog
New member
When you say "heavily modded," what exactly did you do?
WhiteStrat
Don't stare at the eye.
If you're curious, here's a listen that compares the ACM3 to a SM57. Note that the amp was "dialed in" for the 57. If it were just a ribbon, I'd have used slightly different settings. In any case, if you're familiar with the 57, this at least let's you hear the difference--the ribbon is darker and smoother.
Ribbon
SM57
There's more where that came from (different guitars & styles, etc.) so let me know if you want the link.
Ribbon
SM57
There's more where that came from (different guitars & styles, etc.) so let me know if you want the link.
Marik
Pro Microphone Design
Re-machine the motor
Use new magnets
Put a new 1.5um ribbon
Use my own toroid transformer
Use phantom powered circuit
Best, M
Yonce N Mild
Voice of Sanity
I ordered 2 ACM3 to use on guitar cabs. I was wondering what other uses I could get out of these things?
Anybody ever used them as drum overheads?
What about for micing a guitar cab live? These will be my first ribbon mics and I have heard they can be very delicate. To delicate/sensitive to be gigging with?
If I did want to mod them where would I track down a new transformer? I think that's the only mod I am brave enough to try.
Anybody ever used them as drum overheads?
What about for micing a guitar cab live? These will be my first ribbon mics and I have heard they can be very delicate. To delicate/sensitive to be gigging with?
If I did want to mod them where would I track down a new transformer? I think that's the only mod I am brave enough to try.
RightOnMusic
asshat
live might be rough because of the back of the figure 8 pattern picking up all sorts of other stuff.
i've used my acm 3 on trumpet, trombone and violin with BEAUTIFUL results.
i tried the acm 2 for drum overheads and it didn't really strike my fancy. too dark, at least for the kit i was recording.
i've used my acm 3 on trumpet, trombone and violin with BEAUTIFUL results.
i tried the acm 2 for drum overheads and it didn't really strike my fancy. too dark, at least for the kit i was recording.
D
drBill
New member
Well, since I don't have them yet, no. BUT, I've used what they are patterned after to GREAT results. Time will tell.....
bubbagump
New member
I had sagging and stretched out ribbons in both of mine... so they are pretty much on the junk heap until replacement ribbons arrive.
apl
Stand Up Comity
That's like converting a warehouse into apartments, man. All you've got left is the original shell, right?
