Group Buy Interest?

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Can't believe I made my previous post without stating the most important thing about these mics:

Thanks Chance!!! What you've done for all of is just above and beyond the call...
 
Shockmount question.... I know we ordered 3 shockmounts for the ACM-240s. What we got were 2 "mic clips" (definitely not "shockmounts"). Questions:
a) are these the right things we were supposed to get for the ACM-240, and
b) is our last one still out there somewhere?

Second question... anyone who bought the 582/583 and didn't buy the shockmounts, since there is no included clip to mount these mics, what are you all using to mount them on mic stands? We're looking for an affordable solution, either a clip or a shockmount for these.

Thanks.
 
I'm in the same boat: 583 w/no shockmount. Did get an ACM-4 (the rectangular ribbon mic) and as goofy as it looks the 583 fits right in the rectangulary shock mount for the ACM-4. Not a permanent solution, but it let me test the mic.

I'll be interested to see if anyone mentions a more compatible shockmount...
 
There were several orders for the 582/3 alone (no shock mount)
I just spoke to China and are very upset and apologetic. They want to know what and how many mics have this problem. It seems to be all except the ACM-4 (as a mass problem) They saw the pics and watched the video and don't dispute our claim. Hey that video was a GREAT tool for comunicating the problem. I told them "so far the ACM 2 and 3 seem to be thruout the total order. On the subject of video, perhaps someone could do a ribbon adjust and share it with everyone via you-tube.
 
charger said:
Shockmount question.... I know we ordered 3 shockmounts for the ACM-240s. What we got were 2 "mic clips" (definitely not "shockmounts"). Questions:
a) are these the right things we were supposed to get for the ACM-240, and
b) is our last one still out there somewhere?

Second question... anyone who bought the 582/583 and didn't buy the shockmounts, since there is no included clip to mount these mics, what are you all using to mount them on mic stands? We're looking for an affordable solution, either a clip or a shockmount for these.

Thanks.
Click to expand...
I have a number of other LDC's with shockmounts, some of which will fit the 583.

For those without, there are a number of DIY projects out there:
http://www.geocities.com/nearlymen/diy.html
http://www.microfilmmaker.com/tipstrick/Issue10/shock3_1.html
http://maltedmedia.com/people/bathory/shock.html
 
Got my mics this morning, and just got finished firing them up. I got four, total: the ACM-1 and 3, the 583, and the 6802T. I'm very happy with all of them so far--they all work, everything checks out, all switches are strong, all sound good. And I haven't fried the ribbons yet with phantom power yet (something I never had to worry about before...)

Not too many folks have spoken of the ACM-1 yet, so I thought I'd mention it. The first thing is this: it's BIG. Man, the grill work is ginormous and it's very cool. It's also quite heavy. I remember thinking as I pulled it from the padded stuff sack/case that it came in "I'm not sure I care if it works or not, or how it sounds...it'd be great just to look at, sitting on a desk..." And it sounds great so far, too--rich and strong. Makes my voice seem much deeper, which has always been a goal...

Anyway--thanks Chance for this opportunity; it's been a lot of fun. I really feel like I don't want anything for Christmas this year, having received these...

Cheers-
Chris
 
WhiteStrat said:
I'll have to do some research so I know how to check for loose ribbons, but so far, I'm grooving on 'em.
Click to expand...

I've only opened one of my ribbons, the ACM-2, but if yours looks like mine, the only research you'll have to do is watch the youtube video linked in the other post. That's what mine looks like. :(
 
This Sunday I am going out of town on a two month contract job. I'm not sure how much I will be able to check email since I'll be working in a government facility. I'll try to find a hotel with decent internet access though.

If I don't respond to payment requests during the week don't be upset. Weekends I'll be home so I'm sure to see it then.
 
chance said:
I just spoke to China and are very upset and apologetic. They want to know what and how many mics have this problem. It seems to be all except the ACM-4 (as a mass problem) They saw the pics and watched the video and don't dispute our claim. Hey that video was a GREAT tool for comunicating the problem. I told them "so far the ACM 2 and 3 seem to be thruout the total order. On the subject of video, perhaps someone could do a ribbon adjust and share it with everyone via you-tube.
Click to expand...

I ordered an ACM1, 2 & 3. I shined a flashlight on the back of each mic today and clearly saw sagging ribbons in the ACM2 & 3. The ACM1 has a thick grill so no way to check without opening it. For the ACM2 & 3 they don't sag enough to touch the magnets but very close to it.

Yeah, if some one experienced could walk us through a video or very detailed photos of tightening the ribbons (such as in the post started on this earlier) that would be helpful. I assume a lack of high-end detail is in part caused by the ribbon sag?
 
Hi All
I pulled apart my ACM-1 to get a look at the ribbon. First time I've had a ribbon mic, but from what I have seen/heard/read it looks fine--no sag, no flopping. As a matter of fact, I couldn't induce any untoward movement at all. So that's good, at least to my untrained eye.

The layers of mesh/screen/grater/silk in this thing are quite elaborate! They look like this, outside going in:

1. Exterior basket of screen, backed with finer mesh.
2. Silk
3. Rectilinear sheet of screening (matches exterior)
4. Heavier grill of cheese grater-like material with silk attached to back.
5. Ribbon

The PCB is interesting, if only for how it's labeled.

I've attached some photos of what I saw--sorry about the color rendition, I tried to balance it but it was hard--multiple light sources of differing color temps...
 

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Well sun of a gun. That ribbon is adjustable! :D
That is also a very easy to upgrade transformer. Cinemag makes one that is practically drop-in.
Also, a popular mod with that type of ribbon is to leave those inner plate grills that bolt onto the ribbon assy out.
You just have to be a bit more careful with it.
 
Could that same system be incorporated in the other ribbons? Or is there not enough real estate.
 
MichaelJoly said:
Yeah, great pic of the slots that allow the ribbon clamp platforms to slide fore / aft to adjust tension!
Click to expand...

Thanks, I thought that's what I was looking at, but didn't want to hazard a public guess.

Yes, it would be nice if similar systems were in all of these. There certainly is a lot of room to roam in the head of the ACM-1, though, so maybe not possible(?). Must be possible to downsize the system for other spaces...

tarnationsauce2 said:
Also, a popular mod with that type of ribbon is to leave those inner plate grills that bolt onto the ribbon assy out.
You just have to be a bit more careful with it.
Click to expand...

I could see doing something like that, maybe replacing the plate with just a frame of the same size that has some silk stretched across it, as a compromise.
 
I've been following this thread with more of a technical interest than anything else, since I don't currently have any ribbon mics.

A question for those that know - if you install a ribbon in a mic (say for example at the factory) and then tension it, aren't the folds in the ribbon going to relax to some degree over a period of time under tension?

Wouldn't you have to let the newly ribboned mic sit for a while under tension and then re-tension it (maybe even repeating that cycle more than once) before things settle down?

Am I off base here? Is that perhaps the missing step?

-Keith
 
According the to Royer web site, once their ribbons are tensioned to the correct resonant frequency they only relax by 1 Hz - a very minor, unoticable amount and not worth the time it would take to retension.

Any loss of tension beyond this minor amount comes from external stimuli - and not from an inherent loss of tension in the corrugations. It is for this reason that many of the classic ribbon mics were equipped with short, captive cables. Connection to a mic terminated in this fashion was made via the captive cable - mechanical shock to the ribbon could be reduced.
 
did anyone else buy an ACM 560? i'm experiencing a low level 60 cycle hum from this mic. troubleshooting narrowed the problem down to the mic itself and it occurs in BOTH 560s.... not sure what to do about this.
 
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