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slinkp slinkp is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

I'd like to try the shunt resistor trick, as per eg. that old Paul Stamler article, but i have no idea where my soldering kit has got to, and exercising my soldering skills (terrible) is no longer on my list of "fun things to do with my very limited free time". Plugging in a presumably inexpensive thing that's already wired up and seeing if I like it does sound fun though..

So if there's a place or person that sells eg. an XLR barrel with a suitable resistor already correctly wired into it, I'd happily buy one. Google's not turning up such a thing but it's hard to know exactly what to search for..
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Mike Rivers[_2_] Mike Rivers[_2_] is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On 9/15/2020 10:12 AM, slinkp wrote:
I'd like to try the shunt resistor trick, as per eg. that old Paul Stamler article, but i have no idea where my soldering kit has got to, and exercising my soldering skills (terrible) is no longer on my list of "fun things to do


So if there's a place or person that sells eg. an XLR barrel with a suitable resistor already correctly wired into it, I'd happily buy one.


This isn't the sort of thing that becomes a commercial product, though
you might find some on this newsgroup or some other recording-related
forum who will volunteer to make one for you for cost and shipping.

I would, but I won't - because the 600 ohm resistor that Paul came up
with for his article was the best compromise, as evaluated by his
students, for the mic, preamp, and source. Different resistors sounded
different and may sound better than 600 ohms (or no resistor) on a
different source.

The other thing - and maybe now that I think about it, it might not be a
600 ohm resistor after all, but a different value - is that what they
really determined. This is the load on the microphone, which equals the
preamp's input impedance with a resistor in parallel that total 600
ohms. I may not have the number right, but that's the principle.

Paul conducted his experiment using a preamp that he designed and built
himself, so your preamp will be different.

If you want to experiment with varying the load on a microphone, I'd
suggest that you give some consideration to buying a Cloudlifter Z. It's
a pre-preamp with a built-in variable load resistor. Even with the load
resistor switched out, the Cloudlifter will make your SM57 sound better,
and you can fiddle with the variable load to see how (and if) it affects
what you're recording.

https://www.cloudmicrophones.com/cloudlifter-cl-z

Unfortunately it costs about $250 new, but they're available on the used
market.





--
For a good time, call http://mikeriversaudio.wordpress.com
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Roy W. Rising Roy W. Rising is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

I can't seem to find a suitable XLR F/M barrel, how about a 2' cord with a 1% 600 ohm resistor in one end? Send me an email, it's yours for $10, including shipping. ~ Roy
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Roy W. Rising Roy W. Rising is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

Some newsreaders don't include my email, so here 'tis -
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slinkp slinkp is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On Tuesday, September 15, 2020 at 2:02:40 PM UTC-4, Roy W. Rising wrote:
Some newsreaders don't include my email, so here 'tis -


Thanks Roy! I'll email you.


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geoff geoff is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On 16/09/2020 5:43 am, Roy W. Rising wrote:
I can't seem to find a suitable XLR F/M barrel, how about a 2' cord with a 1% 600 ohm resistor in one end? Send me an email, it's yours for $10, including shipping. ~ Roy


Here's one. A bit expensive. A little googling should find one for much
cheaper.

https://www.digikey.com/product-deta...048-ND/1290432

geoff
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geoff geoff is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On 16/09/2020 9:42 am, geoff wrote:
On 16/09/2020 5:43 am, Roy W. Rising wrote:
I can't seem to find a suitable XLR F/M barrel, how about a 2' cord
with a 1% 600 ohm resistor in one end?Â* Send me an email, it's yours
for $10, including shipping.Â* ~ Roy


Here's one. A bit expensive. A little googling should find one for much
cheaper.

https://www.digikey.com/product-deta...048-ND/1290432


geoff



Here's a cheaper one. This is from a New Zealand distributor, but I'm
sure equiv available anywhere in the world.

https://jansen.nz/product/signal-ada...etal-1842.htmx
( that is about US$3.50).

geoff
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Scott Dorsey Scott Dorsey is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

Roy W. Rising wrote:
I can't seem to find a suitable XLR F/M barrel, how about a 2' cord with a 1% 600 ohm resistor in one end? Send me an email, it's yours for $10, including shipping. ~ Roy


Beautiful, Roy! I was going to suggest he drop by a local makerspace with
a cable and a resistor.
--scott
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"C'est un Nagra. C'est suisse, et tres, tres precis."
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Trevor Trevor is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On 16/09/2020 3:43 am, Roy W. Rising wrote:
I can't seem to find a suitable XLR F/M barrel, how about a 2' cord with a 1% 600 ohm resistor in one end? Send me an email, it's yours for $10, including shipping. ~ Roy


Wow Roy pretty generous, that's less than the cost of parts and shipping
surely!

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slinkp slinkp is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On Tuesday, September 15, 2020 at 10:35:26 AM UTC-4, Mike Rivers wrote:
On 9/15/2020 10:12 AM, slinkp wrote:
I'd like to try the shunt resistor trick, as per eg. that old Paul Stamler article, but i have no idea where my soldering kit has got to, and exercising my soldering skills (terrible) is no longer on my list of "fun things to do
So if there's a place or person that sells eg. an XLR barrel with a suitable resistor already correctly wired into it, I'd happily buy one.

This isn't the sort of thing that becomes a commercial product, though
you might find some on this newsgroup or some other recording-related
forum who will volunteer to make one for you for cost and shipping.

I would, but I won't - because the 600 ohm resistor that Paul came up
with for his article was the best compromise, as evaluated by his
students, for the mic, preamp, and source. Different resistors sounded
different and may sound better than 600 ohms (or no resistor) on a
different source.

The other thing - and maybe now that I think about it, it might not be a
600 ohm resistor after all, but a different value - is that what they
really determined. This is the load on the microphone, which equals the
preamp's input impedance with a resistor in parallel that total 600
ohms. I may not have the number right, but that's the principle.

Paul conducted his experiment using a preamp that he designed and built
himself, so your preamp will be different.


Thanks for the thoughts, Mike!

It took some poking on archive.org but I found the article.
It was a UA 610 preamp, did he design those? (Honest question I have no idea)
Point taken anyway - I don't have one
https://web.archive.org/web/20171123...etail/330.html

He says "I chose 698 ohms as a good compromise resistor value that gives a total load of about 500 ohms (±10%) with common available preamp impedances from 1500€“2400 ohms. If you want to tailor the resistor to your preamp or boards actual value, see the sidebar" and then there's a section where he discusses the formula.

Apparently the 610 has a nominal input impedance of 2k according to the article. My Focusrite Scarlett 2i2 is even higher at 3k.
By his formula, 600 ohms would work for me: 1 / (1/500 - 1/3000) = 600

If you want to experiment with varying the load on a microphone, I'd
suggest that you give some consideration to buying a Cloudlifter Z. It's
a pre-preamp with a built-in variable load resistor. Even with the load
resistor switched out, the Cloudlifter will make your SM57 sound better,
and you can fiddle with the variable load to see how (and if) it affects
what you're recording.

https://www.cloudmicrophones.com/cloudlifter-cl-z

Unfortunately it costs about $250 new, but they're available on the used
market.


Those do look fun to play with. Thanks!


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Mike Rivers[_2_] Mike Rivers[_2_] is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On 9/15/2020 2:45 PM, slinkp wrote:

It took some poking on archive.org but I found the article.
It was a UA 610 preamp, did he design those? (Honest question I have no idea)


No, Paul didn't design the UA 610. My recollection was that they
performed this experiment with a preamp that Paul called Project-R,
which was published as a DIY project in a multi-part article in
Recording Magazine, back when people would build relatively complex
gadget like that preamp.

Anyway, thanks for the link to the article.

https://web.archive.org/web/20171123...etail/330.html


Apparently the 610 has a nominal input impedance of 2k according to the article. My Focusrite Scarlett 2i2 is even higher at 3k.
By his formula, 600 ohms would work for me: 1 / (1/500 - 1/3000) = 600


That makes sense. The closest standard 10% value to 600 ohms is 610 ohms
- close enough, particularly since you don't know exactly what the
preamp's input impedance is, exactaly, and and at what frequency that
was measured. The idea is just to get close to a 500 ohm load across the
mic.

Oh, and as to Roy's offer - there's nothing wrong with using a pair of
XLR's with a short piece of cable between them. Just be sure you mark
the cable so you'll know what it is when you dig it out of your junk
cable box 20 years from now.

Oh, qne the genuine Male-Female barrel is the Switchcraft S3FM:

ttps://www.markertek.com/product/s3fm/switchcraft-s3fm-xlf-xlm-unwired-feed-thru-audio-adapter.


Roy's $10 offer is a better deal.


--
For a good time, call http://mikeriversaudio.wordpress.com
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geoff geoff is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On 16/09/2020 2:35 am, Mike Rivers wrote:
On 9/15/2020 10:12 AM, slinkp wrote:
I'd like to try the shunt resistor trick, as per eg. that old Paul
Stamler article, but i have no idea where my soldering kit has got to,
and exercising my soldering skills (terrible) is no longer on my list
of "fun things to do


So if there's a place or person that sells eg. an XLR barrel with a
suitable resistor already correctly wired into it, I'd happily buy one.


This isn't the sort of thing that becomes a commercial product, though
you might find some on this newsgroup or some other recording-related
forum who will volunteer to make one for you for cost and shipping.

I would, but I won't - because the 600 ohm resistor that Paul came up
with for his article was the best compromise, as evaluated by his
students, for the mic, preamp, and source. Different resistors sounded
different and may sound better than 600 ohms (or no resistor) on a
different source.

The other thing - and maybe now that I think about it, it might not be a
600 ohm resistor after all, but a different value - is that what they
really determined. This is the load on the microphone, which equals the
preamp's input impedance with a resistor in parallel that total 600
ohms. I may not have the number right, but that's the principle.

Paul conducted his experiment using a preamp that he designed and built
himself, so your preamp will be different.

If you want to experiment with varying the load on a microphone, I'd
suggest that you give some consideration to buying a Cloudlifter Z. It's
a pre-preamp with a built-in variable load resistor. Even with the load
resistor switched out, the Cloudlifter will make your SM57 sound better,
and you can fiddle with the variable load to see how (and if) it affects
what you're recording.

https://www.cloudmicrophones.com/cloudlifter-cl-z

Unfortunately it costs about $250 new, but they're available on the used
market.


I used to manufacture' them for sale. I used a 750R resistor, a better
compromise I found. 600R takes the combined load Z too low.

geoff
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geoff geoff is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On 16/09/2020 2:12 am, slinkp wrote:
I'd like to try the shunt resistor trick, as per eg. that old Paul Stamler article, but i have no idea where my soldering kit has got to, and exercising my soldering skills (terrible) is no longer on my list of "fun things to do with my very limited free time". Plugging in a presumably inexpensive thing that's already wired up and seeing if I like it does sound fun though.

So if there's a place or person that sells eg. an XLR barrel with a suitable resistor already correctly wired into it, I'd happily buy one. Google's not turning up such a thing but it's hard to know exactly what to search for.


Ask any local electronic/TV/appliance repair place - they'd happily do
it for you for a few $$$ ( or a beer) if you turn up with the bits.

geoff
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Roy W. Rising Roy W. Rising is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On Tuesday, September 15, 2020 at 7:12:44 AM UTC-7, slinkp wrote:
I'd like to try the shunt resistor trick, as per eg. that old Paul Stamler article, but i have no idea where my soldering kit has got to, and exercising my soldering skills (terrible) is no longer on my list of "fun things to do with my very limited free time". Plugging in a presumably inexpensive thing that's already wired up and seeing if I like it does sound fun though.

So if there's a place or person that sells eg. an XLR barrel with a suitable resistor already correctly wired into it, I'd happily buy one. Google's not turning up such a thing but it's hard to know exactly what to search for.


And so, after an interesting discussion about loading vs. non-loading of mics, someone told me about the "Lower-Z" - $13.99 from FireHouse Audio. https://www.fhaudio.net/ . Their low-information description is amusing ... "Less Resistance Means Fuller Tone", and more! [I didn't know the brush company had a sound division.]

Roy W. Rising "If you notice the *sound*, it's wrong."

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Richard Crowley[_4_] Richard Crowley[_4_] is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

My source for XLR-female to XLR-male "adapters":
https://www.audiopile.net/CA-301-GL

That one comes wires as a "ground=lift" (i.e. pin 1 disconnected).
But easily modified to restore pin-1 ground thru, and you can add whatever other components easily.
An extra load resistor, or a pad or filter or whatever......


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geoff geoff is offline
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Default Does anybody sell pre-made resistor "gizmos" for sm57/58 mics?

On 30/11/2020 7:23 pm, Richard Crowley wrote:
My source for XLR-female to XLR-male "adapters":
https://www.audiopile.net/CA-301-GL

That one comes wires as a "ground=lift" (i.e. pin 1 disconnected).
But easily modified to restore pin-1 ground thru, and you can add whatever other components easily.
An extra load resistor, or a pad or filter or whatever......


I use Proel-branded ones, with no lift.

geoff
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