densman

PZM 30FS

11 posts in this topic

I just bought a used Crown PZM 30FS it is silver in color. I need some info on it. The only info I could find was for a 30F. I thought that maybe the "S' just stood for silver, but there is a difference in size and I see no frequency switch that the 30F has. My main concern is do I need a PX-18 transformer to change the impedence from hi to lo? Any help would be appreciated. Thanks, Densman

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The PZM-30, PZM-30F, PZM-30FS, PZM-30R and PZM30D all did not require the PX-18 and could be run with just phantom power. All other earlier models, in the PZM-30 series, needed the a PX-18.

The "S" in the "FS" did stand for silver in color color while the "F" indicated that it had a flatter high frequency response. The "R" designator said the mic had a moderate rise at the higher frequencies.

The PZM-30 (no designator) was basically a PZM-30F while the "D" model has a switch for both flat and rising high frequency response curves. :)

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The PZM-30, PZM-30F, PZM-30FS, PZM-30R and PZM30D all did not require the PX-18 and could be run with just phantom power. All other earlier models, in the PZM-30 series, needed the a PX-18.

The "S" in the "FS" did stand for silver in color color while the "F" indicated that it had a flatter high frequency response. The "R" designator said the mic had a moderate rise at the higher frequencies.

The PZM-30 (no designator) was basically a PZM-30F while the "D" model has a switch for both flat and rising high frequency response curves. :)

2401[/snapback]

The effort of finding, and registering for, this Forum just paid for itself manyfold.

I recently acquired a PZM-30F.

Big quandry was sorting out conflicting info between:

-- "PZM-30R PZM-30F" document [k80351a6.pdf] which sez:

"30R and 30F feature self-contained electronics which allow them

to plug directly into a standard 12-48 VDC phantom power supply."

AND

-- Page 4 of the Summer/04 'Mic Memo' which sez:

"The PZM-6S, PZM-6F, PZM-30GP, PZM-30F and PZM-31S are

legacy (discontinued) Crown PZM's ... [that] got their power

from a Crown PX-T, PA-18 or PX-18 interface ..."

So, if I understand correctly... I should keep on using the PX-18's

that came with my PZM-6LP's, but I can safely plug the 30F directly

into my field mixers [shure FP31 and FP33].

j.

p.s: Darned shame -- though understandable -- that the Mic Memo

newsletters are no longer issued. Hopefully, as I become more

familiar with the 'Crown Forums' I'll discover a way that they can

automagically be periodically piped to me in digest form via e-mail.

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The PZM-30, PZM-30F, PZM-30FS, PZM-30R and PZM30D all did not require the PX-18 and could be run with just phantom power. All other earlier models, in the PZM-30 series, needed the a PX-18.

The "S" in the "FS" did stand for silver in color color while the "F" indicated that it had a flatter high frequency response. The "R" designator said the mic had a moderate rise at the higher frequencies.

The PZM-30 (no designator) was basically a PZM-30F while the "D" model has a switch for both flat and rising high frequency response curves. :)

2401[/snapback]

The effort of finding, and registering for, this Forum just paid for itself manyfold.

I recently acquired a PZM-30F.

Big quandry was sorting out conflicting info between:

-- "PZM-30R PZM-30F" document [k80351a6.pdf] which sez:

"30R and 30F feature self-contained electronics which allow them

to plug directly into a standard 12-48 VDC phantom power supply."

AND

-- Page 4 of the Summer/04 'Mic Memo' which sez:

"The PZM-6S, PZM-6F, PZM-30GP, PZM-30F and PZM-31S are

legacy (discontinued) Crown PZM's ... [that] got their power

from a Crown PX-T, PA-18 or PX-18 interface ..."

So, if I understand correctly... I should keep on using the PX-18's

that came with my PZM-6LP's, but I can safely plug the 30F directly

into my field mixers [shure FP31 and FP33].

j.

p.s: Darned shame -- though understandable -- that the Mic Memo

newsletters are no longer issued. Hopefully, as I become more

familiar with the 'Crown Forums' I'll discover a way that they can

automagically be periodically piped to me in digest form via e-mail.

2466[/snapback]

Yes, keep the PX-18 for the 6LP's and the the 30F should be able to be used with no problems directly.

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The PZM-30, PZM-30F, PZM-30FS, PZM-30R and PZM30D all did not require the PX-18 and could be run with just phantom power. All other earlier models, in the PZM-30 series, needed the a PX-18.

The "S" in the "FS" did stand for silver in color color while the "F" indicated that it had a flatter high frequency response. The "R" designator said the mic had a moderate rise at the higher frequencies.

The PZM-30 (no designator) was basically a PZM-30F while the "D" model has a switch for both flat and rising high frequency response curves. :)

2401[/snapback]

The effort of finding, and registering for, this Forum just paid for itself manyfold.

I recently acquired a PZM-30F.

Big quandry was sorting out conflicting info between:

-- "PZM-30R PZM-30F" document [k80351a6.pdf] which sez:

"30R and 30F feature self-contained electronics which allow them

to plug directly into a standard 12-48 VDC phantom power supply."

AND

-- Page 4 of the Summer/04 'Mic Memo' which sez:

"The PZM-6S, PZM-6F, PZM-30GP, PZM-30F and PZM-31S are

legacy (discontinued) Crown PZM's ... [that] got their power

from a Crown PX-T, PA-18 or PX-18 interface ..."

So, if I understand correctly... I should keep on using the PX-18's

that came with my PZM-6LP's, but I can safely plug the 30F directly

into my field mixers [shure FP31 and FP33].

j.

p.s: Darned shame -- though understandable -- that the Mic Memo

newsletters are no longer issued. Hopefully, as I become more

familiar with the 'Crown Forums' I'll discover a way that they can

automagically be periodically piped to me in digest form via e-mail.

2466[/snapback]

Yes, keep the PX-18 for the 6LP's and the the 30F should be able to be used with no problems directly.

2482[/snapback]

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I noticed alot of noise coming from my PZM 30FS, like a hiss or white noise. It was loud enough to raise the VU meters. I thought it must be the cable so I tried a new one. It didn't make any difference, so I tried the PX-18 that I have for my PZM 31s. No more noise and I think it actually sounds better. ??????????

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I noticed alot of noise coming from my PZM 30FS, like a hiss or white noise. It was loud enough to raise the VU meters. I thought it must be the cable so I tried a new one. It didn't make any difference, so I tried the PX-18 that I have for my PZM 31s. No more noise and I think it actually sounds better.    ??????????

2487[/snapback]

I don't know how it is working with a PX-18 as the PX-18 provides a bias voltage not phantom power to the microphone.

It sounds like you either have a PZM that the cantilever, on the mic plate, has been exchanged or the mic was miss marked somehow.

I would remove the cantilever, from the plate, and see if there is electronics in it. If there isn't than you will need the PX-18. If there is than you do not need the PX-18. A cantilever that requires the PX-18 will work for a while until the phantom power burns out the FET.

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I noticed alot of noise coming from my PZM 30FS, like a hiss or white noise. It was loud enough to raise the VU meters. I thought it must be the cable so I tried a new one. It didn't make any difference, so I tried the PX-18 that I have for my PZM 31s. No more noise and I think it actually sounds better.    ??????????

2487[/snapback]

I don't know how it is working with a PX-18 as the PX-18 provides a bias voltage not phantom power to the microphone.

It sounds like you either have a PZM that the cantilever, on the mic plate, has been exchanged or the mic was miss marked somehow.

I would remove the cantilever, from the plate, and see if there is electronics in it. If there isn't than you will need the PX-18. If there is than you do not need the PX-18. A cantilever that requires the PX-18 will work for a while until the phantom power burns out the FET.

2498[/snapback]

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OK, I removed the cantilever and it does contain electronics. Does the fact that it makes noise and works with the PX-18 mean there's something wrong with it ? Will using the PX-18 hurt anything? Thanks for all your help, Densman. I just had another thought, I have some fluorescent lights in the studio, could that be the source of the noise? The pzm 31s with the PX-18 doesn't have noise but the 30fs has noise without the PX-18 and both are plugged into the same board.

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OK, I removed the cantilever and it does contain electronics. Does the fact that it makes noise and works with the PX-18 mean there's something wrong with it ? Will using the PX-18 hurt anything?  Thanks for all your help,  Densman.              I just had another thought, I have some fluorescent lights in the studio, could that be the source of the noise? The pzm 31s with the PX-18 doesn't have noise but the 30fs has noise without the PX-18 and both are plugged into the same board.

2506[/snapback]

There is a complete and total difference in how a microphone that is powered by phantom power and one that is powered by a Bias voltage operate. In phantom power mics a voltage is applied across pins 2&3 of the XLR and on Bias powered mics either pin 2 or 3 has a DC voltage as referenced to the shield (pin1).

Why your mic is working I don't know. All I can say is it shouldn't be. :huh:

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I recently acquired a PZM-30F. 

Big quandry was sorting out conflicting info between:

-- "PZM-30R PZM-30F" document [k80351a6.pdf] which sez:

       "30R and 30F feature self-contained electronics which allow them

        to plug directly into a standard 12-48 VDC phantom power supply."

AND

-- Page 4 of the Summer/04 'Mic Memo' which sez:

       "The PZM-6S, PZM-6F, PZM-30GP, PZM-30F and PZM-31S are

         legacy (discontinued) Crown PZM's ... [that] got their power

         from a Crown PX-T, PA-18 or PX-18 interface ..."

The Summer 04 Mic Memo is incorrect, but it will be updated with the correct models in a week.

Brubart

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