开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
  1. MicBuilders
  2. Topics

Rode VXLR+ noise

 

I purchased a Rode VXLR+ recently and was very disappointed by the noise introduced by this adapter. I compared a Rode SmartLav+ connected via a TRRS to TRS adapter to the VXLR+ versus a SM58 dynamic mic. With the gains set so that both mics had the same response?to a sound source, the SmartLav+ via the VXLR+ had a much higher background hiss, to the point of being unusable. I got a similar noise level when I connected a 2.2k resistor to the VXLR+ instead of the SmartLav+.? This SmartLav+ works fine plugged directly into a Zoom H1N.

I have read several good reviews of this adapter and a few who have found it very noisy as well.

Zach Poff has published the schematics for the VXLR+ here?

I assume the noise is coming from the zener D1. I measured?the capacitance of C1 and it did measure 10uF. I have not tried to measure its esr.

I changed C1 to a low esr 100uF tantalum capacitor (KEMET Part Number: T520B107M010ATE070). This has a wider body than the original, so you need to offset it towards the center of the PCB so it does not touch the side of the case.

The noise level of my modified VXLR+ is now below the self noise of the SmartLav+. I have also since made some recordings of birds with this adapter connected to a AOM-5024L.

Perhaps my VXLR+ was just a bad one due to variability in zener self noise and capacitor esr. However I am surprised how little effort has been made to filter noise from D1. A simple additional RC filter could make a big difference without making any significant difference to the cost.



David Walton
 

Good morning David,
?
I just discovered the same issue! I use my Sanken COS-11D and Countryman EMW using the Rode Wireless GO II on my Zoom F4 with great results.?
?
However, I tried pluging directly into Rode VXLR + on my Zoom and on my studio mixer, and I get about 10db static noise compared to the Wireless GO II.?
?
I tried 2 different VXLR+ with the same results.?
?
Where did you get your 100uF tantalum capacitor?
?
Thanks
 

I purchased mine from
Mfr. Part No. T520B107M010ATE070

On Thu, 7 Nov 2024 at 23:57, drousseau via <drousseau=gmail.com@groups.io> wrote:
Good morning David,
?
I just discovered the same issue! I use my Sanken COS-11D and Countryman EMW using the Rode Wireless GO II on my Zoom F4 with great results.?
?
However, I tried pluging directly into Rode VXLR + on my Zoom and on my studio mixer, and I get about 10db static noise compared to the Wireless GO II.?
?
I tried 2 different VXLR+ with the same results.?
?
Where did you get your 100uF tantalum capacitor?
?
Thanks



--
David Walton
 

Thanks a lot! Found it on Mouser.ca since I'm in Canada, same part number!

1 - 4 of 4