Sure SM7B andG2 XLR

[g6phf]

Hi,
I am a prospective G2 owner. I have a Sure SM7B which is a good XLR mic but requires 48vdc phantom power.
I assume there is no way I can use this in the G2 XLR port?

Also, what is the advantage of using this port over say the current way that I use it, via an external USB sound card/ Audient ID4 box?
I connect this via USB to Thetis.

Thank you
Mike

[SA3ATF]

Hi Mike.
The SM7B is a dynamic microphone and therefore does not need phantom power (if you don't have a preamp like Cloudlifter, FetHead etc or an SM7DB with a built-in signal booster that you want to use) .
In other words, just plug it into the radio and it works.

[g6phf]

Ahh, thank you. My bad. I do have a cloudlifter I use with it now as the Audient ID4 does not have enough gain. However I think I read the XLR input has some extra gain? So perhaps it will work.

So my next question, how does the microphone path get from XLR to Thetis on my PC ? Can I select the mic input to XLR on the G2, from within Thetis?

[w-u-2-o]

This topic, while a little dated and referring to PowerSDR instead of Thetis, is still 95% applicable:

https://community.apache-labs.com/viewtopic.php?f=12&t=2612

The one difference is that there is now a Pi between the FPGA and Ethernet stages.

To be a little pedantic, it is not an XLR input, it is a balanced TRS input.

It's also worth knowing that some people have had RFI/EMI problems with this input, so you might be on the lookout for that sort of thing.

Edited for correctness per Laurence's post.

[laurencebarker]

You can select the XLR input in both Thetis and piHPSDR. It doesn't have phantom power though: that would require an external injector (which are readily available).

The early radios had an issue with that input, but the preamp has been redesigned to eliminate that problem. I've seen instances of it being used so I assume any newly supplied radio with have the new preamp.

(It wasn't RFI, but seemed like it. It was caused by voltage droop on the 13.8V input cable when the PA took high current when transmitting; the same would happen with an antenna connected and with a dummy load).

[g6phf]

Thanks for the replies.

Looking at the old thread/diagram that wu20 suggested there may be no real advantage to using the TRS mic socket on the back of the G2?
I could continue using the Audient ID4 audio interface and take this input to Thetis?
Or am i missing somehting.
73
Mike

[Svante]

Hi I have G2 and I use Rode podmic with cloudlifter to Focusrite V4 and 48 Volt and is connected to pc with Thetis.
So I guess what you have should work fine.
sm6usu Svante

[g6phf]

Thanks Svante, I may just use this as I also have 2 monitor speakers connected to the Audient ID4
73
Mike

[w-u-2-o]

Thanks for the replies.

Looking at the old thread/diagram that wu20 suggested there may be no real advantage to using the TRS mic socket on the back of the G2?
I could continue using the Audient ID4 audio interface and take this input to Thetis?
Or am i missing somehting.
73
Mike

My recommendation would be to use the Audient route, taking advantage of the cmASIO feature of Thetis. One might argue the quality difference is negligible, but better to have it and not want it then want it and not have it. The Audient approach will also allow you to switch microphones more easily in the future, for instance if you want to take advantage of the many <$100 large diameter condenser mic's on the market.

And, since you already have two monitors attached to the Audient, IMHO that route is a slam dunk. You will get far superior receive audio quality that way. Which monitors, BTW?

[g6phf]

Thanks for the replies.

Looking at the old thread/diagram that wu20 suggested there may be no real advantage to using the TRS mic socket on the back of the G2?
I could continue using the Audient ID4 audio interface and take this input to Thetis?
Or am i missing somehting.
73
Mike

My recommendation would be to use the Audient route, taking advantage of the cmASIO feature of Thetis. One might argue the quality difference is negligible, but better to have it and not want it then want it and not have it. The Audient approach will also allow you to switch microphones more easily in the future, for instance if you want to take advantage of the many <$100 large diameter condenser mic's on the market.

And, since you already have two monitors attached to the Audient, IMHO that route is a slam dunk. You will get far superior receive audio quality that way. Which monitors, BTW?

Thanks, I will stick with this config then. I am using a pair of KRK Rokit 5. My son already had these, so I have repurposed them They seem to work great.
73
Mike

[w-u-2-o]

Those are some great, low-cost monitors.

[Svante]

Hello again Did a quick test to what they call xlr input on back of my Anan G2. With a trs type headphone mic connected to Rode Go Bluetooth mic
Use that normally in my Boat to Sunsdr. It works also to Anan G2 using 6.3mm trs adapter to 3.5 mm plug (6.3 in back of Anan G2) Just a small experiment.
Svante sm6usu

[RobB]

interfacing issues aside I think the SM7B is a poor choice for AR usage with it's dominant low frequency response. A quick investigation to the numerous pod casters "posing" with SM7B's will demonstrate the resultant muddy audio response.