Heil PR40 or 781g

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  • Updated 4 years ago
Ordered Flex 6500 which microphone should I order Heil 781g or PR40?
Did a search couldn't find the question asked.

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Posted 5 years ago

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Photo of EMIL-DL8JJ


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hi Ian,

buy a real Studio mic and you will be very! happy.

Example: Rode NT-1A, t.bone STC 2000

Connect it direct to the Radio and use Flex equalizer.

vy 73

Emil, de DL8JJ

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Warren Elly

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They are pretty near identical... I have the pro 40 but my Flex 6500 likes my Sennheiser md-421 better... another great performer I've heard on air on 6000 series, Heil Gold Line series...witih Yaesu cable to match flex 8 pin... good luck 73, Warren W1GUD
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Dale KB5VE

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I have used the PR 40 on all the Flex from the 1000 to the 6500. It has performed excellent.i have a friend who used the 781 and it eq ed nicely. To be honest you can use a very wide range of mic on this radio, it is just how much you want to pay for little bit of improvement. The heil 5 element does a great job.
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Jon - KF2E

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There have been several threads discussing microphones. I think it is pretty well established that you can get very good results with just about any mic using the flex equalizer. That said, I would recommend using a balanced mic plugged into the balanced input on the back of the radio. The balanced input is much less susceptible to RF which can sometimes be an issue with a Flex. Personally, I use a PR781 and am very happy with the results.

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Scott AC8DE

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Mic choice is a personal preference.  Short opinion - Either Heil would work quite well.  Use the rear XLR on the 6500 for best results.

Long answer on general mic usage.

It depends upon what you are after in sound.  But ANY dynamic mic will do the job and the EQ in the Flex can make up for a lot of mic inadequacies.

If you want something more of a heavy quality end fire broadcast mic, then perhaps an EV RE20 or the more affordable RE320 are a couple top picks.  Rode makes a good broadcast mic as well, I just can't remember the model.  The Broadcast mics don't have quite as tight of a pattern as the Heil, so you can be a bit more relaxed in position, but they will pick up a touch more room.  (Downward expander cures this.)  This still keep you in the world of dynamic mics.

Some guys are using end fire kick drum mics to get the high-mid and low pre-emphasis, like the MD421.  Another is the Audix D6. The results are pretty amazing with a mic that was not intended for vocals.

Beyond that, you'll be heading into the snobby world of condenser mics, which require phantom power and more external equipment.  These are overkill for amateur radio in general and their pick-up pattern is even wider and more sensitive, which means you can be really relaxed with mic position, but it picks up much more of the room.  A downward expander or gate is generally a must with these for amateur radio to tame the room ambiance.  I use a side address condenser myself, but this is NOT for everyone.

I could go on all day.  The thing with a Flex 6000 series is the input is VERY flat and doesn't load the mic, unlike many other knobbed rigs.  And then it has the built in EQ. So you can make even a very cheap mic sound REALLY good.  e.g.: I have used an old tubby sounding obsolete Audio-Technica hand mic that I own and can make is sound VERY good on the air using the internal EQ.  I have gotten rave audio reports with it and it is a total piece of crap.  A little creating EQing and viola!

Don't spend any more than you have to for a mic, unless you WANT a certain brand or look.  And that is OK too, just don't delude yourself into thinking it makes you sound better on a 3 KHz wide transmitted spectrum.  It's marketing that convinces you of that.

Scott AC8DE
Photo of k0eoo


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I get great audio reports with my PR781, I use it with Flex's recommended EQ settings...  Dennis, k0eoo
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Richard Clafton W4/G7EIX, Elmer

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PR781 in the Balanced Input +20db selected - 75 on Mic Gain - reports are always "Great Audio"

Job done! 
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David G4NRT / Z21NRT

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I am still deciding on a mic and had pretty well settled on a PR-781.  Please pardon my ignorance here but I do have a couple of questions ...

1. If I want to us the balanced input on the rear of my 6500, what cable would I need?  Is this available from Heil? 

2. If I use the rear XLR connector, how would I break out PTT or would this mean having to use VOX?

Thanks in advance and very 73,

David G4NRT
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Larry da Ponte

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You would use a female XLR to male 1/4" TRS cable. Heil sells both a hand switch and foot pedal with RCA plug for the rear PTT jack on the 6500. I like the foot switch as it keeps my hands free.
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David G4NRT / Z21NRT

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Thank you Larry!

Your reply really confused me until I had a look at the rear panel of my 6500! I had assumed (from reading the Hardware Guide) that the balanced input was an XLR not a 6.3mm stereo jack! When I re-read it, I realised that the Hardware Guide doesn't cover my radio at all and I was looking at the 6700 panel!

All is now totally clear and I just need to identify the Heil cable for my rig and I'm all set!

Thanks again and very 73,

David G4NRT
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Larry da Ponte

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The balanced input on the back of the 6500 is a combo XLR & TRS jack. You could also use a cable with XLR on both ends.
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David G4NRT / Z21NRT

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Combo?  Well I'm darned!  Problem solved I think ... Just have to find a UK stockist who has the stuff in stock now ... Thanks again!
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Ken - NM9P, Employee

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For about $50 less than the PR-781 I got a Heil PR22UT which has a very similar response.  It isn't a "studio" looking mike, and probably doesn't have as much rejection off the backside, but it sounds great after EQ.  Definitely use the Balanced input.  All three Heils are nice mikes, as are many of the other ones mentioned here and in other posts.  Just understand that beyond a certain quality, hams arguing about mikes is about like country boys arguing about their pickup trucks.  They all get the job done and much of the rest is personal preference.  But do you really need a $50,000 pickup to haul cow manure?
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Mickey N4MB

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I considered both and chose the PR-40 because of the reputation for flatter audio, and my desire to use the mic for audio recording as well ham radio and I wanted to shape audio with the equalizer, not the mic. I also like the steel finish rather than black... very similar mic's.
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Thanks Guys I greatly appreciate all the input. I am sure this is just the beginning of my participation on this forum.

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Michael - N5TGL

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Love my EV RE320.  It has a kick drum setting if you feel your voice needs a bit more oompf on the bottom end...but I find that the mic does really well flat.  I even roll off the bottom a bit on mine.
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Since I have owned or tried Heil gold line , Traveler headset , Pro headset , PR40 ,RE27,SM7B , Audio Tech 2020.2035,2050,4033cl,4050,Neumann tlm 102,103 .

I prefer the 4033cl with any Preamp that will deliver Phantom power. (I am using a focusrite 2I2)
And I do also like the Yahama CM500 headset . (Fantastic ).

I would suggest that you take some time and listen to any of these fine mikes You Tube and try to compare this response to what your voice really sounds like.

Then make your choice.
And Yes it's only SSB but you can sound pretty good in this bandwidth if you try.