You can use the same types of dynamic mics that are used to internally mic a Cajun accordion. You don't need to have separate mics for the bass and treble side. It can be advantageous to use two mics to get a more uniform response across the high and low notes on the treble side, but I haven't tried that yet.

I originally installed a single Shure R-65 in my Guerrini triple row. This is more or less the standard mic used for Cajun accordions. I mounted it on a reed block in a similar way that they are mounted on a reed block on a Cajun accordion. It's a little tricky, because there is a lot less room inside the bellows, so you have to find the right spot.

I eventually replace the R-65 with a Shure SM-57 mic capsule. It has a somewhat stronger signal. But the capsule is quite large.

I am thinking of changing the setup once again and using two smaller mics in order to even out the coverage between the high and low notes. I am considering using Audio Technica D-LVX2 mics for this. They can be a little hard to find as they are no longer in production.

As part of the change, I am also going to wire it up using an XLR jack instead of the 1/4 inch phone jack it has now.

Thanks for the response David what did you wrap the capsule in and how was it at atached to the Reed block?
How is it for feedback?

Hey David,
Is this what im looking for?

http://www.bhphotovideo.com/c/product/68741-REG/Shure_R65_R65_Replacement_Cartridge.h
If so it looks like a good deal.

That looks like the one.

You know, I have a couple of those I am not using any more, and I would sell one for less than $75. It would include the mounting bracket and transformer attached.

Send me an email and we can discuss it more.

DavidSousa@verizon.net

The way that these are mounted on the reed blocks involve making a bracket with stiff wire which wraps around the mic and then gets screwed onto a reed block. Take a look at the website in Link #1 and you will see pictures of two different mic mounting systems in a Cajun accordion. Big Nick was switching from having it mounted in the usual way to an improved way. The first couple of pictures show how it started out, which is a commonly used way to do it.

http://www.bignick.net/BoxLessons/boxlesson_19.htm

It's a little different in a triple row, because there is less room inside the bellows.

Feedback is always a challenge. It is always worse on a triple row than on a cajun accordion.

-David

Hi David
I've sent you an email, in regards to purchase
cheers
Dan

alternate approach
i have 2 cheap mic elements [took the mics apart]
dynamic
in parallel
they are $5 karaoke mics originally

they point directly at treble reeds
nothing needed to pick bass up
they are attached to the treble block via a coathanger wire assembly
there is very little room for mics where they really need to be
because the bass side will hit them when the bellows are closed
mine has about 2mm to spare or less

they sound pretty good actually

wle