MusicTech MT-04N and Guerrini 72 Bass Accordion
MusicTech MT-04N and Guerrini 72 Bass Accordion

I’ve been using MusicTech accordion microphone systems since 1999 when my first Beltrami was built – both my Beltrami accordions have them and I think they are great, so I was happy to be asked to install the same system for a customer. Once fitted, the MusicTech accordion microphone system is easy to plug in to a desk or amp – you just need a guitar lead. They sound good and reject feedback well. (No I don’t work for the company!) You can see pictures of my Beltrami mics and the MusicTech MIDI wiring which is even more complex here.

Here is a quick video of the accordion microphone system once I had finished installing it, with effects too!

MusicTech MT-04N Inside Front Casing
MusicTech MT-04N Inside Front Casing

Over the years I’ve installed a lot of accordion bugs or accordion mics in my own accordions, but this is my first time installing an expensive MusicTech system in a customers accordion so I really wanted to get it right. Positioning the mics, potentiometers, jack socket and wiring was tricky because the Guerrini has a very close fitting front cover – I definitely did not want to drill any holes in the wrong place!

MusicTech MT-04N Close up
MusicTech MT-04N Close up

All the components for driving and mixing the mics are surface mounted making the circuit board very slim. The front cover, and bass end and bellows wire are all joined together with plugs and sockets so that you can separate them without having to do any soldering.

MusicTech MT-04N Inside the bass end
MusicTech MT-04N Inside the bass end

Soldering is required for installation since wires need to be threaded into the bellows space, and the socket soldered on. Any gaps where air can pass then need to be plugged – I used accordion wax.

MusicTech MT-04N Battery and Bass Microphone
MusicTech MT-04N Battery and Bass Microphone

The system comprises 4 Sennheiser condenser mic capsules, three across the front for the right hand and one on the bass side. Condensers need a power source and the battery lives in the bass side too. It needs changing every 6 months according to MusicTech, but I only change mine once a year and have never had a problem. I always use a good make of battery though. Also the system is switched on by plugging in a lead so I always unplug if I’m not using it for a while (I don’t mean during a gig. When I say “a while” I mean more than 3 hours!)

Wires Through Accordion Bellows
Wires Through Accordion Bellows

The above photo shows how to install wires through accordion bellows. I’ve used bellows tape stuck with Evo Stick. Bellows tape is the cloth tape used to finish the outside edges of accordion bellows folds.

Bellows Closed
Bellows Closed

With the bellows closed you can see how little room there is for the wires in this compactly built Guerrini.

Bellows Open
Bellows Open

But happily I have managed to arrange things so that the wire never catches on the reed blocks when you fan open the bottom of the bellows.

Guerrini 72 Bass with MusicTech MT-04N Installed
Guerrini 72 Bass with MusicTech MT-04N Installed

From the outside all you see is 2 knobs and a jack socket – actually in this picture you can only just see the knobs but I think that’s just how the light was.

Here are some links:

My repair page

MusicTech

The Accordion Shop

CGM where I get a lot of my spare parts