Mengascini Eureka 1 – Converter accordion

£3,552.00 inc. VAT

The Mengascini Eureka 1 chromatic button accordion with free bass converter. It is available in B or C system layout. This accordion would make a great first converter for a child or an adult. See below for further information.


Mengascini Eureka 1


37 note – 72 bass / 37 note free bass converter


The Mengascini Eureka 1 converter is hand built by highly skilled craftsmen in Castelfidardo, Italy by Mengascini and is fitted with good quality Italian reeds. This small and lightweight chromatic button accordion would make a good option for your first converter accordion and is particularly suited to small children due to it’s size.


It is available in either B or C system layout and is highly customisable.


If you would like any more information about this accordion please contact us for more information.


What's the left hand side got?

The Mengascini Eureka 1 is a free bass converter accordion and has 72 “bass” buttons on the left hand keyboard. The left hand keyboard “converts” between Standard bass and free bass by pressing a switch on the left hand keyboard.


The standard bass keyboard has 72 “bass” buttons and has 6 rows of buttons with 2 rows of bass notes (Fundamental and Counterbass rows) and 4 rows of preset chords (Major, minor, seventh and diminished chords). The 2 rows of bass notes use 3 voices and there are no register switches. The chord rows use one voice.
The free bass keyboard maintains the 2 rows of bass notes while “converting” the 4 chord rows into 37 seperate free bass notes spread over the 4 rows. The Eureka 1 has 1 voice for the free bass.

What's the right hand side got?

The Mengascini Eureka 1 is a 4 row converter accordion and has 46 button keys spread over the 4 rows it is available with the C system or B system (Russian bayan) layout and there are 37 seperate notes available. This accordion has 1 voice on the right hand side. It has no registers.

How big is this accordion?

This free bass converter accordion / bayan weighs 4kg. It has a height of 32cm,  and a width of 20.5cm.

Free the Reed accordion dimensions diagram

Accordion dimensions diagram

These measurements are taken with the bayan / accordion in an upright “playing position” as in the diagram.


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