Reed designation question.

[Niknak]

I’m looking at the specs on 2 accordions:
One shows Reeds 4/5 LMMH
and
One shows Reeds 4/7 LMMH
I understand the 4’s represents the LMMH but I’m not sure what the 5 & 7 represents.

 

[Ventura]

the number of reedsets on the bass side is the second number

and

i have never in my life seen a 4/7 reed stradella accordion,
nor have i ever even heard of one in existence

4/5 is the overwhelming norm for a standard semi-pro
or professional box

4/4 3/4 2/4 are usually student models

there are some 4/6 pro models around, like the
AC line from Excelsior if i remember correctly,
and other higher end pro models

more than 5 reeds on the Bass, depending on the skill
of the manufacturer and design, can feel and can be
somewhat unbalanced and a chore to play for long periods

try before you buy !

 

[Niknak]

This is for Quint system converter accordions.

 

[tcabot]

That's a bit of a rubbish way to describe the bass end. You don't get a 7 voice bass, ever, afaik.
For quint, to allow L,M,LM voices, you do get a 7th bank of reeds that act as doublers for the converter mechanism.
So yes, 7 banks for high-end quint converter, but never 7 voices.

 

[Niknak]

Thanks for the clarification.