& Grandinote's history
|I'm Massimiliano Magri, the inventor of
Magnetosolid® Technology and the Mach
For all my friends, my name is Max.
I was born in 1973;
I got the degree in electronic engineering in
but was in 1996 that I built my first audio
Naturally, this my first amp was by tubes:
It's very easy to get a good sound by the
Already for my first tube amplifier and for
all other tube amplifiers that I created, I
never purchased an output transformer:
I always designed and made by myself all my
My studies on the output transformers will be
the foundation for the Magnetosolid®
at the end of the last millennium I was very
happy for the sound of my
tube amps, but in my brain there was an only
<<why are the tube amps richer of sound
than solid state amps>>
know perfectly the physics of the tubes and
the solid state devices, so
I understood that the answer to my question
was in the circuits and not
in the devices!
In the year 2000 I started my research in my
the first amplifier with this technology was
born in 2002.
It's really a TRUE "tube amplifier schematic",
WITHOUT the tubes and INSIDE the solid state
His sound was so different from all other
His technology needs a proper name:
Magnetosolid is the union of MAGNETO and
MAGNETO is for ferromagnetic components, so
the output transformers.
SOLID is for solid state components.
The transformers are a consequence of our
schematics like the tube schematics.
In the practical, what did I?
I created solid state amplifiers with the rich
natural sound of the tube amps, but not only:
the frequency response of Magnetosolid® amps
are so bigger than tube amps.
The true plus is the damping factor:
our impedence output is very, very lower than
This produce a control in the bass frequencies
that tubes can't dream!!!
Other very important plus is in refinement of
- no capacitances between the stages (only
before output transistors);
- only two output transistors (simple
- no feedbacks;
- for every device we use a dedicated power
So we use a schematic like tube amp
schematics, but improved!
People thinks that tubes play better than
solid state components...
Really, tube amplifiers play better than
ordinary solid state amplifiers, only for
their schematics, not for the tubes.
It's very important to have a very high
quality output transformer.
My research has continued to improve this
I decided to test a special material to
produce the magnetical cores for the output
The cost of this special core is very, very
high, but his performances are incredible:
with the identical wires geometry, with this
core, the primary inductance is more than 10
times than ordinary core!
The damping factor is higher, the frequency
response is bigger (in low and in high
frequencies), the voices are more natural...
The only problem is the cost.
I duplicated the Grandinote products,
the Magnetosolid-VHP products were born:
Shinai & Essenza
Prestigio & Divina
Silva & Araldo
Futura & Demone
easy to think that the "true Magnetosolid" are
all products with power
outputs, because the origin of the name is
"Ferromagnetic" & "Solid
state", but like I wrote before, the output
transformer presence is
only a consequence of the "tube circuits".
Also our pre-amplifiers play like tube
pre-amplifiers, but they are solid state...
In other words, all Grandinote devices use
solid state components, but their sound is
rich and natural, like tube devices.
We find these qualities in our pre-amplifiers,
in our phono pre-amlpifier: Celio
and in our
For their qualities and their circuilts, all
our devices are Magnetosolid®.
In the last years I studied a new input
I started to use this circuit in the
So Genesi arrived.
I also used this technology in the integrated
amp and Supremo arrived.
Domino with these new input circuits is
Essenza with these new input circuit is
Divina with these new input circuit is Oltre.
Another step towards naturalness.
To realise these speakers was another
It's a lot of years that we tryed to get a
great sound from crossover-less speakers.
We have understood that the only way to get
this is to use drivers that don't exist...
We tested a lot of full-range and
always the sound was "nasal", annoying in the
These problems are caused by the high
frequencies brack-up of the drivers.
By the crossover, these brack-up are killed,
but the crossover also kills a lot of
Our solution is to use a "mechanical"
We optain this by a special treatment behind
the drivers membranes.
This treatment kills brack-up, without steal
Finally we have our drivers to use without
the best voice that I listened from speakers.
This treatment also modify drivers paramters,
expecially the Fs and the Qts.
We created drivers with low Fs and high Qts.
These parameters are not good for Bass reflex
much better the close box, for these
Also a dipolar configuration is very good for
We tested also the transmission line, but the
best performances arrived with another
Our solution is in the middle between bass
reflex and transmission line.
Our cabinet is like a tube, with a larg
This tube is too short for a transmission
line: it's another thing!
We call this solution "Semi Resonance Tube":
In this way, we have very deep, tight, fast
basses, very different that all other speakers
that I listened.
Now Grandinote has a lot of customers, in much
of the world.
We export our products in 26 countries.
All customers that try our sound don't change
This is the most important thing.
Today is 10th September of the year 2018.
I turned 45 two months ago.
I still have a lot of ideas... See you! Max
& Grandinote's history
|Grandinote di Magri
Massimiliano - Via Primo Maggio, 32 -
27042 Bressana Bottarone (PV)
tel. +39 0383 347588 -
P.IVA 02083730180 - C.F.