<s>
Marshall	O
is	O
a	O
British	O
company	O
that	O
designs	O
and	O
manufactures	O
music	O
amplifiers	O
,	O
speaker	O
cabinets	O
,	O
brands	O
personal	O
headphones	B-Device
and	O
earphones	O
,	O
drums	O
and	O
bongos	O
.	O
</s>
<s>
They	O
most	O
liked	O
the	O
sound	O
of	O
the	O
4×	O
10-inch	O
Fender	O
Bassman	O
and	O
made	O
several	O
prototypes	B-Application
using	O
the	O
Fender	O
Bassman	O
amplifier	O
as	O
a	O
model	O
.	O
</s>
<s>
The	O
sixth	O
prototype	B-Application
produced	O
,	O
in	O
Marshall	O
's	O
words	O
,	O
the	O
"	O
Marshall	O
Sound	O
"	O
,	O
although	O
at	O
this	O
time	O
the	O
only	O
involvement	O
Marshall	O
had	O
was	O
to	O
sell	O
the	O
amplifiers	O
on	O
a	O
commission	O
basis	O
in	O
his	O
shop	O
.	O
</s>
<s>
This	O
led	O
to	O
the	O
use	O
of	O
Dagnall	O
and	O
Drake-made	O
transformers	B-Algorithm
,	O
and	O
a	O
switch	O
to	O
the	O
KT66	O
valve	O
instead	O
of	O
the	O
6L6	O
tube	O
commonly	O
used	O
in	O
the	O
United	O
States	O
.	O
</s>
<s>
Ken	O
Bran	O
and	O
Dudley	O
Craven	O
,	O
Marshall	O
's	O
developers	O
,	O
doubled	O
the	O
number	O
of	O
output	O
valves	O
,	O
added	O
a	O
larger	O
power	O
transformer	B-Algorithm
and	O
an	O
extra	O
output	O
transformer	B-Algorithm
.	O
</s>
<s>
The	O
input	O
accommodates	O
both	O
active	O
and	O
passive	O
bass	O
pick-ups	O
;	O
there	O
is	O
also	O
an	O
XLR	B-Device
DI	O
output	O
for	O
recording	O
complete	O
with	O
Earth	O
(	O
grounding	O
)	O
lift	O
and	O
Pre/Post	O
EQ	O
switches	O
.	O
</s>
<s>
In	O
2010	O
Marshall	O
started	O
a	O
partnership	O
with	O
Zound	O
Industries	O
to	O
make	O
headphones	B-Device
and	O
bluetooth	O
speakers	O
,	O
Zound	O
Industries	O
is	O
most	O
known	O
for	O
its	O
Urbanears	O
headphones	B-Device
and	O
have	O
a	O
similar	O
partnership	O
with	O
Adidas	O
to	O
make	O
audio	O
products	O
for	O
them	O
.	O
</s>
<s>
In	O
August	O
2018	O
,	O
Marshall	O
announced	O
two	O
smart	B-Device
speakers	I-Device
which	O
run	O
Amazon	B-Application
Alexa	I-Application
.	O
</s>
<s>
They	O
agreed	O
and	O
six	O
rigs	O
of	O
this	O
prototype	B-Application
were	O
manufactured	O
,	O
of	O
which	O
two	O
each	O
were	O
given	O
to	O
Townshend	O
and	O
Entwistle	O
and	O
one	O
each	O
to	O
Ronnie	O
Lane	O
and	O
Steve	O
Marriott	O
of	O
The	O
Small	O
Faces	O
.	O
</s>
<s>
Entwistle	O
and	O
Townshend	O
both	O
continued	O
expanding	O
and	O
experimenting	O
with	O
their	O
rigs	O
,	O
until	O
(	O
at	O
a	O
time	O
when	O
most	O
bands	O
still	O
used	O
50	O
–	O
100W	O
amplifiers	O
with	O
single	O
cabinets	O
)	O
they	O
were	O
both	O
using	O
twin	O
stacks	O
,	O
with	O
each	O
stack	O
powered	O
by	O
new	O
experimental	O
prototype	B-Application
200	O
W	O
amplifiers	O
,	O
each	O
connected	O
to	O
the	O
guitar	O
via	O
a	O
Y-splitter	O
.	O
</s>
<s>
Artists	O
such	O
as	O
Slayer	B-Application
and	O
Yngwie	O
Malmsteen	O
also	O
use	O
walls	O
of	O
Marshalls	O
;	O
both	O
Kerry	O
King	O
and	O
Jeff	O
Hanneman	O
of	O
Slayer	B-Application
would	O
often	O
be	O
seen	O
playing	O
in	O
front	O
of	O
a	O
total	O
of	O
24	O
cabinets	O
.	O
</s>
