Owner's Manual

Primo
ported
and
sealed
enclosures
The
following
graphs
simulate
the
Ultimo
and
Ultimo
SC
subwoofers
optimal
performance
in
ported
and
sealed
enclosures.
These
guidelines will
enable
you
to
choose
the
best
option suited for
you.
Please
note: the
recommended
enclosure
sizes
specified
include
driver displacement.
Primo
B
Primo
10
Primo
12
SPL
vs. Freq
SPL
vs. Freq
SPL
vs. Freq
dB
dB
dB
6
6 6
0
/
0 0
~
/
~
-6
-
-6
-
-6
,
-12
If
-12
/ "\.
/
-12
[I
I
-18
rl
-18
I
-18
I
.A
-24
f
/
-24
u
I
-24
,
II
-30
f
A
~
-30
~
I I
-30
J
IT
-36
/
-36
'
"\.
-36
"
"\.
5Hz
/6
50
'
j00
5Hz
)0
50
100
'\..
5Hz
1P
50
100
\.
/
\
"\.
Ported
Sealed
Ported
Sealed
Ported
Sealed
FB
=36Hz
Q
=
0.707
VB
=
20
Lit
(0
.
71
eu
.ft)
Port= 0
2'
'
x7
.
5"
ion~
VB
=
17 Lit
(0.6
eu
.
ft)
(0 5.1x19.1
em
FB
=35Hz
VB
=
31
Lit
(1.1
eu
.ft)
Q
= 0.
84
Port
=0
3"x
11
.6" long
VB=
28
Lit
(1.0
cu
.ft)
(0 7.
5x29.5
em)
FB
=28Hz
VB
=
0
57
Lit
(2
.0 eu.ft)
Q = 0.
84
Port= 0
4"x18
.
2"
long
VB=
38
Lit
(1.35
cu
.ft)
(
0
10x46
em)
Connecting
the
Primo
subwoofer
The
Primo
subwoofers
may
be
connected
to your
amplifier
in
a variety of configurations,
as
suggested
below.
Series
connection ( 1-3
woofers)
Primo
2 ohm version
2 ohm
Load
4 ohm
Load
=:
@
-
(Qt~
Primo
4 ohm version
!~~~
=:
@
~~~d-
@
o-
Q
Tuning
recommendation
Parallel connection (2-4 woofers)
Primo
2 ohm version
Primo
4 ohm version
~~~d=
~@
t~',O~m
l
g::
~
@
~
@;@
l~~"d
I
~=
~
~@;@;@
Once
the proper
enclosure
has
been
constructed,
please
follow
these
tips to optimize the performance
of
your
new
Primo
subwoofer.
It
is
always
suggested
to consult
your Authorized
Morel
Dealer
for
more
specific guidance,
if
necessary.
1.
Set
your
gain
level
control
to
ensure
stable
amplifier
operation without distortion
or
saturation to
prevent
subwoofer
damage.
2.
Adjust
the
cut-off frequency
according
to the
enclosure
design
and
subwoofer specifications to
ensure
optimal
performance.
3.
Electronic acoustic corrective
filter$
(e.g.
equalizer)
are
not
required,
as
long
as
the
subwoofer
enclosure
is
designed
properly.
4.
After listening
to
the
subwoofer
you
may
choose
to invert
the
phase.
Inverting
the
phase
will
affect
the
acoustic
performance
of
the
subwoofer.
It
is
recommended
to
listen
in
both configurations
in
order to determine your
preferred
mode.
5.
Before
adjusting your
sound
system
further,
it
is
suggested
to
move
the subwoofer
enclosure
to different
locations
in
the
car
trunk.
Placing
the
enclosure
in
different
locations
may
provide
the
solution
you
seek.