Figure 5. Installing the RAM2 amplifier
module to the optional RM2 rack mount
adapter.
Figure 4. Installing the metal support to
the RAM2 amplifier module for placement
on a solid aurface.
Check that the amplifier’s serial number
matches that of the AIC25 loudspeaker
enclosure which it will power. If the loud-
speaker enclosures are not yet installed,
make a note of which amplifier is connected
to each channel so you can find the correct
AIC25 loudspeaker cabinet for every ampli-
fier. Connect the 12 V remote control cables
and loudspeaker cables as described above
in chapter “Cabling”.
The RAM2 has two parallel 10 kOhm input
connectors: a balanced female XLR and an
unbalanced RCA. There is also a male XLR
connector that can be used for daisy-chain-
ing several systems together. For long cable
connection lengths (>10 m or >30 ft) a bal-
anced line connection is recommended as
it offers better immunity to external interfer-
ence. However, the RCA connection method
is more commonly available and usually
works as well for shorter connection lengths
in less electrically noisy environments. Do
not use both inputs at the same time. Consult
your Genelec dealer for the choice of signal
cables.
Space requirement for the
RAM2 amplifier
The dual 40 W power amplifiers of a RAM2
unit generate a considerable amount of heat
when used at full power. To avoid overheat-
ing, ensure that there is good airflow around
the amplifier and no external heat sources
close to it. We recommend installing the
RAM2 into a well ventilated equipment rack
using its dedicated RM2 rack mount kit which
allows airflow through the ventilation holes
on the bottom and top of the amplifier box.
The amplifier must always be installed in an
upright position, never flat on its side.
Sufficient cooling for the amplifier must be
arranged at all times. As a general rule, the
ambient temperature around the amplifier
must not exceed 35 degrees Celsius (95°F).
The ventilation openings on the amplifier
box must not be blocked and a free space of
1 U (=1.75" or 45 mm) must be left above the
amplifier when installed. This space must be
sufficiently ventilated to maintain the temper-
ature below the aforementioned maximum
level.
If the RAM2 amplifier is placed on a shelf
or other solid surface, the metal support pro-
vided with the amplifier must be attached to
the lower part of the amplifier front panel with
an M4 screw. This improves the stability of
the amplifier and provides sufficient clear-
ance for air circulation below the amplifier.
Mounting the RAM2 amplifier
to an equipment rack
We recommend that you use the Genelec
RM2 rack mount adapter when installing the
RAM2 amplifier in an equipment rack. Make
sure that the space above and below the
RAM2 is uncluttered and there is a space
of 100 mm (4”) or more behind the ampli-
fier. The space behind the amplifier must be
well ventilated. If the temperature inside the
rack is likely to rise close to RAM2’s maxi-
mum ambient temperature of 35° C (95° F),
we recommend installing ventilation fans to
ensure that the thermal protection is not acti-
vated prematurely.
Attach the RAM2 to the RM2 rack mount
with two M4 screws provided with the rack
mount kit. The screws go through the holes
on the front panel of the amplifier. Each RM2
can take eight RAM2 amplifiers. Blanking
plates are provided to cover empty spaces in
the rack if fewer RAM2’s are installed.
Setting the input sensitivity
The input sensitivity of each loudspeaker
can be made to match that of the decoder
or other source by use of the input sensitiv-
ity control on the amplifier’s front panel. A
small screwdriver is needed for the adjust-
ment. The manufacturer default setting for
this control is -6 dBu (fully clockwise) which
gives SPL of 100 dB @ 1 m with -6 dBu
input level. Note that to get the full output
level of 100 dB SPL per unit, an input level
of +4 dBu (1.22 V) is needed in this set-
ting. Most pre-amplifiers are capable of this
output level.
Setting the room response
controls
The acoustic response of the system may
have to be adjusted to match the acoustic
environment and personal taste. See Table
2 for suggested room response control set-
tings in differing acoustic environments. If the
sound is found subjectively too bright, set
‘TREBLE TILT’ to “ON” (-2 dB), if too bass
heavy, you can choose between three attenu-
ation levels (-2, -4 or -6 dB) by switching on
the corresponding ‘BASS TILT’ switch.
The "BASS ROLL-OFF" switch activates
an 85 Hz high-pass filter, which can be used
for matching the loudspeaker response to a
correspondingly low-pass filtered subwoofer.
The manufacturer default settings for all
controls are ‘All Off’ to give a flat response
in half space, i.e. when the loudspeaker
has been installed in a ceiling. Always start
adjustment by setting all switches to the
‘OFF’ position. The "BASS TILT" switches are
not cumulative. If more than one switch is set
to ‘ON’ the attenuation value is not accurate.
Using Autostart and Remote
Control functions
In daily use, the RAM2 amplifier can be
switched to Standby mode to save energy by
activating the signal sensing Autostart func-
tion or by using a 12 V trigger voltage from
the decoder. If the system is left unused for
several days, we recommend that you power
it down using the RAM2’s main power switch
or a central power switch if one has been
installed.
The Autostart function is activated by turn-
ing switch 2 (AUTOSTART) on the amplifier
front panel to “ON”. Autostart turns the ampli-
