User Manual

6
Monitor
Mounting Position
Treble
Tilt
Bass
Tilt
Bass
Roll-Off
Desktop
Flat anechoic
response
None None None None
Free standing in
a damped room
None -2 dB None None
Free standing in
a reverberant room
None -4 dB None None
Near field on
a reflective surface
None -2 dB None -4 dB
In a corner
None -4 dB -4 dB None
Table 1. Suggested Tone Control settings for some typical moni-
tor placement positions.
Figure 9. Switch Group 2
to “OFF” position. Measure or listen systematically through the
different combinations of settings to find the best frequency bal-
ance. See Table 1 for some typical settings.
Bass Roll-Off Control
Bass Roll-Off control (switches 1 and 2) attenuates its output
near the cut-off frequency. Attenuation levels of -2 dB (sw. 1
ON), -4 dB (sw. 2 ON) or -6 dB (both switches ON) can be se-
lected.
Bass Tilt Control
The Bass Tilt control switches (swiches 3 and 4) offer three at-
tenuation levels for the bass response below 800 Hz, usually
necessary when the monitors are placed near room boundaries.
The attenuation levels are -2 dB, -4 dB and -6 dB.
Desktop Low Frequency Control
The desktop low frequency control (switch 5) attenuates the bass
frequencies around 160 Hz by 4 dB. This feature is designed to
compensate for the boost often occurring at this frequency range
when the monitor is placed upon a meter bridge, table or similar
reflective surface.
Treble Tilt Control
Treble Tilt control (switches 6 and 7) allows adjusting the treble
response above 5 kHz by +2 dB, -2 dB or -4 dB, which can be
used for correcting an excessively bright or dull sounding system
or to compensate for high frequency level loss if the monitor is
placed behind a screen.
Functions On Switch Group 2
Stored / Manual Ctrl
“MANUAL CTRL” refers to controlling the monitor using the con-
trols on the monitor’s back panel. The “STORED” refers to using
settings stored inside the memory of the monitor. These settings
are made using the GLM and the GLM Control Network. There
is additional functionality compared to that offered by the room
response correction switches on the back panel.
AES/EBU CH
This selects the audio channel(s) available on the AES/EBU
cable to be reproduced by the monitor. Turning both switches on
reproduces the sum of the two channels on the AES/EBU cable.
Turning both switches off mutes the monitor. When two channels
are selected, 6 dB of attenuation is automatically applied to avoid
overloading the monitor.
If the AES/EBU cable is operated in dual-wire mode, the moni-
tor detects this situation automatically and the channel selection
switches have no effect.
Driver Mute
These two switches allow you to mute the treble driver (marking
“TW”) and bass driver (marking “WF”) independently. This may
be useful to diagnose if a transducer is faulty.
On the 8351A and 8260A the marking “TW” is replaced with
“COAX” and this switch mutes both the treble and midrange of
the coaxial driver unit.
System Lvl
These switches allow scaling down of the monitor output. The
signal sent to the “Thru” output connector is not affected. The
switches are additive, for example, “–30 dB” attenuation is
achieved by turning on the “–10 dB” and “–20 dB” switches. The
effect of these switches is combined with the effect of the rotary
level adjustment control. This results in total possible attenuation
of 42 dB, 30 dB by the system level switches and another 12 dB
by the rotary control.
Using the 7000 Series Analog Subwoofers
with SAM Monitors
Please follow the steps below to integrate an analog subwoofer
into a system of SAM monitors:
• Connect cables carrying analog audio to the 7000 Series
analogue subwoofer first.
• Connect the subwoofer outputs to the analog inputs of the
SAM monitors.
• Connect the GLM Control Network to the monitors.
• Make a System Setup in GLM. It will consist of only
monitors as this is all the network can see, so suitable
Rapid Cabling Presets are “Stereo Pair (Analog)” and “5.0
Surround System (Analog)”.