Quested SB10, User Manual, Page: 8 / 16

8
Source Unbalanced Phono 2 Core cable
5 OPERATIONAL CONSIDERATIONS
5.1 Mains O n- Off Switching and Level
A rocker switch on the front panel provides On-Off switching. When powering up an audio
system it is good practice to start at the source e.g. 1
st
outboard equipment, 2
nd
mixer, 3
rd
SB10 , 4
th
left and right monitors. When powering down the reverse order should be adopted.
5.2 Front Panel Indicators/Controls
5.3 Test
The test function is used to set the system up. It sends band limited pink noise to both the
sub bass out put and the full range monitors. A green LED indicates that the test signal is on.
5.4 Crossover Frequency
To allow you to accurately match the SB 10 to different monitors, different environments
and
different monitoring requirements the SB controller has adjustable crossover points. These
can be adjusted with the recessed pot in the front panel by using a flat bladed screwdriver.
The crossover point is sweepable between 40 and 135 Hz. It controls the frequency the high
pass filters that supply the full range monitors and the low pass filter that supplies the sub
bass cross over.
5.5 Bypass
This mutes the sub bass output and bypasses the crossover filters that are on the full range
monitor out puts. This can be used as a monitoring function, as it allows you to easily switch
between a 2 and 3-way monitoring set up. There is a green LED that indicates when the
SB10 is bypassed.
5.6 Gain
The sub bass amplifier gain can be adjusted with the recessed pot in the front panel by
using a flat bladed screwdriver. This has a range of 20 dBu. With 0 dBu input on 1 channel
and the gain pot set to 0 the amplifier will give 2 dBu below maximum output. This allows
you to accurately set the output level of the sub bass. 4 LEDs –18, -12, -6 and 0 dbB
indicate the level of the sub bass. The 0db LED indicates that the amplifier is 1 dB below
clip.
5.7 Phase
This controls the phase of the sub bass and is used on installation to accurately match the
sub bass with both the full range monitors and the environment they are being used in. It can
be adjusted between 0 and 180 degrees with the recessed pot in the front panel by using a
flat bladed screwdriver.