NHT A-10 Owner's Manual page 5

USING THE A-10 CONTROL FUNCTIONS:
The A-10 controls are designed for utility and repeatability under varying conditions. You should find the effects of the
controls sonically subtle, with little impact on the basic character and accuracy of the speaker.
experimentation to fine tune the system to the requirements of your particular installation.
+4
+11 -3
M -10
SENSITIVITY
POWER INDICATORS: Just to the left of the power switch on the A-10 Control Amplifier are two power related
LED's. The upper (green) LED lights up indicating there is AC power to the amplifier and the POWER SWITCH is in
the "on"position. The lower (red) LED indicates a clipping or overload condition. Occasional flashing of this indicator
is a gentle warning you are reaching the system's limits. If the red LED glows continually, severe clipping is occurring.
The input signal or system gain should be reduced to avoid the risk of possible system damage.
SENSITIVITY: This control is used to change the input sensitivity with settings at; -10dB, -3dB, +4dB, +11dB and
(M)ute providing noise free, consistent gain matching with a wide variety of equipment. The proper setting is the lowest
sensitivity possible (highest dB number) which allows the speaker to reach the maximum desired output without source
clipping. Professional devices typically spec full output at +4dB, most consumer audio products reach full output at -
3dB, and most computer sound cards have a full scale output of -10dB. Consult the owner's manual for the device
connected to the Control Amplifier for its output level specifications and set the SENSITIVITY switch accordingly.
BOUNDARY CONTROL:
frequency output. Conversely, placing speakers out into a room decreases bass response. The greatest low frequency
output is with the BOUNDARY control in the "0"position, which assumes no significant boundary reinforcement is
present. The control attenuates low frequencies by 3 dB (at 50 Hz), with rapidly decreasing effect above 300 Hz. Refer
to the diagram in Fig. 6 for information on setting the control appropriately.
0 MF
1 NF
POSITION
BOUNDARY
Fig. 5 A-10 Control Amplifier Front Panel
Reflective boundaries, such as floors, walls, even table tops, reinforce a speaker's low
Whole Space
0
1
BOUNDARY
Fig. 6: Boundary Control Settings Diagram
A-10 Control
Amplifier
Half Space
0
1
BOUNDARY
We encourage
POWER