One Systems POPS SUBa - Manual (Page 16)

POPS Sub Gain
EQUALIZATION
The POPSSub has all the required equalization functions included in its
amplifier’s circuity. The equalization functions have been optimized for flat
frequency response and maximized system dynamics. POPSSub does not have
user-adjustable external EQ.
The mixing console should be capable of providing sufficient output signal levels
to supply the necessary voltage levels to drive the POPS15 and POPSSub to full
power and still insure adequate headroom. The mixing console should be
capable of driving 100 feet (30.5 m) of balanced cable as well as the POPS15.
If additional equalization is required, care should be taken to avoid excessive EQ
in any band, but particularly at low frequencies. Excessive equalization can
produce “band selective” clipping and distortion. All EQ boost levels should be
monitored if system distortion is present.
DISTORTED SOUND
When input levels to the POPSSub exceed the amplifier’s gain capability, internal
dynamics processing functions will engage and provide system protection.
However, it is still possible to “overdrive” the input section of the enclosure. If
distorted sound is present the following steps should be taken:
1. Verify that the mixer’s output is not clipping or overloaded. If the output
metering section of the mixing console is continuously in the “red” then the output
level should be reduced. (occasional “red” indications are usually fine and are
dependent on the mixing console output capability).
2. Verify that excessive equalization is not present anywhere in the signal chain.