Krix Seismix 5 User Manual
Warning: it is recommended that the unit
is turned off at the mains power if being
left unattended for any extended periods.
is turned off at the mains power if being
left unattended for any extended periods.
Standby Mode
Krix have included an energy saving device
when the unit is in
Krix have included an energy saving device
when the unit is in
Standby mode, meaning
the Seismix draws a meagre 3 watts (costing
approximately AUD$5.00 for 1 year to run).
approximately AUD$5.00 for 1 year to run).
Symetrix Vent
The Seismix subwoofer enclosure features
Symetrix bass reflex venting, with the vent
exhibiting the same flare radius both internally
and externally. This lowers subwoofer distortion
and serves to reduce vent turbulence or
“chuffing” at high drive levels.
The Seismix subwoofer enclosure features
Symetrix bass reflex venting, with the vent
exhibiting the same flare radius both internally
and externally. This lowers subwoofer distortion
and serves to reduce vent turbulence or
“chuffing” at high drive levels.
Clipping Protection
There are several layers of protection in
the electronics of the Seismix to prevent
clipping damage.
There are several layers of protection in
the electronics of the Seismix to prevent
clipping damage.
Opto-compressor:
When faced with a signal
peak which is in excess of what the Seismix
can accurately reproduce, a compressor circuit
activates to reduce the level of the signal once
it passes the preset threshold. This permits the
Seismix to perform at high level with only a
mild reduction in the signal’s dynamic content.
can accurately reproduce, a compressor circuit
activates to reduce the level of the signal once
it passes the preset threshold. This permits the
Seismix to perform at high level with only a
mild reduction in the signal’s dynamic content.
Soft Limiter:
If severe overdriving of the
amplifier continues to place a strain on the
compressor circuit, a soft limiting circuit
activates. The soft limiter circuit monitors
the Seismix’s amplifier power supply voltage
and prevents a direct current (DC) signal from
reaching the bass driver, causing damage.
compressor circuit, a soft limiting circuit
activates. The soft limiter circuit monitors
the Seismix’s amplifier power supply voltage
and prevents a direct current (DC) signal from
reaching the bass driver, causing damage.
features
Automatic on / off circuit
Standby Mode
Symetrix Vent
Clipping protection
- Opto-compressor with fast attack
- Opto-compressor with fast attack
to prevent overload
- Soft limiting to prevent amplifier clipping
Multi-layered fault protection
- DC Detect Sensor
- Thermal Sensor
- Mains Fuse
- DC Detect Sensor
- Thermal Sensor
- Mains Fuse
Electronic filtering
- Earth lift switch to eliminate ground loops
- 2
- Earth lift switch to eliminate ground loops
- 2
nd
order low pass filter adjustable
from 60Hz to 150Hz
- Adjustable Hi / Lo gain setting
- 0°/180° phase switch
- Fixed 2
- 0°/180° phase switch
- Fixed 2
nd
order high pass filter to
reduce driver excursion below 30Hz
Independent adjustable gain control
Heavy duty, high efficiency long throw
paper cone drivers designed for high level
sound reinforcement
paper cone drivers designed for high level
sound reinforcement
High current low noise amplifier
Automatic On / Off Circuit
For the auto circuit function to operate, the
power switch on the back of the subwoofer
needs to be left on (and can be done so safely,
see figure 1). The
For the auto circuit function to operate, the
power switch on the back of the subwoofer
needs to be left on (and can be done so safely,
see figure 1). The
Auto Circuit monitors both
the speaker level or line level inputs and powers
the amplifier in the subwoofer. When a signal
is present the blue
the amplifier in the subwoofer. When a signal
is present the blue
Power / Standby LED at
the top of the rear panel will remain lit. When
a signal is not present, the power will remain
on for approximately 15 minutes and will then
automatically switch itself to standby mode.
In standby mode the blue
a signal is not present, the power will remain
on for approximately 15 minutes and will then
automatically switch itself to standby mode.
In standby mode the blue
Power / Standby
LED will flash.
Fault Protection
The mains fuse protects against any
major electrical faults or short circuits
and incorporates an inrush current limiter
to eliminate power surges when using the
main on / off switch. The Seismix uses an
ATMEL MEGA16
The mains fuse protects against any
major electrical faults or short circuits
and incorporates an inrush current limiter
to eliminate power surges when using the
main on / off switch. The Seismix uses an
ATMEL MEGA16
®
microcontroller which is
the integrated circuit responsible for the
advanced fault protection features of the
Seismix amplifier. A microcontroller is a small
single chip computer optimised for hardware
control that runs a program stored in flash
memory on the chip. The construction of
the Seismix amplifier utilises surface mount
technology (SMT), which results in a more
compact design, high resistance to mechanical
vibration and higher circuit performance. The
filter capacitor bank present in the Seismix
amplifier features many low Equivalent Series
Resistance (ESR) capacitors allowing lower
supply impedance and greater instantaneous
power delivery to the loudspeaker load.
advanced fault protection features of the
Seismix amplifier. A microcontroller is a small
single chip computer optimised for hardware
control that runs a program stored in flash
memory on the chip. The construction of
the Seismix amplifier utilises surface mount
technology (SMT), which results in a more
compact design, high resistance to mechanical
vibration and higher circuit performance. The
filter capacitor bank present in the Seismix
amplifier features many low Equivalent Series
Resistance (ESR) capacitors allowing lower
supply impedance and greater instantaneous
power delivery to the loudspeaker load.
DC Detect Sensor:
Clipping is severe square
wave distortion that contains a direct
current (DC) component often responsible
for loudspeaker damage. In the event of an
abnormal function the amplifier will not only
shut down, but all LED’s will flash. If this
happens turn the subwoofer off and contact
your nearest Krix retailer for further assistance.
current (DC) component often responsible
for loudspeaker damage. In the event of an
abnormal function the amplifier will not only
shut down, but all LED’s will flash. If this
happens turn the subwoofer off and contact
your nearest Krix retailer for further assistance.
Thermal Sensor:
The Seismix has a generously
sized heat sink, permitting normal operation
in high ambient temperatures. A thermal
sensor internally connected to the heat
sink is monitored every 20 seconds by the
microcontroller. In the unlikely event that
the amplifier’s temperature reaches above
65 degrees celsius the microcontroller
will reduce output by 1dB every 20 seconds
until the temperature is 65 degrees celsius
or below. The microcontroller will return
the amplifier to normal operating settings
by increasing the output by 1dB every
20 seconds.
in high ambient temperatures. A thermal
sensor internally connected to the heat
sink is monitored every 20 seconds by the
microcontroller. In the unlikely event that
the amplifier’s temperature reaches above
65 degrees celsius the microcontroller
will reduce output by 1dB every 20 seconds
until the temperature is 65 degrees celsius
or below. The microcontroller will return
the amplifier to normal operating settings
by increasing the output by 1dB every
20 seconds.