Krix Seismix 3 Subwoofer
Contents
1. high level speaker input 7 darn oe dangerous voltage voltage high level speaker gutput Speaker Level Input Qutputs Figure 3 Connection using Speaker Level signal To main stereo speakers t Mains Power Switch serial no high level speakerjinput Main Stereo Amplifier aes connection ie Ensure the main power switch is off and connect the mains power cord There are two methods which you can use to connect the Seismix subwoofer either via the line level inputs which will require your stereo amplifier AV receiver to have a subwoofer output facility mono or stereo outputs or via the speaker level inputs Method 1 Line Level Connections It is recommended that you use Line Level connections for home theatre applications Connect the SUB OUT socket s on your AV receiver to the Line Level input s which are a pair of RCA sockets located in the middle of the rear subwoofer panel see figure 1 The SUB OUT socket on your AV receiver is usually mono which can be connected to the Seismix with one lead to the Left mono input If your AV receiver has stereo SUB OUT sockets then use dual leads connecting these to the Left and Right inputs Refer to figure 2 for connection using Line Level signal Method 2 Speaker Level Connections For stereo applications connect the Speaker Level outputs on your main amplifier to the Speaker Level inputs on the rear panel of the S2. Signal connection Subwoofer Figure 5 Phase Negative going Receiver Amplifier InPhase o No output 180 out ofph se To get the most from all of your speakers they must be operating in Phase That is the signals must all be positive going or negative going simultaneously If this is not the case and one signal is positive going and the other is negative going the result will be a cancellation of signal and the sound at those particular frequencies will be perceived as quite empty sounding and lacking potential impact The setting of the Phase button ie 0 or 180 and the resulting sound is dependant on where the subwoofer is positioned in relation to the main speakers The best way to find the correct setting is through trial and error during set up by comparative listening tests In most cases the effect will be subtle and there won t be a complete lack of bass If no difference can be heard the position of the button is not crucial The effect of phase can best be shown with the representation of a sine wave see figure 5 The effect shown in the lower diagram is with the signals out of phase and this can be rectified by changing the position of the Phase button This will invert the negative going signal and the result will be the same as he first In Phase example Line Level Inputs Line level inputs see figure 1 or 2 need to be connected to the PRE OUT
3. Symptom Probable Cause Treatment No noise from the subwoofer when main power is on Auto switch circuit has not operated due to no signal Play source material and gradually increase the volume rom the main Hi fi amplifier Volume turned down ncrease Volume on the sub Signal has no bass content Play source material with sufficient bass content Very little bass coming from the subwoofer Apart from the source material having little bass content the settings on the sub may need adjustment ncrease setting of the Low Pass Hz control Try changing position of he Phase button ncrease Volume on the sub Change gain button from Lo to Hi Bass content is too strong and uncomfortable to listen to Settings on the subwoofer may need adjustment Decrease the setting of he Low Pass Hz control Decrease the Volume on he subwoofer Subwoofer emits a humming sound Current may be circulating from the subwoofer s signal ground through the mains earth wiring Activate the Earth Lift by pushing the button which will break the current loop If you have any queries regarding the Seismix the set up procedure or any other KRIX product please contact your nearest Krix retailer or Krix direct Contact details are on the back cover of this booklet warranty 5 years warranty applies to the cabinet and speaker 1 year warranty applies to the amplifier and related
4. or SUB OUT from your stereo amplifier AV receiver The line level stereo input performs a summing function adding the left and right signals where applicable to give a mono L R signal This mono signal is filtered and then amplified before being sent to the subwoofer driver Speaker Level Inputs The speaker level stereo inputs combine the signal going to the main left and right speakers providing a mono L R signal to the subwoofer driver This mono signal is filtered and then amplified in the same way as the line level input signal before being sent to the loudspeaker Two pairs of terminals are provided so that the speaker level signals can pass through the subwoofer on the way to the main speakers see figure 1 or 3 Volume The volume control will adjust the volume of the subwoofer only The control can be set for the subtleties of the lower octaves n musical performances or increased for the earth shattering explosions and effects on movie sound tracks The volume control on your main amplifier AV receiver controls volume for your overall system see figure 1 positioning The procedure for setting up any subwoofer can be time consuming requiring numerous minor adjustments to get the desired result There is no definitive correct way to set up a subwoofer Given different listening environments different people s tastes and different speakers there are a number of variables that h
5. gt 70dB Distortion Input to Speaker lt 0 1 80 watts RMS Line Level Inputs Left Input mono Lo 900mV RMS for maximum output Hi 100mV RMS Left Right Input stereo Lo 45OmV RMS for maximum output Hi 50mV RMS General Frequency Range 16Hz 150Hz 6dB in room response Output 122dB maximum SPL in room response Auto Power On Off 15 minute delay before switching to standby after no input signal Phase Select 0 or 180 relative to input signal Cabinet Enclosure Type Bass reflex front vented Dimensions 460mm high x 395mm wide x 440mm deep aterial 19mm and 25mm MDF Finish Vinyl or lacquered timber veneer Weight 30kg Due to continued development specifications may change without notice Krix Loudspeakers Pty Ltd 14 Chapman Road Hackham SA 5163 Australia T 61 8 8384 3433 F 61 8 8384 3419 listen krix com krix com
6. 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 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 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 Power Standby LED will flash Warning it is recommended that the unit 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 Standby mode meaning the Seismix draws a meagre 3 watts costing 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 Clipping Protection 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 compress
7. ave to be taken into consideration It is up to the individual listener to adjust the Seismix for the character and strength of bass that is preferred for whatever type of source material is being reproduced is beneficial to select music that is familiar to you when carrying out listening tests and setting up procedures and as a suggestion play recordings that use wooden instruments such as acoustic guitars oboes cello etc These instruments exhibit a strong resonant characteristic in the low to mid bass region and will highlight unpleasant woody or chesty sound qualities suggesting there is too much overlap in the bass information between the subwoofer and main speakers To fine tune the integration of the Seismix into your Hi fi system start with both the Low Pass Hz and Volume at the middle setting Gradually adjust the setting of the Low Pass Hz either up or down see figure 1 This will vary the amount of overlap from the sub to the main speakers and increase or decrease the level at those frequencies The effect is a strengthening or weakening of the upper bass region You might reach a point where the sound develops a boxy or chesty quality which is not desirable This could indicate there is too much overlap from the sub to the main speakers and is remedied by turning the Low Pass Hz back Adjust the Volume level to suit your personal taste trouble shooting
8. eismix see figure 1 Then connect the Speaker Level outputs on the rear panel of the Seismix to each of your left and right speakers Be sure to maintain correct phasing for each set of speaker leads red positive to and black negative to Refer to figure 3 for connection using Speaker Level signal Before turning the Seismix on ensure the volume control is turned down and set the Low Pass Hz control to the middle position see figure 1 Turn on the unit with the power switch located at the bottom of the rear panel the subwoofer will activate and the blue Power Standby LED will light up Begin by playing music with bass content and slowly increase the volume dial on the subwoofer to a moderate level features Automatic on off circuit Standby Mode Symetrix Vent Clipping protection Opto compressor with fast attack o prevent overload Soft limiting to prevent amplifier clipping Multi layered fault protection DC Detect Sensor Thermal Sensor ains Fuse Electronic filtering Earth lift switch to eliminate ground loops 2 order low pass filter adjustable from 60Hz to 150Hz Adjustable Hi Lo gain setting 0 180 phase switch Fixed 2 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 High current
9. experience sound Owner s Manual Seismix 3 and Seismix 5 E o Ol o o Congratulations on choosing Krix The Seismix 3 and Seismix 5 active subwoofers will complement existing Stereo or Home Theatre systems producing an increase in low frequency performance for a deep experience The Seismix 3 and Seismix 5 are compatible with a variety of small to large sized sealed or vented main satellite speakers Your subwoofer contains an amplifier of the highest electronic standards Krix have introduced In Circuit Serial Programming ICSP meaning the microcontroller within the amplifier can be upgraded via the serial interface located internally on the amplifier module This means as future features are developed your subwoofer can be upgraded You would simply need to return the amplifier module to Krix where the upgrade would take place Figure 1 Back panel of subwoofer Figure 2 Connection using Line Level signal To main stereo speakers krix com KI x Main AV Receiver experience sound power e SEISMIX Ie j From pre _ HESR gain eo Volume Control or sub out hi A volume o URES a ea alls phase earth lift line in Low Pass Control 180 HOES ra right earth lift line in Line Level Inputs If only a single or mono sub out exists then plug th t into the left g high level speaker output gt amp Line Level input labelled mono left right
10. gainst electric shock NEVER disconnect the mains earth from any appliance Low Pass Hz The Low Pass control see figure 1 adjusts the total bass content from the Seismix This control allows you to adjust the upper limit of the Seismix s frequency range between 60 150 Hz The higher the selection the broader the range of bass information heard This setting can be adjusted for personal taste and integration with your main speakers Figure 4 Earth lift button Mains power outlets CU Circulating ground currents a arth lift button Hi Lo Gain The Hi Lo Gain button see figure 1 is positioned below the blue Power Standby LED this button allows you to increase or decrease the sensitivity of the subwoofer without adjusting other settings In the Lo gain position a much higher input signal is required and you will need to increase the main volume control to reach maximum output In the Hi gain position the output of the subwoofer is increased by approximately 20cB requiring a lower input signal meaning you will not need to increase the main volume control to achieve the same amount of output Phase Signal phase can be left at 0 or shifted 180 inverted by pressing the Phase button see figure 1 This applies to the output of the subwoofer compared to its input ITR Denotes chassis Earth Denotes signal ground
11. internal electronics Refer to the details on the warranty card supplied Seismix 3 specifications Drivers Bass Driver Nominal 255mm 10 diameter paper cone driver developed for high level low frequency reinforcement Electronics Amplifier Power 200 watts RMS into the nominal 4 ohm driver Maximum instantaneous power 400 watts Amplifier S N gt 70dB Distortion Input to Speaker lt 0 1 80 watts RMS Line Level Inputs Left Input mono Lo 900mV RMS for maximum output Hi 100mV RMS Left Right Input stereo Lo 45OmV RMS for maximum output Hi 50mV RMS General Frequency Range 22Hz 150Hz 6dB in room response Output 120dB maximum SPL in room response Auto Power On Off 15 minute delay before switching to standby after no input signal Phase Select 0 or 180 relative to input signal Cabinet Enclosure Type Bass reflex front vented Dimensions 415mm high x 360mm wide x 390mm deep aterial 17mm MDF Finish Vinyl or lacquered timber veneer Weight 18kg Due to continued development specifications may change without notice Seismix 5 specifications Drivers Bass Driver Nominal 305mm 12 diameter paper cone driver developed for high level low frequency reinforcement and large linear cone travel Electronics Amplifier Power 400 watts RMS into the nominal 4 ohm driver Maximum instantaneous power 800 watts Amplifier S N
12. lipping 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 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 Earth Lift The Earth Lift button ensures the Seismix can be connected to a wide range of stereo amplifiers AV receivers Should a humming noise be evident when the Seismix is connected push the Earth Lift button see figure 1 which interrupts the current that may be circulating from the subwoofer s signal ground through the mains earth wiring see figure 4 Note The Earth Lift button does not break the mains earth connection to the subwoofer only the connection between the subwoofer s signal ground and the mains earth To guard a
13. or 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 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 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 DC Detect Sensor C
Download Pdf Manuals
Related Search