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Page 20

XO1 Operators Manual

High and Low Pass Filter Screens

To adjust HPF/LPF settings:

Use the ‘FREQ’ control for the frequency.

Use the ‘Q’ control for the slope.

Each output has an independent high pass filter and an independent low pass filter.
Both filters have a range of selectable slopes, which are Bessel 12dB, 18dB and 24dB,
Butterworth 12dB, 18dB and 24dB, and Linkwitz-Riley 24dB.
Highpass filters have a range of <10Hz (through) to 16kHz and Lowpass filters have a
range of 22kHz (through) to 39Hz in 1/36 octave steps.
HPFs and LPFs can be set asymmetrically.

For further details on this topic, see the section entitled
“Crossover Filter Slopes” on page 32.

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Содержание XO-1

Страница 1: ...XO 1 Users Manual ...

Страница 2: ...r settings Also used for design of new crossovers Security Sub menu Used for locking various features of the units using a four digit code System Sub menu Used to view the units status and select various global options such as parametric EQ Q or bandwidth units and output meter monitoring point pre or post mute Notes The crossover and output settings are stored and recalled independently using sto...

Страница 3: ...2 x 3 way 12 4 way 2 13 5 way 1 14 6 way 15 Screen Layouts Overview 16 Gain Screen 17 Polarity Screen 18 Delay Screen 19 High and Low Pass Filter Screens 20 Parametric Equaliser Screen 21 Limiter Screen 22 Menu Selection 23 Input Setup Sub menu 24 Gang Inputs 24 X over Sub Menu 25 Load a Xover 25 Design a Xover 25 Store a Xover 25 Erase a Xover Mem 25 Security Sub Menu 26 User Specific 26 Xover On...

Страница 4: ...enu 30 Routing Options 30 AES Diagnostics 30 AES EBU Connections 30 Operating Notes 31 Operating Level 31 Grounding 31 Crossover Filter Slopes 32 Time Alignment 32 Output Limiters 33 Setting Accurate Limiter Thresholds 34 Specifications 36 Warranty 37 Options and Accessories 37 Appendices 38 Appendix 1 Limiter threshold in dB to Vrms lookup table 38 Appendix 2 Default X over settings and names for...

Страница 5: ...DE CHOC ELECTRIQUE NE PAS ENLEVER NE PAS EXPOSER A LA PLUIE NI A L HUMITE It should not be necessary to remove any protective earth or signal cable shield connections Do not defeat the purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wider blade and the third prong are ...

Страница 6: ...ngineered for cutting edge performance and world class reliability If you would like further information about this or any other product please contact us We look forward to hearing from you in the near future Unpacking the XO1 After unpacking the unit please check it carefully for any damage If any is found immediately notify the carrier concerned you the consignee must instigate any claim Please...

Страница 7: ...easy to use interface Features Superb audio quality carefully optimised double precision signal processing coupled with a 40 bit internal data path ensures a dynamic range in excess of 110dB The high sampling rate means minimal filtering providing exceptional sonic purity A flexible 2 input 6 output multi mode format caters for any crossover configuration regardless of scale A total of 30 parametr...

Страница 8: ...ric crossover bands to be created Delay of up to 650mS may be independently set for each output with an exceptionally fine minimum increment of 2 6µS Three velocity sensitive encoders provide a familiar and intuitive control format with all filter information displayed simultaneously on a backlit LCD screen AES EBU Digital input and output interfaces are available as an option Input and output bal...

Страница 9: ...enu Encoders three velocity sensitive controls allow the relative parameter displayed on the LCD screen to be adjusted PC Card PCMCIA card slot allows back up of input memory sets unit cloning data and facilitates the download of software updates SELECT Keys one for each input and output allowing instant access to the gain screen for the selected channel The accompanying LED illuminates whilst edi...

Страница 10: ...located in this holder Mains Inlet connected via a standard IEC socket External RS232 standard via a 9 pin D type connector for connection to a PC enabling the uploading of new software to the unit Audio In Out 3 pin XLR sockets are provided for each channel All are fully balanced pin 2 hot 3 cold 1 screen Always replace the fuse with the correct type and rating as shown on the rear panel legend ...

Страница 11: ...u ENTER is always used to confirm selections The current selection is marked with an asterisk Use the SELECT keys on each output channel with the BACK and NEXT keys to select the high pass filters low pass filters parametrics etc Note that when designing a new crossover the high and low pass filters will be set to default values See appendix 2 for more information Use the SELECT keys on each input...

Страница 12: ...ow each of the five modes is internally configured Note that the 2 x 3 way and 3 x 2 way modes also offer the option of ganged parameter adjustment for stereo systems 2 x 2 way with Mono Sum This format feeds input A to outputs 1 and 2 designated low and high respectively Input B feeds outputs 3 and 4 low and high respectively Outputs 5 and 6 are both fed from the sum of inputs A and B Output 6 is...

Страница 13: ...spectively Input B feeds outputs 4 5 and 6 as low mid and high respectively Note that this configuration as with the 2 x 2 way can have the outputs ganged for stereo operation This gangs outputs 1 4 2 5 and 3 6 so that they track identically It can be selected or modified by entering the Design a Xover function again ...

Страница 14: ...e 13 4 way 2 This format feeds input A to outputs 1 2 3 and 4 designated low lo mid hi mid and high respectively Outputs 5 and 6 are configured as auxiliaries with their source being either input B or the sum or inputs A and B ...

Страница 15: ...anual 5 way 1 This format feeds input A to outputs 1 2 3 4 and 5 designated sub low lo mid hi mid and high respectively Output 6 is configured as an auxiliary with the source being either input B or the sum or inputs A and B ...

Страница 16: ...XO1 Operators Manual Page 15 6 way This format feeds input A to all outputs designated lo sub through high 1 to 6 respectively ...

Страница 17: ...Page 16 XO1 Operators Manual Screen Layouts Overview ...

Страница 18: ...GAIN control Each input and output has an individual gain screen The inputs have a range of 6dB to 40dB adjustable in 0 1dB steps and the outputs have a range of 15dB to 40dB again adjustable in 0 1dB steps For further details on this topic see the section entitled Operating Level on page 31 ...

Страница 19: ...the polarity Use the GAIN control to switch between and Each output has an independent polarity screen This gives the flexibility to reverse flip by 180q the phase of individual outputs Note When the outputs are ganged the polarity screens remain individual ...

Страница 20: ... complete control over driver time alignment The combination of input base delay and output delay can be a maximum of 650mS So for example setting a base delay of 500mS on input A will only leave 150mS for any outputs that are sourced from input A The exception to this rule is for any aux outputs available in 4 and 5 way crossover modes Choosing the source as a mono sum Inputs A B will allow 650mS...

Страница 21: ...ent low pass filter Both filters have a range of selectable slopes which are Bessel 12dB 18dB and 24dB Butterworth 12dB 18dB and 24dB and Linkwitz Riley 24dB Highpass filters have a range of 10Hz through to 16kHz and Lowpass filters have a range of 22kHz through to 39Hz in 1 36 octave steps HPFs and LPFs can be set asymmetrically For further details on this topic see the section entitled Crossover...

Страница 22: ...um Q of 128 can be achieved and unlike analogue filters these tight Q filters are entirely stable The maximum notch depth is 30dB Parametric filters are carefully implemented using Double Precision processing This method is costly in terms of processing power but yields substantial benefits in terms of the XO1 s exceptional noise performance and greatly improved low frequency stability Note To sho...

Страница 23: ...nd 32 times the attack time and thresholds range from 22dB to 10dB in 1dB steps If the automatic limiter time constant option is in use all limiter screens will say automatic and the time constants will be set from the high pass filter frequency A table of dB to Vrms in case the amplifier sensitivity is given in Volts rather than dB is in appendix 1 The output meters are linked to the time constan...

Страница 24: ...Y UNDERSTOOD THE WAY THE LOCK OUT WORKS AS DESCRIBED ON PAGE 26 System Sub menu System Status displays unit info such as version internal temperature LCD Contrast adjusts the contrast of the LCD screen LED Brightness adjusts the brightness of all indicator LEDs Temperature Alarm sets a temperature warning threshold in C Wake up Time sets time take for unit to pass audio after power up Output Meter...

Страница 25: ...ecise adjustments can be made to both inputs simultaneously the LCD will show A B All adjustments are now absolute and any adjusted parameters on both channels will become identical If it is necessary to introduce an off set on any parameter un gang the inputs and adjust If re ganged channel B will jump to channel A s setting ...

Страница 26: ... N o Gang Outputs Yes N o Out 6 Source A A B Out 6 Source A A B Auto Limit TC Yes No Auto Limit TC Yes No Auto Limit TC Yes No Auto Limit TC Yes No Auto Limit TC Yes No Store a Xover Stores a X over all output settings to one of 9 locations Crossovers can be named using the same method as memories with up to 16 characters which appear in the default screen on the top line of the display Erase a Xo...

Страница 27: ...e ability to operate mutes store or recall memories or even access the menus may also be locked Xover Only All input parameters are available but only the gain trim is available on the outputs effectively locking all the crossover settings All mutes remain active Xover Trim All input parameters available but no output parameters the crossover sections are completely locked All mutes remain active ...

Страница 28: ...ntrol to select a character and the BACK and NEXT keys to move to the next character Alternatively the SELECT keys can be used to enter a code by pressing any combination of the eight buttons Each SELECT key represents its channel labelling so any combination of A B 1 2 3 4 5 and 6 can be used as a code as shown below IMPORTANT Please note your code If the security code number is forgotten contact...

Страница 29: ...fied temperature is reached N B the warning does not affect the units performance in any respect Wake up Time Sets how the unit starts up with one of the following options 0 to 60 seconds Waits the specified time before unit wakes up Mute hold Turns on and holds all output mutes when turned on N B Wake up is a slow ramp in level for about 5 seconds Output Meters Selects whether the output meters a...

Страница 30: ...nterface Sub Menu Interface Setup If the interface is enabled the option will become available to select the baud rate This must be set to match that on the PC to be used for the program update Typically the set up would be as below ...

Страница 31: ...gital signal AES EBU Connections The AES EBU digital signal is a stereo data stream and so only one input XLR and three output XLRs are used for the digital interface The connections are as follows Input A Analogue Input at all times Input B Switchable between digital stereo input and analogue input Output 1 Switchable between digital out for channels 1 2 and analogue out 1 Output 2 Switchable bet...

Страница 32: ...r that option not a safe operating level Always ensure that this clipping point is no lower than that for the following equipment in the signal chain and allow extra margin if equalisation sections are boosted Grounding The Screen shield pins on all audio connectors are normally connected directly to the ground pin of the IEC mains inlet The chassis is also directly connected to this pin Never ope...

Страница 33: ...losest available frequency on the XO1 s display Filter Type High pass factors Low pass factors Bessel 12dB Oct 1 45 0 69 Butterworth 12dB Oct 1 31 0 76 Bessel 18dB Oct 1 37 0 73 Butterworth 18dB Oct 1 19 0 84 Bessel 24dB Oct 1 35 0 74 Butterworth 24dB Oct 1 15 0 87 Please note that unlike conventional analogue crossovers crossover points and slopes are set with absolute accuracy since component to...

Страница 34: ...all limiters using too fast an attack or release time will result in excessive low frequency distortion In the Design a Xover sub menu there is an option for automatic limiter time constants In this mode the time constants will be automatically set from the Highpass filter frequency according to the table below The time constants are set by the high pass filter frequency for that channel High Pass...

Страница 35: ...ecification Have a release time which is sufficiently long to avoid the limiter itself modulating the program Be intelligent enough to adjust the envelope of the limiter according to the frequency content of the program material The XO1 s limiters are capable of performing all these tasks The only parameter which the user must set manually is the threshold and it is crucial that this is done corre...

Страница 36: ...Note the corresponding dB value Check the gain of your amplifier which needs to be in dB Subtract this gain figure from the dB value obtained from the table to find the required absolute setting for the limiter thresholds Note that for safety always set the limiter threshold 1 or 2 dB below the maximum allowable worked out using the above method ALWAYS REFER TO YOUR SPEAKER MANUFACTURER FOR LIMITE...

Страница 37: ...frequency 1kHz 20kHz Shelf gains r15dB in 0 1dB steps High and Lowpass Filters Filters 1 of each per output Freq Range HPF 10Hz 16kHz 1 36 octave steps Freq Range LPF 35Hz 22kHz 1 36 octave steps Responses Bessel Butterworth 12 18 24dB Oct Linkwitz Riley 24dB Oct Limiters Threshold 22dBu to 10dBu Attack time 0 3 to 90 milliseconds Release time 2 4 8 16 32 x Attack time Display 2x20 character backl...

Страница 38: ...ervice facility Defects caused by unauthorised modifications misuse negligence act of God or accident or any use of this product that is not in accordance with the instructions provided by XTA are not covered by this warranty This warranty is exclusive and no other warranty is expressed or implied XTA is not liable for consequential damages Options and Accessories Part Description XO1 Transformer ...

Страница 39: ... dB Vrms dB Vrms 22 9 75 5 1 38 21 8 69 4 1 23 20 7 75 3 1 09 19 6 90 2 0 98 18 6 15 1 0 87 17 5 48 0 0 77 16 4 89 1 0 69 15 4 36 2 0 62 14 3 88 3 0 55 13 3 46 4 0 49 12 3 08 5 0 44 11 2 75 6 0 39 10 2 45 7 0 35 9 2 18 8 0 31 8 1 95 9 0 27 7 1 73 10 0 24 6 1 55 Calculation Vrms 0 7746 x 10 dBu 20 ...

Страница 40: ...Low Mid High Low Mid High 22 1Hz 120Hz 120Hz 1k82Hz 1k82Hz 22kHz 22 1Hz 120Hz 120Hz 1k82Hz 1k82Hz 22kHz 4 way 2 Low LoMid HiMid High Aux Aux 15Hz 149Hz 149Hz 1k31Hz 1k31Hz 8kHz 8kHz 22kHz 20 1Hz 22kHz 20 1Hz 22kHz 5 way 1 Sub Low LoMid HiMid High Aux 15Hz 80 3Hz 80 3Hz 180Hz 180Hz 1k31Hz 1k31Hz 8kHz 8kHz 22kHz 20 1Hz 22kHz 6 way LoSub Sub Low LoMid HiMid High 15Hz 80 3Hz 80 3Hz 149Hz 149Hz 1kHz 1k...

Страница 41: ...Page 40 DXO1Operators Manual Appendix 3 Equalisation Curves Parametric Filter Gain Curves Parametric Filter Q Curves Parametric Filter High and Low Shelving Responses ...

Страница 42: ...XO1 Operators Manual Page 41 Parametric Filter High Q Notch Filter Response High Pass Filter Response Curves Low Pass Filter Response Curves ...

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