SUB AMP 1 DSP ENG
Contents
1. Reduce the number of middlemen Website www xtz se E mail info xtz se Technical presentation Why buy an active Amplifier with integrated DSP Amplifier DSP SUB AMP 1 DSP works just as good for those who want to power the passive subwoofers XTZ 99 W10 17P or any other subwoofers SUB AMP1 DSP can be perfect as an amplifier for bi amping full range speakers By using one or two subwoofers with correct placement it is often easier to achieve a better frequency response SUB AMP1 DSP gives you valuable benefits when struggling with the room modes Finding an acoustically acceptable listening room is often hard Normally you can not change your living room that much and you need to accept a lot of losses in the sound quality This is a known fact but many brands do not touch this issue because it is not easy to solve this problem with traditional analogue technology It s impossible to construct a normal analogue subwoofer that sounds perfect in every room Every room has unknown and unique acoustical characteristic that affect the sound quality The biggest problems are found in the low frequency spectrum A regular not acoustically treated room has severe resonances and dips in this spectrum caused by so called standing waves Depending on listening positions they produce severly unbalanced sound The frequency response of a good loudspeaker should be in the range of 3dB but a normal room can introduc2. You can select frequencies between 16 250 Hz PEQ 1 Amplitude One step 0 2 0 3dB Amplitude Adjust amplitude boost or cut You can select amplitudes between 12dB 24dB 18 Function 21 How to use Function 19 33 Function 34 How to use Function 34 Function 35 PEQ 1 Q Factor Q Factor Select Q factor You can select Q factor between 0 5 50 The parametrical equalizer is a precision tool to achieve perfect sound balance The parametrical equalizer allows controlling over the centre frequency bandwidth and amplitudes parameters of the bell filters That makes it possible to adjust the frequency response with very high precision Dips and overshoots in the frequency response can be compensated Example With a high Q factor narrow filters you can cut very narrow frequency band which can be used for hum cancelling 50H In the parametric equalizer 3 parameters can be adjusted 1 Frequency Measured in Hz 2 Amplitude boost or cut Measured in dB 3 Q factor filter bandwidth This refers to the width of the bell curve Frequency is measured in Hz Herz and decides were in the spectra compensation can be done Range 16 250Hz Amplitude is measured in dB and decides how much compensation should be done on a mode or dip A positive value is an amplification of the signal A negative value is a reduction of the signal Range 12dB to 12dB Q Factor between 0 5 and 50 set
3. A XTZ SUB AMP1 DSP Subwoofer Amplifier 2009 XTZ AB www xtz se Contents About XTZ Technical presentation Preparations Sound philosophy Installation and placement tips Mounting and connection tips Functional reference Quick reference Functions Area of usage Sound adjustment Technical explanations Technical specifications Service amp Support Page oN OO oO A Q 12 13 21 23 24 Contents XTZ SUB AMP1 DSP offers a wide range of possibilities In order to utilize your new amplifier in the best way you should carefully read through this manual before using the amplifier for the first time It may take some patience in order to make the hifi equipment sound optimal If you have no previous experience of these kinds of installations or if you have any questions feel free to contact our free of charge support and we will help you See further under the heading of Support on the last page of this manual Philosophy XTZ Goals Contact us Our reference and starting point is to reproduce a natural sound but also in respect to the fact that acoustics always is a matter of personal taste To provide the optimal relation between price performance and quality on the market Our concept To produce the perfect compromise Cost effective manufacturing in large volumes Our priority is product quality before marketing so the customer should get the best ratio of price and quality
4. Higher useful power the subwoofer can handle higher sound levels More control and a better sounding bass Decreased noise level in the listening room The functions 14 15 16 and 17 are dependant on each other and should therefore be used in a certain order HIGH CUT FILTER Frequency One step 1 Hz High cut filters cut the upper frequencies Adjustable from 40 250Hz Reason to use high cut filter To avoid frequency overlapping with the main system To create an optimal acoustical cross over to the front system and or home cinema system HIGH CUT FILTER Slope Select the slope on the high cut filter Select 12dB or 24dB 15 Function 16 Function 17 OUTPUT Polarity Select polarity Select Negative or Positive Here you can select the polarity You can select either Negative or Positive OUTPUT Phase 1st Ord Phase The phase adjusts from o 180 degrees Incorrect phase alignment between the main loudspeakers and subwoofer causes a drop in the frequency response of the whole system at the crossover frequency The graphs to the right Fig 1 show the effect of phase difference to the frequency response The phase difference between the main loudspeakers and subwoofer at the listening position is dependent upon the position of the subwoofer so the phase adjustment should be done only after the preferred position is found 16 One step 1 degree How to
5. the recommended angle between the front speakers should be 45 Either you can have the loudspeakers angled in towards the listener or you can have them directed straight ahead Some loudspeakers sound better when angled but this may also depend on reflections from the side walls By angling the loudspeakers inwards you decrease unwanted reflections and thus you get a better stereo perspective 0 8x Placement of the subwoofer The correct height Cables Finally The placement of the subwoofer in the room dramatically affects the overall frequency response and sound level of the system At low frequencies the effect of the room is strong Even a slight change in the subwoofer s location can make a significant difference in the frequency balance Patience and methodical experimentation is needed to find an optimal placement The placement affects the phase difference between the main loudspeakers and the subwoofer One basic rule is to place the subwoofer together with or near the front system especially important if the front loudspeaker also propagate bass frequencies as this will minimize the risk of phase eliminations in the room If the loudspeakers are small they should be placed on stands or tilted so that they are on the same level as the ears Try to keep them as short as possible By its electrical parameters a long conductor will have a bigger influence on the sound than a short one The subwoofer cable
6. adjust the Gain with the Value buttons as high as possible but just below getting the red LED clip is flashing Do the following 1 Turn the main volume to zero 0 or low level with the volume knob 2 Play a laud music CD observing the INPUT GAIN LED display while you adjust the Gain with the VALUE buttons All but the red LEDs should flash or be on If the red LED Clip turns on decrease the Gain with the VALUE buttons appropriately Use a music CD with high output level If you not want to play music loud you can do the same operation with the main speakers disconnected The level should be as high as possible but without the red Input Gain is getting on this gives the best signal noise ratio Adjust main volume with the volume knob _ 13 PC Remote is a software allowing you to control SUB AMP1 DSP from a PC You can sit in listening position and do all settings The program is in price included but you need to download it from www xtz se The manual for PC remote can you also download from www xtz se One push One step Hold down the button Quick step One step 0 1 dB FUNCTION 1 Function 2 11 How to use functions 2 11 Function 12 Function 13 Function 2 11 contents the graphical equalizer The graphical equalizer has 10 band frequencies Band centre frequencies Function 2 16Hz Function 3 20Hz Function 4 25Hz Functi
7. the internal subwoofer presets and any number of additional settings in your computer They can be _ 20 re called any time Last recorded preset is shown in function 1 to the left of the clock _ 21 Technical explanations Slope Boundary frequency Cut off frequency Graphical equalizer GEQ Parametric equalizer PEQ Q factor The slope is commonly used to describe the steepness degree of the filter A higher slope value indicates a steeper filter Cut off frequency fc is the frequency either above which or below which the power output of a circuit such as a line amplifier or filter is reduced to 12 of the pass band power An electronic or DSP equalizer that allows to increase or decrease boost or cut signal amplitude in a fixed number of frequency bands of an audio equipment An electronic or DSP equalizer that allows contro over the centre frequency bandwidth and amplitude of so called bell filters for precise adjustment of the frequency response of an audio equipment This is a so called quality factor which refers to the width of the bell curve The higher the Q factor the narrower the bandwidth A high Q means that only a very narrow frequency range is affected whereas a low Q factor affects more frequencies 22 Frequency Room modes Dip Room modes come from reflections in the room Sound directly from the speakers and sound reflections forms a pattern in
8. the room Same frequency in phase gives you room modes If the frequency is in opposite phase they will put out each other and you get a dip _ 23 Construction type Amplifier Class AB Dimensions 376 x 396 x 225 mm HxWxD 22mm more with the feet Weight 18 5 kg pes Connections Gold plated RCA XLR Balanced input Speaker input Banana plug Pole screw Speaker output Banana plug Pole screw Power amplifier 300 W RMS in 4 ohm 400 W RMS in 2 ohm PC Remote PC Remote is software allowing you to control Communication Po CUDA Eaten KIEJ SUB AMP 1 DSP from a PC via the RS 232 port General Port Setings Driver Deta Resources You can sit in listening position and do all settings Bts per second The program is included in the price but you need Beater to download the newest software from www xtz se Part None El seh Following setting is needed to get PC Remote to TA work m n c i Advanced Restore Defaults ort Com Bits per second 9600 Parity None Stop bits 1 Flow control None cod If using a USB gt RS 232 converter make sure the port is changed to COM1 _ 24 Service Support If you need service contact your local dealer You are always welcome to contact us if you have problems with product by e mail support xtz se Webpage www xtz se Please contact our free of charge support if you need installation advice or if any problems occur during the installation Contact u
9. e variations of 15dB This leads to the conclusion that even a very good loudspeaker can perform poor in a bad room And the fact is that most regular rooms suffer from acoustical problems To build a perfect listening room is extremely expensive With the DSP technology we can create a good balanced sound in every room We have equipped the XTZ SUB AMP1 DSP with a very powerful 300 watt amplifier and a large heat sink for effective cooling For professional use studio PA etc it is equipped with a balanced input The terminal connectors are gold plated and very solid To achieve a high power and long durability the amplifier is built with a large ring coil transformer large electrolyte capacitors and has MosFet transistors in the output stage The built in DSP module is equipped with 24 bit 96 kHz AD DA converters and the best software on the market today allowing you perfect adaptation of the subwoofer to the room characteristic and adjustment of the sound character always maintaining the best possible 5 The cabinet Unpacking Accessories PC Remote quality of sound In order to provide the highest sound quality the DSP runs advanced low noise filter algorithms with 32 bit calculation precision The software consists of parametric and graphic equalizer phase correction low cut and high cut filters and delay There are many cheap equalizers on the market but most of them are not good enough
10. gh level input If your amplifier does not have subwoofer output use this input from your normal speaker output Mains power connector Main switch for main power Select your local mains voltage 230V in EU 110V in USA High level output To connect to your subwoofer _ 11 Quick reference Connection INPUT SELECTOR Input gain Subsonic Filter High Cut Filter Graphical Equalizer Parametrical Equalizer Level adjustment If you want to use the product quickly follow these instructions Connect to input XLR RCA or Speaker input Select your local mains voltage with the power switch Connect the power switch and turn the main switch on Choose one of XLR RCA or Speaker input INPUT GAIN Select the value 15 0dB Frequency Select the value 20Hz Slope Select the value 24dB Frequency Select the value 120Hz Slope Select the value 24dB The graphical Equalizer is an easy and well known way to adjust the sound character Adjust the frequency response in functions 2 11 The level can be adjusted in the range of 12dB Select the frequency with the buttons FUNCTION Select the level with the buttons VALUE It is also possible to do a setting with the parametric equalizer and make a rough adjustment to the sound character you like Read the next chapter It is possible to do a setting with the parametrical equalizer and make a rough adjustment to the character you like Do the follow
11. he setting Push the VALUE button store to store the setting If you want to restore a previously saved setting Go to preset you want to restore Push the VALUE button recall to restore the setting All DSP setting can be stored in the presets FUNCTION 1 After switching off and again on the subwoofer the last used preset will be active PRESET 1 MUSIC Suitible for music Preset 1 is special read only setting which flattens all equalizer bands and set up all the other parameters to useful default values If you have done too many changes resulting in a bad sound you can easily discard your setting by re calling the PRESET 1 PRESETs 2 HOMECINEMA Suitible for homecinema Preset 2 and 3 are preinstalled PRESET 3 FLAT settings but have no security for Settings for deep bass and more energy in the overwriting higher bass area Broad band settings fron 20 100Hz Preset 2 and 3 are two settings examples that you can adapt to your needs However as soon as you overwrite them using Store they are lost PRESET 10 is a special preset with all filters switched to off and equalizer flatten It is used for system measurement in full band mode in the factory It is not recommended as a useful setting and can be overwritten by user specific setting All remaining presets 4 9 are equal to the PRESET 1 but only as long as you do not overwrite them Be aware that with the PC remote you can store
12. ing PEQ1 Frequency 40 Hz Q factor 1 40 PEQ2 Frequency 90 Hz Q factor 1 40 PEQ3 Frequency 140 Hz Q factor 1 40 Adjust the levels on PEQ 1 2 and 3 to the sound character that you like With this setting the bass frequency is split in to 3 bands PEQ 1 deep bass PEQ 2 mid bass PEQ 3 upper bass Adjust the main volume with the volume knob 8 12 Connection How to control the functions Select function Select value Function 1 How to use function 1 Connect to input XLR RCA or Speaker input Select your local mains voltage with the power switch Europe 230Volt US 110Volt Turn the main volume to a low value Connect the power cable and turn the main switch on Now the LCD display show INPUT Gain Functions that indicated on the LCD display can be controlled by buttons below LCD display or via the PC remote program With the FUNCTION buttons you select which function you want to change With the VALUE buttons you select which value you want for each function INPUT Gain Adjust the input gain The level indicates the input gain on the display In the left bottom corner of the Function 1 display the number of recently selected preset e g P4 and the time of day is shown The level indicates the signal level at the input of the DSP module In order to get the best signal to noise ratio it is very important to adjust the proper gain You should try to
13. lay 8 Volume knob 9 Balanced input 10 Ground select 11 Low level input 12 RS 232 PC connector 13 Input selections 14 High level input speaker input 15 Power connector 16 Mains switch 17 Voltage select 18 High level Output getting the red INPUT GAIN diode 1 Input gain INPUT GAIN METER Should be as high as possible but without Indicate the input level flashing this gives the best signal noise ratio 2 Standby indicator Turns red in standby Turns blue when the subwoofer is ON 3 LCD display LCD Display that shows all functions and values 4 Function button FUNCTION Select function with this two buttons 5 Value buttons VALUE Select value with this two buttons to adjust the _ 10 6 IR 7 LCD Contrast 8 Volume knob 9 Balanced input 10 Ground choice 11 Low level input 12 RS 232 PC connector 13 Input selector 14 Speaker input 15 Power connector 16 Main switch 17 Power switch 18 High Level Output functions Infrared eye for possible remote control Not in use Adjust the contrast in the display VOLUME Adjust the main volume XLR Balanced input Depending on equipment us GRD or LIFT Only in use if you connected with XLR RCA input Connector for PC For the PC remote software The program is in price included but you need to download it from www xtz se INPUT SELECTOR Select input between XLR RCA or High level input SPEAKER INPUT Hi
14. o matter how good the equipment is in the wrong listening environment it will inevitably sound bad There are some basic rules concerning a proper loudspeaker installation Carpets curtains and soft furniture absorb mid range and high frequency sound and this is preferrable Big empty areas on the other hand reflect it and produce hard reflections that may lead to a blurry dialogue Apart from colouring the sound also the perspective of the sound will deteriorate Reflections in the room can roughly be compared to the reflections that vield ghost pictures on a TV screen A loudspeaker that is placed near a wall ceiling or floor will amplify lower frequencies in a sometimes not desirable way since it may lead to an indistinct sound recreation This amplification becomes even more obvious if the loudspeaker is placed near a corner Thus for a sound as clear as possible the loudspeaker should be placed at least 30 cm about 12 inch away from the wall Some constructions are made to be placed closed to a wall Quadratic rooms or rooms where the length is exactly twice as long as the width should be avoided since they may create unwanted resonance Be aware that furniture may vibrate and thus create bad sound at loud bass To get the best result the front speakers should be placed symmetrical in front of the listener The distance between the front speakers should be around 80 of the distance to the listener In other words
15. on 5 31 5 Function 6 40Hz Function 7 50Hz Function 8 63 Hz Function 9 80Hz Function 10 100 Hz Function 11 125 Hz The level can be adjusted in the range of 12dB Select the band frequency of interest with the buttons FUNCTION and adjust the level with the buttons VALUE How to use function 2 11 via PC remote SUBSONIC FILTER Frequency Low cut filters to cut the lowest frequencies Adjustable from 10 40Hz SUBSONIC FILTER Slope Select the slope on the subsonic filter Select 12dB or 24dB 14 One step 0 1 dB Software can be downloaded from www xtz se One step 1 Hz How to use function 12 and 13 Function 14 Function 15 The subsonic filter cuts unwanted frequencies in the deepest bass range An example of unwanted sound is rumble from a turntable or wind noise from a microphone The reason to cut these unwanted frequencies To decrease the noise level in the listening room Subsonic noise causes unnecessary high power from the amplifier To decrease non linear distortions in the amplifier and the loudspeaker Increase the power headroom Some rooms amplify the lower frequencies so the bass frequencies get uncontrolled Select frequency A typical value is 20Hz but use whatever is most suitable Select slope A normal value is 24dB but try what suits you best With a perfect adjusted subsonic filter you achieve the benefits
16. s by e mail support xtz se and include your phone number if you require help and we will ring you back _ 25 ALWAYS pack the product part very carefully Unfortunately damages during transportation are very common If the package is weak the transporting company does not compensate damages Always enclose a copy of the receipt and a description of the defect
17. se for the best sound balance between the subwoofer and the main loudspeakers If you not are satisfied whit the setting repeat iteratively the steps above again and again OUTPUT Delay Adjust the time delay Adjustable from o to 50ms or from o to 17 261 m 17 FRONT WOOFER SPEAKER One step 0 021 ms or 0 719 cm How to use function 18 Function 19 33 Function 19 Funktion 20 With the function OUTPUT Delay you can store a time delay Therefore you can perfectly adapt SUB AMP1 DSP together with a subwoofer to your main speaker to avoid time and phase problem 1 Measure the distance between main speaker and gt listening position _ y 2 Measure the distance between subwoofer and listening position 3 Set the difference between these values as delay __ FRONT SPEAKER If you not can delay the signal to the main speakers avoid having longer distance to the subwoofer than the main speaker Function 19 33 contains the parametrical equalizer Frequency The parametrical equalizer has 5 bands Each band has 3 functions 1 Frequency 2 Amplitude 3 Q factor Each band contains 3 functions Function 19 20 21 PEQ 1 Function 22 23 24 PEQ 2 Function 25 26 27 PEQ 3 Function 28 29 30 PEQ 4 Function 31 32 33 PEQ 5 Symbolic picture We only show PEQ 1 the other 4 bands work in exactly the same way PEQ 1 Frequency One step 1 Hz Frequency Select frequency
18. should be shielded to avoid noise Make sure that all connections are clean and not oxidised All connections should be mechanically stable both power signal and loudspeaker cables Signal cables should be separated from other cables Please remember that good sound is a matter of taste so you have to experiment to obtain your favourite one We wish you best of luck Mounting alternatives Connect using the correct phase Overload Load SUB AMP1 DSP is constructed to be placed lying down or standing up Place the logotype in same direction as SUB AMP1 DSP Always connect using the correct phase from the pole on the amplifier to the pole on the loudspeaker and corresponding for minus With high power load under long time there is risk of overloading the driver and or the amplifier We recommend that no more than 2pcs of 8 Ohms subwoofer should be connected to SUB AMP1 DSP This is because the impedance could be extremely low Mount the feet on the side you want to be down If you by accident connect the other way there is no risk of damage However the sound will not be correct especially in the lower frequencies If you play extremely loud for a long time there is a big risk that you destroy the product Functional reference Rear 1 Input gain meter panel 2 Standby indicators 3 LCD display 4 Function button 5 Value buttons 6 IR port 7 Contrast adjustments for LCD Disp
19. tles the width of the peak or dip A high value means a narrow peak dip and a low value means a wide peak dip BACKLIGHT AUTO OFF Choose if the LCD display should be on constantly or be shut off after a certain time Choose between ON or Auto off 1 30 minutes In ON mode the LCD display is on constantly In Auto off mode the amplifier switched to standby after the chosen time Choose between 1 to 30 minutes If you use any button the LCD display turns on automatically AMPLIFIER AUTO OFF Choose if the amplifier should be on constantly or be shut off after a certain time Choose between ON or Auto off 1 30 minutes 19 One step 0 1 Q factor See Technical explanations Frequency How to use Function In ON mode the amplifier is on constantly 35 In Auto off mode the amplifier switched to standby after the chosen time Choose between 1 to 30 minutes Function 36 REAL TIME CLOCK Adjust the clock How to use Function Adjust the clock with Function and Value 36 buttons Function 37 46 PRESET These functions handle the presets You can store different settings for different rooms choices of music front system surround system etc Then it s very convenient to change the sound character with different presets Recall VALUE Selects the stored setting Store VALUE Store the chosen setting How to use Function Ifyou want to store a setting 37 46 Go to the preset that you want to store t
20. to maintain the high sound quality for low frequencies because of using not appropriate algorithms The DSP software used in the subwoofer has been developed by a world leading German company with 25 years tradition in professional audio There are many years of development behind the software we use in SUB AMP1 DSP The cabinet is made of MDF The surface is varnished black piano paint giving it a proper look Carefully unpack the speaker and pay attention so you don t break anything If possible save the packing box for future transportations If there should be any damage on the product please contact your retailer Check that the mains voltage marking on the back panel matches your local mains voltage If the product is cold wait until it reaches room temperature before connecting the power cord If you don t do this you can cause damage of the product Mains power cord User manual Logotype Rubber feet PC Remote is a software allowing you to control SUB AMP1 DSP from a PC You can sit in listening position and do all settings The program is included in price but you need to download the software from www xtz se In which room do you achieve the best sound Reflections Amplification of bass frequencies Room dimensions Furniture Front speakers Angling This chapter contains common information on loudspeaker placement and installation These are general rules so there are exceptions N
21. use function 14 15 16 and 17 Function 18 Incorrect frequency polarity and phase alignment between the main loudspeakers and subwoofer causes a gap in the frequency response of the whole system at the crossover frequency The graph to the right shows the effect of phase difference to the frequency response The phase difference between the main loudspeakers and subwoofer at the listening position is dependent upon the position of the subwoofer so the phase adjustment should be done only after the preferred position has been found To choose the right high cut frequency is very important but this is also depending on the setting of polarity function 16 and phase function 17 These setting should be done in this order Select polarity Normally positive is the right value but depending on placement and equipment try find the mode that gives the most bass energy the polarity change is equivalent to change the phase by 180 degree 1 Adjust the level of the bass to the equal level as the front speaker bass level 2 Switch between Negative and Positive and try to find the mode that gives you most bass energy Select the slope Normally the 24dB octave is the best value but set the slope for the best sound balance between the subwoofer and the main loudspeakers Select of frequency Select the frequency for the best sound balance between the subwoofer and the main loudspeakers Select the phase Adjust the pha
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