Black Cube Statement Lehmannaudio
Contents
1. 280 6240 fax 49 2202 280 6239 email info lehmannaudio de Web www lehmannaudio de2. c2 SO oft Ex Le a m 1 R102 R202 Here are free slots for custom loads To activate these loads switches nr 3 accessible from the bottom outside have to be put into the on position Capacitive or resistive load placed here will be connected in parallel to all other activated loads at least parallel to the default load 47k 100pF 2 Gain_L Gain_R These jumpers change gain by 10dB The jumpers are activated by default Using DIP switches Nr 1 the gain is 30dB off and 50dB on respectively If the selected gain is too high the jumpers can be put Off 3 Bass_L Bass_R These jumpers activate the Soft Bass Rolloff Filter to avoid high energy low frequency trans mission that can damage loudspeaker chassis Corner frequency of this filter is app 60 Hz attenuation is 6dB Oct The jumpers are not activated as default 4 DC_L DC_R By actiation of these jumpers the output capacitors are bridged The DC jumpers are not activated as default WARNING When the output capacitors are bridged there can be DC offset voltage pre sent at the Black Cube Statement s output connectors Please make sure that the following input stage is AC coupled before activating the DC jumpers If you do not know the coupling status of the next following input stage have your setup checked by a dealer or avoid to use this jumper DC at the output stage of a power amplifier can destroy loudspeaker chassis Common settings sensitivity lo
3. Lehmannaudio Black Cube Statement High End MM MC Phono Stage High Precision Passive RIAA Network Manual Valued customer Congratulations for buying the Lehmannaudio Black Cube Statement phono RIAA preamplifier The Black Cube Statement is manufactured in Germany using very high quality components and carefully constructed to give you many years of musical pleasure This unit is made only for being inserted between a turntable s passive cartridge output and any audio amplifiers high level input The Black Cube Statement will handle nearly any system cartridge from high level to low level MM or MC and is made to fulfill the demands of audiophi les who enjoy analog music reproduction Please keep this manual nearby the Black Cube Statement so that you can refer to it for further use Precautions Please read the following before operating your Black Cube Statement phono preamp lifier Wherever applicable below Black Cube Statement also includes the external power supply and its cable While Installing the Black Cube Statement Make sure that you have the appropriate version for your mains voltage Be careful to prevent the Black Cube Statement from getting wet do not allow water to enter the Black Cube Statement especially when raining or snowing or near a body of water Other wise fire or electrical shock may result Do not place heavy objects on the power cord If the cord is damaged fire or electrical shock may
4. ad switch Nr 1 2 3 4 ON MC 500uV 1K free 100R Gain 61dB for custom load OFF MM 5mV Gain 41dB The Black Cube Statement supplies practically unlimited load adaption for practically every cartridge on the market The high maximum gain of 66dB for MC cartridges makes sure that even very low output cartridges can be used with satisfactory results Sensitivity quoted above is calculated for an output level of 500mV It is not possible to overload the Black Cube Statement with any known phono cartridge if the unit is set up correctly Below some DIP switch gain jumper combinations for several kinds of cartridge are shown Please note that both channel have to be configured identically to maintain correct stereo balance Switch 1 2 3 4 View Gain Dip switch Jumper Cartridge MM off off off off Te m X MM High Output off off off off 1234 MC 47kOhm on off off off m m X MC 47kOhm on off off off 1234 high output MC 1kOhm on on off off jfa m g X MC 1kOhm on on off off 1234 a high mid output MC 100 Ohm on off off on un Z m X MC 100 Ohm on off off on 1234 high mid output MC custom load on off on off ON X MC custom load on off on off E P high mid output Please note that the X Jumper in place the white squares in Default the images symbolize the single switches Notes Manufacturer s address Lehmannaudio Vertriebs GmbH Richard Zanders Str 54 D 51469 Bergisch Gladbach Germany phone 49 2202
5. cting the Black Cube State ment to your actual setup and to the AC outlet Otherwise an extremely loud noise could damage your loudspeakers or even your hearing If you plan not to use the Black Cube Statement for a long period of time such as when you are on vacation remove the power plug from the AC outlet Otherwise a fire could possibly result If any abnormality occurs while using the Black Cube Statement remove the plug from the AC outlet In this case first shut off the power amplifiers or turn down the volume controls and so on to avoid possibly damaging transients If you notice any abnormality such as smoke smell noise etc remove the plug from the AC outlet Confirm that the abnormality is no longer present then consult your dealer for repair If you continue using the Black Cube Statement under abnormal conditions fire or electrical shock may result If a foreign object or water enters inside the equipment remove the Plug from the AC out let and consult your dealer for repair If you continue using the Black Cube Statement under this condition fire or electrical shock may result If the power cord is damaged for example if it is cut or if the core wire is exposed ask your dealer for a replacement of the external power supply If you continue using the Black Cube Statement under this conditions fire or electrical shock may result If the Black Cube Statement or the external power supply is dropped or i
6. e Place the Black Cube Statement on a clean smooth surface e Carefully unscrew the four screws of the audio board s case with the tool included with the Black Cube Statement or any other 2mm hex screwdriver e After removing the top you can now insert your custom input load for each chan nel Do not use any tools that could damage the electronic circuit Please use high quality metal film resistors e The DIP switches are now accessible from the outside at the bottom of the unit near the input RCA connectors To activate your custom load you have to set the switches no 3 to the on position Use only high quality resistors for custom load impedances Install these resistors only if you know what you are doing Otherwise please consult your dealer If all switches are in the OFF position the input impedance is 47kOhms which is suitable for most MM cartridges The gain switch can be activated deparately so that MC 47k becomes an option This is recommended for some MC cartridges Please refer to your cartridge s information sheet for the recommended load If you only know the internal impedance of your cartridge you can use the rule that the load imnpe dance should not be less then 10x the internal impedance of the cartridge Both channel settings and impedances have to be identical Audio board view mE u tH C302 8 C301 a 3 RD C106 C206 205 aT Hee eal ora 503 Ke Z os ab At Jc3os lt of 1 2 TE F R308
7. ed onboard the audio pcb Case of 1 5mm aluminium protects the audio electronics Please read this manual first before connecting the Black Cube Statement to mains voltage Input side simplified OO 1 Ground connection GND If your turntable has a separate ground cable you should connect it here You can connect any of 4mm plugs open ends cable shoes 2 Signal input conectors IN Please connect your tuntable s output here To minimize loss in the interconnect use the shortest possible cable between tonearm and the Black Cube Statement Be careful to preserve correct channel connections left to left and right to right Output side simplified oO 1 Audio outputs OUT RIAA filtered high level output Please connect your output cables to the line input to be used For example to a line level preamplifier active loudspeakers with volume control or power amplifier input with volume control Be careful to preserve correct channel connections left to left and right to right WARNING You must never connect the output cables to a following phono input because RIAA filtering and amplification would be done twice You could damage the following phono stage or your power amplifier and loudspeakers The resulting noise could even damage your hearing 2 Control LED Lits when the Black Cube Statement audio sectionis connected to the power supply 3 Input for the external AC power supply The Blac
8. f the case is damaged remove the power supply from the AC outlet and consult your dealer If you conti nue using the Black Cube Statement under abnormal conditions fire or electrical shock may result Maintenance Before cleaning the Black Cube Statement remove the power plug from the AC outlet for safety Otherwise an electrical shock may result Do not open the external power supply of the Black Cube Statement There are hazardous voltages inside that might result in an injury or an electrical shock Description The passive filter network of the Black Cube Statement is located between two linear active amplifier stages Phase errors that occur due to active filter designs are thereby eliminated Low loss high precision WIMA foil capacitors in the filter network are responsible for very good localization and soundstage reproduction Sensitivity for 775mV eff output voltage 0 77mV 7 7mV switchable on board MC MM Input capacitance 100pF default Input impedances 47 kOhms 1 kOhms 100 Ohms switchble on board Dip switches with gold plated contacts one slot for solder free installation of custom impedance on the prin ted circuit board PCB No need for expensive impedance plugs Output impedance lt 100 Ohms Gold plated RCA connectors massive ground connector The external AC power supply of the Black Cube Statement can be placed up to two meters away from the audio section The AC voltage is rectified regulated and buffer
9. k Cube Statement Audio section is connected to the external AC power supply Ple ase make sure that you use a power supply with the correct voltage 18 22 V AC that is ground free Matching of gain and input load You can change input impedance resistive loading and gain by using the onboard DIP switches for each channel separately These switches are accessible from the bottom of the unit Input capacitance is always 100pF You may change the setting of the switches with the Black Cube Statement connected to mains voltage and even to your stereo system ho wever in that case please first turn your volume knob to the minimum position because loud pops could occur during switching DIP switch Table gain input load Nr 1 2 3 4 ON MC 760uV 1 kOhms free 100R Gain 61dB for custom load OFF MM 7 6mV Gain 41dB The Black Cube Statement is highly flexible and also offers an insert point R103 R203 for inserting a resistor to accommodate cartridges which require special loading to be activated by the switch and one additional hardwire slot for each channel for permanant installation R100 R200 with direct effectivity The impedance switches connect the impedance resistors in parallel to the 47k resistor By using the special impedance slots load options are unlimited Soldering is not neccessary Before you insert a custom load please do the following e Disconnect the power from the Black Cube Statement s power supply
10. result In particular it is possible that one might accidantally place a heavy object on a carpet that covers the cord definitely avoid these situations Do not install the Black Cube Statement in a place where it might be exposed to oil smoke or steam for example near a cooking table or humidifier Otherwise fire or electrical shock may result Do not place the Black Cube Statement on an unstable surface such as an unstable bench or slanted surface Otherwise the device may fall or drop resulting in an injury Do not place the Black Cube Statement near a heating device Otherwise the cord sheath may melt resulting in fire or electrical shock Do not locate the Black Cube Statement in a place subject to excessive heat such as inside a car with all the windows closed or in direct sunlight Otherwise fire may result Do not handle the power plug with wet hands Otherwise you may receive an electrical shock When you remove the power plug be sure to hold the plug Never pull on the cord Otherwi se the power cord may become damaged resulting in fire or electrical shock The Black Cube Statement offers superb sonic quality To ensure best possible results you Should use the best quality connecting cables that you can afford Regular maintenance invol ves keeping all connections clean using a quality contact cleaner Using the Black Cube Statement Do not touch the Black Cube Statement under the following circum
11. stances If you hear thunder remove the power supply from the AC outlet as soon as possible If you fear a lightning hit and the Black Cube Statement has been connected to an AC outlet do not touch the power supply Otherwise you may receive an electrical shock Do not attempt to modify this equipment Otherwise fire or electrical shock may result Warranty is void on modified devices Exceptions dip switch settings and fitting of custom input load If you feel uncertain about how to set up your unit properly consult your dealer If you think the Black Cube Statement needs to be checked for maintenance or repair consult your dealer Do not place a container of water or any small metal object on top of the Black Cube Statement or the external power supply If water is spilled or if the metal object gets inside fire or electrical shock may result This applies to vases pottet plants glasses cosmetic bottles medicine etc Do not change the setting of the dipswitches with any tools that consist of metal Do not damage process bend twist stretch or heat the power cord Ifthe cord is dama ged fire or electrical shock may result When you are connecting other audio devices to the Black Cube Statement make sure that you first turn off the power to all devices to be connected Refer to the user s guide for each device and use the specific cable for connection Set the volume levels of all devices to minimum before conne
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