user manual poambo
Contents
1. poambo High End Stereo Amplifier perfects SACD Q SUPER AUDIO CD User Manual Version 1 4 finitus finitus 06 2012 Inhalt 1 Safety pc LP Coa e 9 ae en ee ee ene ee ee 3 2 OVETVICW PS D ea EAE a 5 3 MEI ee a a 5 4 Content Of The BOX nee ne ea e E EEEa dimen 5 5 The Back And The Front Panel Of The Device 6 5 1 The back panel of the poambo 6 5 2 The front panel of the poambo ss 7 9 2 1 Error display on the front panel insistant 8 6 The Interior Of The poambo 9 6 1 Protection and detection systems 9 6 2 Technical T IR MeNMS ee sn element au 10 7 Operating The Pom ns nement linear d 11 7 1 Connection to the MIAN Bice eee itn eee 11 7 2 Cabling of the audio SiG Mal Siw cisgcscis a 226 sae nn ka ences aceasta 11 7 3 Powering up the DOM denatenninenss tceokseatntateuidetuantenremencecantuaneven 11 124 Listening tO MSIE 22 dun nes 11 8 Cleaning The poambo 12 9 The Controlling PC Son wane uen conde immenses 13 10 finitus Technologies Explained 14 102. extremely independent of external components Due to the circuits extremely high rejection ratio components like fuses power cords etc have no measurable and audible effect on the output signals of the poambo 14 11 Technical data of the poambo All measurements were performed with an Audio Precision measurement system Gain Frequency response Phase response THD N S N ratio Crosstalk Input impedance Damping factor Output power burst continuous Output power RMS continuous Input sensitivity Audio Inputs Audio Outputs Network connector Depth Max depth Width Height Max height Weight 20 0 dBV channel difference lt 0 1dBV 0 1dB 10Hz 0 8dB 200kHz open 5 10HZ 5 200kHz open linear phase 0 0007 open 1kHz lt 10Hz 80kHz unweighted 0 0030 1W 80 1kHz lt 10Hz 80kHz unweighted 0 0070 10W 8Q 1kHz lt 10Hz 80kHz unweighted 0 0080 50W 8Q 1kHz lt 10Hz 80kHz unweighted 0 0082 100W 8Q 1kHz lt 10Hz 80kHz unweighted 120dB lt 10Hz 80kHz unweighted lt 80dB 1kHz lt 10Hz 80kHz unweighted 4 7KQ 400 50W 80 1kHz 2x 135W 8Q 1kHz Sinus burst 1 9 2x 213W 4Q 1kHz Sinus burst 1 9 2x 105W 8Q RMS Sine 2x 180W 4Q RMS Sine 3 5Vrms Neuktrik RCA connectors speaker connections for cables up to 28mm 6mm banana connections possible Neutrik Ethercon 410 mm 430 mm incl connectors 390 mm 120 mm from grou
3. signal processing is very important inside the poambo The entire path of the audio signal is pure analog and set up discretely No operational amplifiers or audio chips are used A functional separation of the analog protection circuits and a complete physical seperation of the digital circuitry from the rest of the amplifier keeps the audio signal extremely clean 6 1 Protection and detection systems SOA Protection Limits the maximum power of the output transistors to the maximum allowable power preventing destruction of the output stages SOA Detection The finitus NOD non intrusive opto coupled detection detects if the SOA protection is active and opens the output relays to protect the speakers and the output stage DC Detection Opens the output relays to protect the speakers when a too high DC voltage is measured Clip Detection With the finitus TDC true difference clip detection real clipping is detected and the output relays are opened to protect the speakers Mains fail detection Detects a loss of the mains voltage and opens the output relays to protect the speakers Temperature measurement The temperature of the output stages and the rectifiers is monitored constantly If the maximum allowable temperature is exceeded the amplifier is separated from the speakers by opening the output relays Soft start Each time the poambo is switched on the large toroidal transformer is started smoothly thus inrush current is
4. 1 ALD active loaded differential amplifier 14 10 2 NOD non intrusive opto coupled detection 14 10 3 TDC true difference clip detection eee 14 10 4 FTA fast temperature compensated auto bias 14 10 5 OIS outside independent system 14 11 Technical data of the poambo n 15 Me COM eue oo dd do dodo 16 1 Safety Instructions CAUTION CAUTION Risk of electric shock Do not open the RISK OF ELECTRIC SHOCK enclosure DO NOT OPEN P x s There are no user serviceable parts inside the device The device may only be serviced by qualified personnel A The lightning flash with arrowhead symbol within an equilateral triangle is The exclamation mark within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the product intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE Read these instructions Keep these instructions Heed all warnings Follow all i
5. The carton should contain the following items 5 The Back And The Front Panel Of The Device 5 1 The back panel of the poambo Ethernet Abbildung 5 1 1 back of poambo The poambo has two RCA inputs on the rear panel The amplified audio signal is available at two outputs two terminals each for connecting the speakers On the back you find the mains socket including the power switch Below the socket is a small drawer with two fuses The inner one lies in the current path and the second outer serves as a replacement 5 2 The front panel of the poambo finitus soft start clip over de temperature mute Abbildung 5 2 1 front of poambo Two LEDs in the i points of the finitus logo indicate the operating mode both are illuminated red during normal operation If they flash alternately a special operating condition exists and is displayed on the LEDs The special operating conditions are explained below 5 2 1 Error display on the front panel The LEDs on the front panel provide information about the current status of the poambo If the two logo LEDs are flashing one of the following conditions exist Soft Start The device has been turned on and is just starting After a few seconds the LED disappears after another five seconds the speaker output is switched on and you can listen to music Clip The maximum output level has been exceeded In order to protec
6. he poambo is using ordinary degreasing kitchen cleaner Please do not use solvents as they can remove the print of the front and back plate The anodizing is very resistant to cleaning agents but one sees films remaining if applied incorrectly Spray a rag or preferably a microfiber cloth with cleaning agent and distribute it in the brushing direction on the surfaces of the poambo Rub evenly over the entire surface until the agent is dried up This way you get the typical streak free shine of the poambo Do not use oven cleaner or cleaning methods using abrasive particles They will scratch the only a few micrometers thick anodizing before cleaning Too much detergent dripping into the interior of the Always make sure to unplug the poambo from the mains power A poambo may cause an electric shock 12 9 The Controlling PC Software You can check the status of the poambo using the control software poambo control Therefore the poambo must be connected to a PC via ethernet For more details about the software its installation and use see the user manual of pomabo control which can be downloaded on our website www finitus de 13 10 finitus Technologies Explained 10 1 ALD active loaded differential amplifier The use of active loads in specific parts of the amplifier circuit has a similar effect as cascoding The bandwidth is increased and the amplifier circuit is decoupled from disturbance
7. led or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped The device has no standby mode if the power switch is in the off psition the device consumes no power o The heat sinks of the device may get hot after longer operation There is the risk of burn when touching them 2 Overview The poambo is a High End power amplifier Its convincing sound quality makes it a perfect partner in studio and HiFi environments paying attention to audio reproduction without compromises It perfectly fits to high resolution formats as the SACD DVD Audio and Vinyl as well as analog tapes 3 Outline The poambo features the finitus ALD technique active loaded differential amplifier which makes the poambo a low distortion and awesome musically sounding amp Including modern digital communication and protection systems its amplifier section is totally analog giving a maximum of performance Including an ethernet connection the poambo is ready for home server applications Enter a new listening dimension with the finitus poambo 4 Content Of The Box Unpack the poambo carefully and check for possible transport damage A amplifier poambo power cord user manual poambo this document CAUTION Do not connect the device when you discover damages loose parts or similar Keep the carton and packing materials for future transportation
8. nd 136 mm front plate 17 5kg 15 12 Contact If you have any questions suggestions or requests please do not hesitate to contact us finitus GmbH Dipl Ing Bert Gerlach Im Hongel 2 51789 Lindlar Fenke phone 49 0 2266 4783276 Email bert g finitus de Internet www finitus de 16
9. nstructions Do not use this apparatus near water Clean only with dry cloth Do not block any ventilation openings Install in accordance with the manufacturer s instructions Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not defeat the safety 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 wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Only use attachments accessories specified by the manufacturer Only use the power cord delivered with the device Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spil
10. reduced 6 2 Technical refinements Passive cooling Fan noise No the poambo uses purely passive cooling Quasi dc coupled system The lower cutoff frequency is so low that the poambo behaves like a dc coupled system Nevertheless it blocks dc voltages at the input protecting the speakers Temperature compensated auto bias The FTA fast temperature compensated auto bias of the poambo controls the bias voltage precisely and quickly As a result the poambo sounds extremely well even in a cold state after switch on Untouched subsonics The poambo uses no dc servo so even the lowest bass frequencies remain unchanged and are reproduced without coloration Nevertheless the dc offset of the poambo is below 1mV Two relays per channel The two output relays per channel provide a very low contact resistance and high reliability Each of them is full load capable Strong power supply The power supply of the poambo is fed by an oversized toroidal transformer and has a squadron of low ESR buffer capacitors Digital DC logic All signals that are in contact with the analog part are pure DC signals No clocks no buses no fast switching no interference The temperature sensors are analog too Ripple rejection The extremely high level of immunity against uncleanliness of the supply voltage makes the poambo incredibly unaffected by the used power cables and fuses The layout is adapted to the signal flow and provide
11. s in the supply voltage In addition the distortion is much lower than with resistive loads This technique is used not only in the differential part of the poambo circuits 10 2 NOD non intrusive opto coupled detection The goal of any detection should be not to affect the measurand in our case the audio signal Using an optically coupled circuit is very close to this ideal Neither there is a galvanic coupling nor can repercussions still occur 10 3 TDC true difference clip detection Since the internal supply voltages change slightly with the load in the poambo the real difference between the audio signal and the supply voltage is measured for the clip detection This difference is captured and analyzed with a safety margin so that the speakers are optimally protected in any load condition against overload distortion 10 4 FTA fast temperature compensated auto bias The bias voltage of an amplifier has to be controlled very precisely and should comply with the optimum within a few thousandth of a volt This optimum varies with the temperature of the amplifier stages which in turn is dependent on the ambient temperature and the current load of the driver and output stages All these parameters are covered by the FTA and it guarantees the observance of the optimum with the appropriate accuracy 10 5 OIS outside independent system Like all other finitus products the poambo is designed to be a system that is
12. s short distances and low impedances in the critical paths All resistors are metal film with only 1 tolerance thus circuit equality and very low noise is ensured The entire system has a linear phase the signals thus have a constant group delay This has a particularly positive impact on the hearing experience since our ears and brain are very sensitive to deviations of this kind in the time domain 10 7 Operating The poambo 7 1 Connection to the mains Set up the poambo and connect it to an AC outlet Be sure that your model fits your country voltage 7 2 Cabling of the audio signals Now connect the outputs of your feeding device preamp to the inputs of the poambo Connect your speakers to the outputs of the poambo speaker terminals Pay particular attention to the correct polarity i e both speakers should be connected with their positive terminal to the positive terminal of the poambo so that both speakers are working in phase 7 3 Powering up the poambo Now turn on the playback devices and your preamplifier and last the poambo 7 4 Listening to music Now its time to do what the poambo can do best be musically Start playback on your playback device and turn the volume control of your preamplifier slowly until a comfortable listening level is reached 8 Cleaning The poambo The poambo consists of brushed aluminum which easily shows fingerprints or dust The best way to clean t
13. t the speakers the speaker outputs of the poambo are switched off after longer periods of clipping Reduce the music level and the poambo will turn on the speaker outputs back on after a few seconds Over The maximum output power has been exceeded To protect your speakers and the output drivers the speaker outputs of the poambo are switched off after longer periods of over Reduce the music level Check the minimum impedance of your speakers If the error is corrected the poambo will turn on the speaker outputs back on after a few seconds DC The maximum DC voltage level has been exceeded This error either indicates music material with extreme low end lt 0 2Hz or there is an internal error In order to protect the speakers the speaker outputs of the poambo are switched off If this error occures frequently contact finitus and talk to a specialist Temperature The maximum permissible temperature has been exceeded This can occur in hot environments or by longer very high load The poambo switches off the speaker outputs and waits until the temperature is within the acceptable range again Then the poambo will turn the speaker outputs back on Mute One of the outputs is muted If one of the speaker outputs is switched off it is indicated with the mute LED The mute state can also be activated through network In this case no further error LED is lit 6 The Interior Of The poambo Analog
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