Mystèreca11 User manual
Contents
1. using a small slotted flat blade screwdriver call The 6SN7 and 5AR4 tubes will have a life of about 10 000 hours Here are some tips on using tubes Do not use treatments on tube pins or in sockets If you decide to experiment with other tube types it s best not to swap tubes in and out repeatedly as you never want to cycle pre amplifiers on and off rapidly They should be left off for at least five minutes Further every time you insert a tube you stand a chance of loosening the tube sockets It s okay to have fun and we support that but don t go crazy and swap tubes in and out twenty times in a day Some tubes and tube socketshave a center key which must correspond If you use brute force and misalign you will damage important and ex pensive parts of your preamplifier The Myst re ca11 has a warm up time of just a few minutes While it is not wise to leave tube power amplifiers on 24 hours a day you may leave this preamplifier on though it will result in more frequent tube replace ment Through experimentation come to a conclusion that fits comfor tably with your lifestyle Break in yields improvements Every tube when new needs to be left alone for a little while So when your preamplifier is new or when you re tube it it may take a little time to settle in There is however no fixed time rule for break in Please note that tubes can vary electrically and by plugging in the wrong type of tu2. be you can damage the preamplifier and void your warranty myst re ita Tube Tip Some 6sn7 tubes are more microphonic than others In your call the 6sn7 positions most sensitive to this are the input tubes V1 and V2 Experiment if you want with different 6SN7 tubes in the market to get your opti mal sound You also may ex periment with the different tube dampers available in the market to fine tune your amplifier myst re call Some tips No output Power is on but power LED is off and tubes do not light up AC cable makes bad connection in IEC connector Please check No output Power is on but power LED is off and tubes do not light up Mains fuse is out Replace fuse as per instructions on page 5 No output Power is on but power LED is off and tubes do not light up Mains fuse is not out Thermal protection may have switched off power transformer If so the preamplifier will switch on again after internal temperature of power transformer returns to normal Overheating might be caused by higher environment temperature than normal or heavy use No output Power LED is on and tubes do light up normally Check input selector setting input and output wiring if all seems to be OK check power amplifier Hum or noise coming from one channel Noisy tube First swap the 6SN7 tubes left to right If noise follows tube swap then you have found the problem tubeset Now swap one by one from le
3. en Dungen DUROB AUDIO BV myst re MERE Table of Contents DE T a 2 Specifications nnn 2 R AS QUE 3 eine SEM ements ym 4 oe n 5 Prote cO oe ee 5 Tube Basics oc 6 Troubleshooting me ae 7 wea e 8 ON E er eee 9 Copyright Durob Audio B V 2009 myst re MERE call To prevent serious injury electrical shock or fire Contents Do not operate with bottom plate removed 1x Myst re ca11 Keep away from rain and moisture Preamplifier Disconnect all cable connections before changing fuses and or tubes Do not replace tubes without reading instructions 1x Power Cord Do not replace fuses or tubes if you have any doubt about your ability to do so We accept no responsibility for any personal or material damage due to incompetent use or users 52 Remove the Myst re ca11 from its packaging Use the white gloves Ix White Gloves TS Remove the tube cage by carefully pulling it up and away from the pre T amplifier Hd pelt iy r j Tubes 4x 6SN7 a Remove the protective foam surrounding the tubes Ix SAR4 E e Check that each tube is firmly seated in its socket Use gloves 1x Owner s Manual Replace cage back in its place if desired Fuses 1x SAT 100 120 VAC Check to see the power switch is off down or 1x 3AT 200 240 VAC Connect each source to the corresponding plugs Connect output of preamp with input of poweramp Connect your speaker wires to to to your power amp Plu
4. ft to right If noise follows you have found the problematic tube Hum or noise coming from one channel or two channels Check rectifier tube 5AR4 swap with new 5AR4 tube if hum disappears then replace faulty 5AR4 tube Noise distortion coming from both channels Tubes may be in need of replacement Read page 6 for tube basics and replacement options Maintaining tube equipment can be easy if you have spare tubes At least one tube of each type If you try these possible solutions and problems persist contact us or your local distributor for further investigation myst re MERE call Two year limited warranty Six month warranty on stock vacuum tubes 1 Limited to original purchaser This warranty is for the sole benefit of the original purchaser of the covered product and may not be transferred to a subsequent owner 2 Conditions amp Limitations This warranty is subject to conditions and limitations as follows This warrantly is void and inapplicable if the product has not been used in accordance with the instructions found elsewhere in this manual or if it has been misused abused damaged by accident or neglect or in transport once in possession of purchaser The warranty is also void if the product has been tampered with or has been repaired or modified by anyone other than Durob Audio BV or its specifically authorized representatives 3 Remedy If this product contains material manufacturing
5. g powercords into pre and power amplifier then into wall sockets Switch the preamplifier on and wait for 30 60 seconds to warm up Do not replace fuses with any Switch the poweramplifier on after the preamplifier has been on for 30 fuse other than the same type 60 seconds and rating as used by the factory The tubes will be warmed up and ready to use in about 30 seconds Warning call The front panel and the chassis of the Myst re models are finished in high gloss piano lacquer The volume is controlled in pre defined steps with the knob on the right source selec tion is on the left Your sources are labelled 1 2 3 and 4 no func tional differences between these The power switch is locat ed on the right side of the amp just behind the front plate Looking at the rear panel you will note you have 4 pairs of stereo inputs 1 set of preamp outputs terminal mys t r MERE Fuse Protection A note on fuses Fuses are safety valves They should always be replaced with the exact same value and type Warning Never attempt to check or replace a fuse while the amplifier is plugged in Turn off the amplifier Unplug all speakers components and AC cords Wait 10 minutes to let tubes cool down and the circuit to fully discharge Mains Fuse The mains fuse is located on the rear of the amplifier at the top of the power cord socket The fuse holder can be snapped out
6. ge were shaped with the inner surfaces of many stones being dressed to be either flat or concave and their outer surfaces irregular or convex The contrasting acoustic experiences between the inside and outside of the stone circle that result from the shaping and placement of these stones may have been utilised by the ancient builders to isolate people on the outside from the activities at the centre An audience occupying the inner circle of Stonehenge would have heard amplified sounds In contrast no one outside the monument could have clearly seen or heard events within thus creating a sense of mystery Recent research suggests that the original Stonehenge probably had an almost concert like acoustic that our ancestors developed and perfected over many generations While undertaking a series of tests one researcher commented A simple drum beat sounded incredibly dramatic It felt special Similarly we want to invite you to join our select inner circle of audiophiles to sample the delights of the Myst re series Be enticed towards the faint orange glow of the tubes that peer out from between the vertical slots of the sleek cover Marvel at the realism and joy of music that has been perfected over many generations of equipment design resulting in the Mystere range of audio products Now your search for the ultimate experience is over
7. or workmanship defects it must be packed in orginal pack P aging and returned to Durob Audio BV or its authorized representative via insured freight at the owner s expense Returned products must be accompanied by written description of the defect and a return authorization number available from Durob Audio BV or the authorized representative via e mail Upon receipt of the defective product Durob Audio BV or the authorized representative agrees to repair the product without charge for parts except vacuum tubes if the unit is more than 6 months old or labor The product will then returned via prepaid insured freight with carrier at the sole determination of Durob Audio BV or the authorized representative This constitutes the purchaser s sole remedy 4 Design change Durob Audio BV and its partners reserve the right to modify their products or change specifications at any time without obligation or liability to previous purchasers 5 Miscellaneous Any implied warranties relating to the above product shall be limited to duration of this warranty This warranty does not extend to any indentical or consequential costs or damages to purchaser or third parties Our liability will be no more than the amount you paid for the product that is the subject of a claim This is the maximum amount for which we are responsible This warranty gives you specific legal rights You may also have other rights which vary from country to countr
8. rrent system and you ll hear an immediate and profound Lt bent improvement a huge step on the road to perfection www mystere usa com san call We would like to thank you for choosing our Myst re cal1 preamplifier as an important part of your music system Working with components across the spectrum day in and day out for more than 30 years led us to adopt an unassailable philosophy the only acceptable level of quality for the products we produce is the highest quality regardless of price point We have staked our reputation on this and are certain that the products we ve already brought to market reflect this principle We feel comfortable in stating that our standing in the audio community is of the highest order and we re certain that Myst re will only serve to enhance that standing We hope that the Myst re ca11 preamplifier will make you want to follow our next steps in expanding this new range of products If you have any questions or comments don t hesitate to contact us You can also share your thoughts with others at www audioreview com or other review sites On the www mys tere eu com website you will find links to these and other websites Our prices are kept low by using word of mouth and customer feedback and we would appreciate hearing what you have to say about our product If you need ser vice during or after the warranty period please contact us Thanks again for your support Herman van d
9. x myst re call The ca11 preamplifier picks up where the ia11 and ia21 left off Specifications When paired with either the pa11 or pa21 power amp it produces a sound so beguiling so emotional so utterly exquisite you ll know Bandwidth 8HZ 200kHz 47K load MES avieaven Noise 104dB wtd a ref 1V The designs of Myst re separates represent so much more Gain gt cae than simply splitting the integrateds into pre and power stages a Distortion nu 0 05 100mV output HO technique common in the industry today Like all our separates its chassis provides space a tremendous advantage More space 0 12 1V output BEE rot do UE ane es ees ee es for the most advantageous wiring positions rue te ee ee Output imp 592 Ohm The ca11 uses an SRPP Series Regulated Push Pull circuit for Max headroom 25dB rel to 1V output 19V high gain low distortion and very low output impedance by L tena eine E Se E E EE seer eer ee naeenere using a variation of the White Cathode Follower The circuitusesno Crosstalk 24dB20fz720k7 negative feedback for more natural tonality Net weight 15 kg We continue to use our high quality heavy duty 24 step volume Dimensions 320x370x200 mm Ixwxh attenuator and fast wide band polypropylene caps Like all our products the pre amps are point to point hand wired with rigid copper wire loosely insulated with woven silk tubing Websites EEE ae E pall or ca ea cu
10. y and state to state Sales amp Support Myst re Durob Audio BV PO Box 109 5250 AC Vlijmen The Netherlands 31 73511 2555 www mystere eu com info mystere eu com Email us for your local distributor myst re The Myst re Story Its midnight and the year is 1 500 BC An eerie wind is blowing across the Salisbury Plain in southern England and the flat green ground is bathed in the moon s ghostly light A faint orange glow can be seen in the distance seemingly coming from a huge circle of majestic stones that stand out in solitary grandeur against the barren landscape As one draws closer dark figures dancing around the wooden fire that smoulders at the centre of the great circle of stones become visible Strangely not a sound can be heard The whole place is shrouded in mystery am of course referring to the world famous Stonehenge which stands to this day as a powerful tribute to the people of the late Stone and Bronze Ages and consists of a ring of extremely large stones and while modern techniques in archaeology have helped shape new theories about these stones their ultimate purpose nevertheless remains a fascinating and enduring mystery Whatever their exact purpose was recent research has revealed that the stones at Stonehenge are able to contain and amplify sounds Furthermore most sounds made in the centre are not clearly transmitted beyond the rings of stone Almost all of the stones at Stonehen
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