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Page 2: ...reamplifier 7 Choosing the right input Impedance matching 8 9 Level matching 10 11 Some hints 12 Changing power supplies mains voltage 12 PROBLEM SOLVING 13 TECHNICAL SPECIFICATIONS 14 _______________...
Page 3: ...s special equipment foot made of selected wood avoids mechanical energy storage low noise moving coil input stage less annoying noise even with low output cartridges automatic adapting MC input stage...
Page 4: ...ents It may be used in dry places only If any kind of fluids water drinks soapsuds etc runs into the external power supply housing or into the preamplifier please unplug the mains plug immediately and...
Page 5: ...urn main volume down to minimum muting before switching any inputs MC1 MC2 or MC MM to avoid any thumb or pop noises Rear side overview Items 4 Ground connector for turntable ground tonearm motor base...
Page 6: ...ced connectors at one go That means both outputs can be used simultaneausly Mixed input output mode is also possible for example balanced in and unbalanced out can be carried out and vice versa as wel...
Page 7: ...align with the connectors notch Audio signal connections Connect your high level control preamplifier with a pair of high quality cables with balanced XLR or alternative unbalanced RCA Phonoplug Cinch...
Page 8: ...ut has a remarkable feature it matches the input impedance for your MC cartridge automatically Simply connect your MC system to The Grail s MC input and forget about impedance matching and all the res...
Page 9: ...olystyrene type capacitors and solder them into the connectors just as described before Reasonable capacitor values may vary from 47pF up to 330pF pF means pico Farad 10 12 F Always start with the sma...
Page 10: ...our phonograph preamplifier With The Grail this is easy done Simply remove the four Allen key screws of it s top plate Remove the top plate and take a look inside of the preamplifier you will find 2 s...
Page 11: ...reduced overdriving capability headroom of the preamplifier and more background noise Delivery condition for gain is 60dB MC and 40dB MM that means DIP switch slider 1 in position ON and slider 2 in...
Page 12: ...pply to 114 120Volts or to 230 240Volts with a slide switch inside the power supply cabinet Factory setting is 230 240Volts Attention Before opening the power supply cabinet be sure to disconnect from...
Page 13: ...the 120Volt mains version These are the fuses on the primary side of the transformer Another fuse on the secondary side of the transformer is on the printed circuit board of the external power supply...
Page 14: ...eve 250mV output level MM input at amplification factor 32dB 6 2 mV at amplification factor 40dB 2 5 mV at amplification factor 46 5dB 1 2 mV Input impedance 47KOhm 50pF MC input at amplification fact...
