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Страница 2: ...JOSEPHSON ENGINEERING Inc 329A Ingalls Street Santa Cruz California 95060 Tel 831 420 0888 Fax 831 420 0890 email info josephson com http www josephson com 2008 Josephson Engineering Inc ...
Страница 3: ...l foam basket Unlike traditional microphone housings made of perforated metal or screen with reflective metal support structures this highly open material protects the capsule mechanically provides electrical shielding and some pop and wind screening no supporting structure is necessary A fine acoustically transparent screen inside the basket helps protect the capsule from breath moisture when the...
Страница 4: ...ern or flip the phase of the rear facing signal and mix to make a figure 8 pattern Any intermediate pattern can be made by mixing the two signals in different proportions Use this chart as a starting point for your own experiments Pattern Rear Phase Front Gain Rear Gain Front Cardioid Normal 0 off Rear Cardioid Normal off 0 Subcardioid Normal 2 15 Omni Normal 3 3 Hypercardioid Invert 2 15 Figure 8...
Страница 5: ...alf of the C720 has this directional pattern one is facing forward and the other faces to the rear If you mix the front and rear signals equally the result is an omnidirectional pattern sounds are picked up evenly from all directions If you mix the front and rear signals in different ratios the result is an omnidirectional type pattern but not perfectly even Mixing the rear signal at 6 dB versus t...
Страница 6: ... from cardioid through the figure 8 end of the spectrum will have one or more nulls somewhere in the pattern and the direction and width of this dead zone make a big difference in the overall sound As you change patterns listen to how the overall room sound changes If you re working close to the microphone you ll also notice that the bass boost caused by proximity effect becomes stronger as you ch...
Страница 7: ...ear the effect of your adjustments on the overall pattern Adding a little bit of the rear facing cardioid say at 12 dB relative to the front will reduce the depth of the null in the back of the mic producing a sub or wide cardioid pattern less directional than the standard cardioid and with a greater level of room ambience Proximity effect is reduced too so if the performer is moving around too mu...
Страница 8: ...tput transformer which uses amorphous metallic glass as the magnetic core material The result is a much higher overload point even when the mic is driving long cables It is the same audio circuit and transformer found in Josephson s acclaimed e22S microphone The internal power supply of the C720 uses a new electrostatic circuit that provides capsule polarization charge without the use of oscillato...
Страница 9: ...The breakout cable diagram is shown here for reference The C720 will operate properly with either front or back sides of the microphone connected or both Full P48 phantom power is required ...
Страница 10: ... volts 5 mA per output Internal impedance 100 ohms Rated impedance 200 ohms Minimum load impedance 1k ohms Free field and rated sensitivity 1 7 mV Pa Frequency Range 20 20 000 Hz Directional characteristics 2x cardioid Overload sound pressure 136 dB SPL at 1000 Hz Equivalent sound pressure due to inherent noise 15 dB SPL A weighted rms in accordance with IEC 60268 1 ...
Страница 11: ...uirements of the European Union directives as follows Machinery 93 68 EEC Exempt passive sensor Low Voltage 93 68 EEC Exempt passive sensor EMC 93 68 EEC Exempt passive sensor RoHS 2002 95 EEC Compliant for Hg Cd Cr6 PBB PBDE and Pb David Josephson CEO Josephson Engineering Inc 329A Ingalls St Santa Cruz CA 95060 USA ...
Страница 12: ...y Josephson Engineering will at its option repair or replace any microphone that fails providing that it is returned to the factory prepaid and has not been abused or altered There are no user serviceable parts inside Josephson Engineering microphones Disassembling a Josephson microphone will void its warranty For service information please contact Josephson at 831 420 0888 Repair shipments may be...
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