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Summary of Contents for Lehmannaudio Black Cube Linear
- Page 1 Black Cube Linear Headphone amplifier / Single Source Preamp User manual...
- Page 2 - Do not install the Black Cube Linear 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.
- Page 3 Otherwise, an extremely loud noise could damage your loudspeakers or even your hearing. - If you plan not to use the Black Cube Linear 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.
- Page 4 Lehmannaudio Manual Black Cube Linear - page 4 - _______________________________________________________________________________________________________________ Why headphones? When you use headphones you can reach a very high level of sound reproduction at a fraction of the price you would have to spend for a regular hfi setup with high quality loudspeakers.
- Page 5 Lehmannaudio Manual Black Cube Linear - page 5 - _______________________________________________________________________________________________________________ If the power is doubled then the resulting sound pressure level is 3dB higher. If this is calculated the other way round it means that only half of the power is needed when using a headphone with 3dB more effectivity to reach the same sound pressure level.
- Page 6 Lehmannaudio Manual Black Cube Linear - page 6 - _______________________________________________________________________________________________________________ Overview of power consumption of different headphones at different signal levels: level Headphone impedances 32 Ohms 60 Ohms 120 Ohms 300 Ohms 600 Ohms 0,1V 0,31mW 0,16mW 0,08mW 0,033mW 0,016mV...
- Page 7 Purchasing the Black Cube Linear was a perfect stepp in the right direction. All figures were taken from freely available data sheets of different manufacturers and have been partly recalculated from other dimensions.
- Page 8 _______________________________________________________________________________________________________________ Elements at the front section 1. Power LED When this LED lits the Black Cube Linear is connected to mains voltage switched on and ready for being used. 2. Headphone output 1 6,3mm headphone jack for common headphones. When a headphone is connected to this headphone output the line output at the rear side of the unit will be muted.
- Page 9 Depending on which headphone output you are using on the front side of the unit the signal is either fed through the Black Cube Linear to the line output or muted. The RCA jacks are connected in parallel to the Black Cube Linear’s output stage and not just passively connected to the...
- Page 10 _______________________________________________________________________________________________________________ Adjustment of maximum gain You can easily adjust the maximum gain of the Black Cube Linear to use any available headphone with best results independent from effectivity or impedance. The gain setting has direct effect on the active gain of the input stage which is placed after the volume potentiometer.
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Page 11: Technical Data
Lehmannaudio Manual Black Cube Linear - page 11 - _______________________________________________________________________________________________________________ Technical Data: Input impedance: 47kOhm Maximum gain: 0dB, 10dB, 18dB, 20dB Switchable underneath the unit Frequency response: 10Hz (-0,3dB) - 35kHz (-1dB) Signal to oise ratio: >95dB @ Gain 0dB THD: <0,001% @ 6mW/300 Ohm... - Page 12 Lehmannaudio Manual Black Cube Linear - page 12 - _______________________________________________________________________________________________________________ Notes Manufacturer’s address: Lehmannaudio Dipl. Ing. Norbert Lehmann Richard-Zanders-Str. 54 51469 Bergisch Gladbach Tel.: +49 2202 – 280 62 40 Fax: +49 2202 – 280 62 39 email: info@lehmannaudio.de Web: www.lehmannaudio.de...
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