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Owner`s Manual

HEADPHONE AMPLIFIER

P-750u

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Содержание P-750u

Страница 1: ...Owner sManual HEADPHONE AMPLIFIER P 750u ...

Страница 2: ......

Страница 3: ...HEADPHONE AMPLIFIER P 750u Contents Precautions 1 Features of This Unit 3 Names and Functions 5 Connections 9 Block Diagram 11 Specifications 12 Before Asking for Repair Service 13 ...

Страница 4: ...n circuit is activated the output to the headphones is shut off and the operation indi cator blinks to show that this unit is in the muting state When the cause to activate the protection circuit is eliminated the blue operation indicator light comes back on and the operat ing state resumes If the protection circuit is frequently acti vated after a lapse of a certain time and turning on the power ...

Страница 5: ...th to wipe the unit such as cleaning cloth When the dirt is hard to remove use a small amount of neutral detergent to wipe and then wipe the unit with dry cloth Do not use a solvent like benzine or thinner because such a substance can damage the exterior Caution when using headphones If the headphones are used for a long time at a high sound volume level your hearing may be damaged ...

Страница 6: ...in the amplification process is fed back for cancellation This maintains pure high quality sound repro duction in the main amplifier section The latest version ODNF 4 0 has achieved low impedance and a high signal to noise ratio for the transmission circuits thanks to the paralleled first stage and Darlington equipped second stage amplification circuits Also the input stage error detection circuit...

Страница 7: ...jack output socket Cast iron insulator For stability and support this product features cast iron feet with vibration reducing density gradient About balanced headphone connections Balanced headphones are driven by the amplifier output section with normal phase HOT and reversed phase COLD and support 4 core connections where the left and right ground wire COLD side is separated Generally 3 pin XLR ...

Страница 8: ...ing the output to other audio equipment ensure that the power is switched off ON Turns on this unit s power The blue operation in dicator light will blink and then light up steadily OFF Turns this unit s power off 3 Input selection switch INPUT This switch toggles between the unbalanced line input LINE balanced line 1 input BAL LINE 1 and balanced line 2 input BAL LINE 2 which are located on the r...

Страница 9: ...di cator light 9 Sensitivity selector switch SENSITIVITY This control can select between HIGH MID and LOW in ac cordance with the efficiency of the headphones being used If low efficiency headphones are used and the volume is insufficient even after turning up the volume control se lect HIGH If high efficiency headphones are used and the volume is hardly controllable select LOW The sensitivity of ...

Страница 10: ...low normal position q GROUND w COLD e HOT invert position q GROUND w HOT e COLD 14 Unbalanced line input connections INPUTS LINE These two RCA line input terminals are for an unbalanced stereo line input Connect these inputs to the unbalanced outputs of any input device such as a CD player using RCA cables 15 Through output connections THROUGH OUT These RCA output terminals are for connection to a...

Страница 11: ...lding down the headphone output selector button OUTPUT and the through output indicator will light up 5 Release the headphone output selector button OUTPUT 6 The power is turned on and the unit will go into nor mal operation mode with all settings restored to the factory defaults The memory reset procedure is complete If any abnormality is detected by this unit upon powering up all of the indicato...

Страница 12: ...9 Connections HEADPHONE UNBAL HEADPHONE BAL CONTROL AMP USB D A CONVERTER CONTROL AMP POWER AMP SPEAKER SYSTEM CD PLAYER SACD PLAYER L R L R L R L L R R L R PC Mac L R 3 pin XLR type 4 pin XLR type L R ...

Страница 13: ... counter clockwise to set the volume level to zero insert the 1 4 inch stereo jack plug of your unbalanced headphones into the stereo jack socket PHONES 1 on the front panel of this unit You may now ad just the volume control to the desired level The applicable impedance range of this unit is 8Ω to 600Ω for unbalanced headphones CAUTION Attention must be paid to the volume level be cause this prod...

Страница 14: ...Driver For AC SENSOR μ Computer Key LED ODNF Ver 4 0 LECUA Protector DC OC TEMP RECTIFIER REG off on off Volume Balance PHASE INVERT INV PHASE INVERT INV 1 Buffer B2 B1R B1R 1 2 3 B2 B2 B2 REG B2 Input Sensitivity REG REG Rch HOT Lch COLD Rch COLD MUTE THROUGH on 1 2 3 1 2 4 3 1 2 3 1 2 3 BAL 1 UNBAL BAL 2 UNBAL LINE BAL LINE UNBAL BAL 2 BAL PHONES 1 PHONES 2 PHONES 3 B2 B2 B2 B2 Volume Balance Se...

Страница 15: ... or more IHF A weighted input short Frequency response LINE UNBAL 20 Hz to 20 000 Hz 0 0 1dB 10 Hz to 170 000 Hz 0 within 3 dB BAL LINE BAL 20 Hz to 20 000 Hz 0 0 1dB 10 Hz to 170 000 Hz 0 within 3 dB Supplied functions Balance control Sensitivity selection Headphone output selection Through output selection Input selection Unbalanced headphone jack PHONES 1 1 line 4 pin XLR balanced headphone out...

Страница 16: ...ting of the input selector switch The selected item of the input selection switch of the control amplifier is not appro priate Properly adjust the input selector of the control amplifier The volume control of the input device such as a control amplifier is set to a lower level Adjust the volume control of the input de vice such as a control amplifier The REC OUT output of the input device such as ...

Страница 17: ...HEADPHONE AMPLIFIER P 750u 14 MEMO ...

Страница 18: ...15 MEMO ...

Страница 19: ......

Страница 20: ...LUXMAN CORPORATION JAPAN 1 3 1 Shinyokohama Kouhoku ku Yokohama shi Kanagawa 222 0033 Japan AG00987E68A Printed in Japan ...

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